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Wensley & Lawz LtdAir Conditioning Inspection Report

Report Type: Complexed Central (Level 4)

Company Name: Oldham Civic HallAddress: Civic Centre

West StreetOLDHAMOL1 1UT

Name of Inspector: Stephen MorganInspector Number: STER000293Accreditation Scheme: Sterling Accreditation LimitedInspection Date: 07/01/2013Report Expiry Date: 07/01/2018

Accredited Company: Wensley & Lawz LtdAddress: National Westminster Building, 116-118

Walsgrave Road, CoventryCV2 4ED

UPRN: 527511990000Certificate RRN: 0192-0199-7960-3500-5703Report RRN: 0350-0157-9579-2909-1002

Assessor Signature

This document contains proprietary and confidential information which may not beused or reproduced in whole or in part, or communicated to a third party without priorwritten consent of the energy assessor.

Legislation

Air conditioning energy assessments are now a legal requirement under The EnergyPerformance of Buildings (Certificates and Inspections) (England and Wales)Regulations 2007 SI 2007/991 amended by SI 2007/1669, SI 2007/3302 and SI2008/647.

For air-conditioning systems, the person who controls the operation of the system isthe person who has the responsibility for ensuring an inspection takes place. Theperson who controls the operation of the system is the person who controls thetechnical functioning of the system, not someone who can just alter the temperature.Only systems providing comfort cooling for the benefit of building occupants areincluded in the regulations.

The deadline for the first air conditioning assessment to be completed of all existingsystems over 250kW total cooling capacity was 4th January 2009.

The deadline for the first air conditioning assessment to be completed of all existingsystems over 12 kW total cooling capacity was 4thJanuary 2011.

New air conditioning systems over 12 kW which were installed after January 2008must be inspected within 5 years of being put into service.

The total cooling capacity of a buildings air conditioning system is calculated byadding up the capacity of all the individual systems in that building.

Air conditioning energy assessments must be carried out by an accredited AirConditioning Energy Assessor.

Why Air-Conditioning Inspections are Required

Having your air-conditioning system inspected by an Energy Assessor is designed toimprove efficiency and reduce the electricity consumption, operating costs andcarbon emissions for your system. Energy inspections will highlight improvements tothe operation of your existing systems or opportunities to replace older, less energyefficient systems or oversized systems with new energy efficient systems.

As the replacement of refrigerant is restricted in older systems (as establishedunder other legislation), there is an additional incentive to improve or replace oldersystems with more modern energy efficient units. Building owners and managerswho control air-conditioning systems have statutory obligations and duties of care inthe operation and maintenance of air-conditioning systems.The energy assessment inspection discussed in this report is in addition to thenormal activities associated with the ownership and operation of air-conditioningsystems. Inspection, maintenance and cleaning programmes maintain the ability ofthe system to provide healthy and comfortable environments for building occupants,limiting the escape of refrigerant gases and ensuring the safety of equipment. Thepractices and procedures needed to achieve these aims should be applied morefrequently than the assessment for energy efficiency.

What does the Inspection Cover?

The inspection visually examines a sample of refrigeration and air movementequipment, and their controls. Site notes, photographs, room measurements andtemperature readings are taken during the inspection.

It also examines any documentation that helps to understand the systems, orindicates the extent to which the systems have been maintained.

The energy assessor also estimates whether the system is suitably sized for thecooling loads in the treated spaces, and to provide advice on ways in which theperformance of the system might be improved.

Building owners and managers should not expect the air conditioning energyassessment to identify hazards or unsafe aspects of the installation, operation ormaintenance of systems that should be identified and addressed by otherarrangements, nor should they expect the energy assessor to fix any problemidentified as part of the inspection.

Lodgement of the Air-Conditioning Report

Completed Air-Conditioning Energy Assessment Reports are formally lodged aslegal documents through an accreditation scheme and a Certificate of Inspectioncreated. This formally records the production of the report.

Implementing RecommendationsThe recommendations are provided as an indication of opportunities that appear toexist to improve the air conditioning systems energy efficiency.

The recommendations are based on best practices from known information at thetime of this report. The recommendations are based on the assessor’s knowledgeof the system and its use.

These recommendations, unless specifically itemised do not include matters relatingto the operation and maintenance which cannot be identified at the time of thesurvey.

For long term energy saving and running cost reduction we recommend that theshort to medium term proposals are progressed quickly with an action plan for longterm improvements.

Legal Disclaimer:The inspection and subsequent report is provided to comply solely with therequirements of the EPBD. The inspection procedure has been conducted followingguidance from CIBSE TM44 and is a visual observation inspection only. No detailedmeasurements have been carried out during the inspection process unless indicatedotherwise.

Where data has not been provided estimates of installed cooling capacity and theappropriateness of plant and equipment have been made using rules of thumb only.No guarantee as to the accuracy of the data or of the recommendations is made.

Whilst reasonable steps have been taken to ensure that the information containedwithin this report is correct, you should be aware that it may be incomplete,inaccurate or may have become out of date. Accordingly, the energy assessor, itsagents, contractors and subcontractors make no warranties or representations ofany kind as to the content of this report or its accuracy and, to the maximum extentpermitted by law, accept no liability whatsoever for the same including without limit,for direct, indirect or consequential loss, business interruption, loss of profits,production, contracts, good will or anticipated savings. Any person making use ofthis report does so at their own risk.

Further Information

1. British Standards Institution. (2007). BS EN 15240: 2007: Ventilation forBuildings. Energy Performance of Buildings. Guidelines for the Inspection ofAir-Conditioning Systems. London: British Standards Institution.

2. Chartered Institution of Building Services Engineers. (2006). Building EnergyMetering CIBSE TM39. London: Chartered Institution of Building ServicesEngineers.

3. Chartered Institution of Building Services Engineers. (2006). Building LogBook Tool kit CIBSE TM31. London: Chartered Institution of BuildingServices Engineers.

4. Chartered Institution of Building Services Engineers. (2007). Inspection ofAir Conditioning Systems CIBSE TM44. London: Chartered Institution ofBuilding Services Engineers.

5. Chartered Institution of Building Services Engineers. (2006). EnergyAssessment and Reporting method CIBSE TM22. London: CharteredInstitution of Building Services Engineers.

6. Chartered Institution of Building Services Engineers. (2004). EnergyEfficiency in Buildings CIBSE Guide F. London: Chartered Institution ofBuilding Services Engineers.

7. Chartered Institution of Building Services Engineers. (2001/2). Heating,Ventilation, Air Conditioning and Refrigeration Guide B London: CharteredInstitution of Building Services Engineers.

8. Official J. of the European Communities L1/65 (4.1.2003). (2003). Directive2002/91/EC of the European Parliament and of the Council of 16 December2002 on the Energy Performance of Buildings (The Energy PerformanceDirective). Brussels: Commission for the European Communities.

9. Department for Communities and Local Government. (2010). Non-DomesticBuilding Compliance Guide. Department for Communities and LocalGovernment.

10.The Carbon Trust. (2003). Building Log Books – A User’s Guide. TheCarbon Trust.

11.The Energy Performance of Buildings (Certificates and Inspections) (Englandand Wales) Regulations. (2007). Statutory Instruments 2007 No. 991.London: The Stationery Office.

12.Heating and Ventilation Contractors’ Association. (2005). TR19-HVCA Guideto Good Practice Internal Cleanliness of Ventilation Systems.

13.Heating and Ventilation Contractors’ Association. (2000). DW143-HVCAPractical Guide to Ductwork Leak Testing Guide.

14.Health and Safety Commissions. (2000). L8 – The Control of LegionellaBacteria in Water Systems Approved Code of Practice & Guidance.

15.Standard Maintenance Specification for Mechanical Services in Buildings.(2004). HVCA SFG20/M1 – Heating and Ventilation Contractors’ Association.

16.BSRIA. (2010). BG 9/2011 – Rules of Thumb Guides for Building Services5th Edition.

17.CIBSE Publications – www.cibse.org

18.BRE Publications – www.bre.co.uk

19.F Gas Guidance – www.defra.gov.uk/fgas, www.acrib.org.uk/MG7OLH18285

20.Department of Communities and Local Government www.communities.gov.uk

http://www.cibse.org

http://www.bre.co.uk

http://www.defra.gov.uk/fgas

http://www.acrib.org.uk/MG7OLH18285

http://www.communities.gov.uk

Executive SummaryThe air conditioning systems inspected at this site have been found to conform tothe minimum level of energy efficiency prescribed by the CIBSE TM44 methodology.

This report is to consider the status of air conditioning equipment against therequirements of the Energy Performance of Buildings (Certificates and Inspections)(England and Wales) Regulations 2007 which mandate for period inspections aimedat optimizing energy efficiency.

This report should be retained as evidence that the required inspection has beenundertaken, and it is recommended that consideration be given to implementing thereport’s recommendations aimed at reducing energy consumption.

All systems were inspected in as much detail as possible according to CIBSE TM44conventions. The systems were found to be generally in a good state of repairwithout any significant material defects unless stated otherwise in this report.

The building was constructed using bricks, blocks and stone construction in 1977and comprises of a ten storey tower and a connecting three storey building. Thecore activities within the building relate to an office but as it is a council civic centerthere are meeting rooms, council chamber and the Queen Elizabeth Hall. Theoccupancy hours are generally between 09:00 to 17:00 Monday to Friday the councilchamber and the Queen Elizabeth Hall are occupied as required. The conditionedarea can accommodate approximately 700 occupants. Based upon some basic sitemeasurements the complex comprises a net conditioned area of approximately9900m2.

The building has two Climate 420kW screw chillers connected to three roof mountedfan assisted heat exchangers which serve seven AHUs. The AHUs are located inthe Tower, Queen Elizabeth Hall, Council Chamber, Chadderton & Failsworth Suite,Rochdale Road Offices, Foyer & Workshops and the Bar & Offices. The Cromptonand Lees Suites also have AHUs which are independently served by eitherMitsubishi or Axair DX units. The AHUs are all located in plant rooms around thebuilding and are connected to the conditioned areas by a series of insulatedductwork and terminal grilles. The above system is controlled by a BMS systemwhich can be accessed from the maintenance manager’s office in the workshoparea. The Lees Suite has been pre-set locally to a set point of 23 degrees and thereis no method of on-site alteration. The Rochdale Road offices also have 120versatemp units positioned around the perimeter of these offices these areconcealed units with individual controllers. The versatemp systems worksindependently of the AHU system in the same area so there could be a possibility ofsimultaneous heating and cooling, it is therefore recommended that the versatemp's

are altered to be controlled from the BMS. The main reception has an independentMitsubishi Heavy Industries system connected to three cassette type terminal units.

At the time of the inspection the Bar & Offices AHU was not operational due to afaulty heat exchanger and the access to the Versatemp's was limited due torenovation works which were under way and that the offices that had beenrefurbished the units were still covered by the warranty of the main contractor.

The SFP on some of the AHUs are high see the report and table below.

The Specific Fan Power (SFP) for an air distribution system is based upon the sumof the supply fan motor (Psf) and extract fan motor (Pef) divided by the greatest airvolume (q), this data is used to review systems against the latest limits designed toreduce energy consumption by air distribution systems.

SFP – Specific Fan Power demand of the air distribution system [W/(l/s)].

Psf – Total fan power of supply fans at design air flow rate including losses throughswitchgear and controls associated with powering and controlling the fans (W).

Pef – Total fan Power of extract fans at design air flow rate including losses throughswitchgear and controls associated with powering and controlling the fans (W).

q – Design air flow rate through the system, which should be the greater of either thesupply or exhaust air flow rate (l/s).

System TypeNew Buildings

SFP (W/(l/s)

ExistingBuildings SFP

(W/(l/s)Central mechanical ventilation (includingheating and cooling). 1.8 2.2

Central mechanical ventilation (heatingonly). 1.6 1.8

All other central systems. 1.4 1.6Zonal supply systems where the fan isremote from the zone. 1.2 1.5

Zonal extract system where the fan isremote from the zone. 0.6 0.6

Zonal supply and extract ventilation unitssuch as ceiling void or roof units servinga single area with heating and heatrecovery.

2.0 2.0

Local supply and extract ventilationsystems such as wall/roof units servinga single area with heating and heatrecovery.

1.8 1.8

Local supply and extract ventilation unitssuch as window/wall/roof units serving asingle area.

0.4 0.5

Other local ventilation units. 0.6 0.6Fan assisted terminal VAV units. 1.2 1.2FCUs (rated weighted average). 0.6 0.6

Table 1 - Specific Fan Power taken from Non-Domestic Building Compliance Guide 2010

For central systems that include additional ancillary items such as heat recoveryunits, humidifiers and high grade HEPA filters then the SFP is increased dependingupon the components included. These can be found in the latest guidancedocumentationwww.planningportal.gov.uk/uploads/br/Non-Domestic Building Compliance Guide2010.pdf.

The total calorific output is 940kW. All systems were available to be operated withinthe control environment and assessed as part of the EPBD requirements.

The client did not issue a lot of documentation prior to the site visit however someinformation was made available on the day of the visit.

An external refrigeration contractor, LAC Air Conditioning Limited maintains thecooling systems and carry out routine maintenance on a monthly basis. During theinspection records were not made available. The site has no F-Gas log.

http://www.planningportal.gov.uk/uploads/br/Non-Domestic%20Building%20Compliance%20Guide%202010.pdf

http://www.planningportal.gov.uk/uploads/br/Non-Domestic%20Building%20Compliance%20Guide%202010.pdf

Sampling Methodology

Two Climate Screw chillers, Three Mitsubishi DX units, Three Axair DX units, OneMitsubishi Heavy Industries split system with three cassette terminal units, NineAHUs, Three Versatemp units and five grille terminal units. One BMS and oneMitsubishi Heavy Industries wall mounted controller were selected to be inspected

Cooling Loads Rule of Thumb

Cooling loads for different types of building (W/m2 gross internal area, unlessotherwise stated)

DescriptionCooling load

(W/m2)Banks 160Data centres 1500Hotels 150Offices 100-160Restaurants 200Retail establishments 140Residential buildings 70

Based on the 5th edition of BSRIA’s Rules of thumb – Guidelines for building services

Key Recommendations

High Priority

There was no F-Gas Log Book available on site for the cooling plant. As this plant has arefrigeration system with refrigerant charges in excess of 3kg it is a legal requirementto demonstrate compliance with F-Gas regulations. An F-Gas Log Book may exist withthe refrigeration contractor; this should be checked and preferably kept on site.F–Gas/HCFC Regulations: For systems on site that have a refrigerant charge of over3kg the client must ensure that an F-Gas Log Book is created for each system, seebelow for further details. The client should also consider including within this scope ofwork all non-hermetic systems containing refrigerant charge greater than 0.5kg. TheKyoto protocol is due to be renewed in 2012 and the inter-governmental panel arealready considering introducing a limitation on the level of Global Warming Potential(GWP) of the latest HFC refrigerants similar to that being introduced by the EuropeanUnion regarding automotive air conditioning that will limit refrigerants used in thesesystems to 150kgCO2 GWP100a. As part of the industry’s response to potentially newrestrictions the UK Government is ‘considering’ lowering the minimum trigger limit forF-Gas inspections to 500g, so by introducing these check/logs now the client willalready be compliant. Some contractors are now compiling an additional Indirect LeakTesting Report to complement the F-Gas Log Book. It is recommended that a similarapproach is taken at this site and the following system parameters are collected to formpart of the Indirect Leak Testing Report:

The refrigerant pipework insulation on cooling plant VOL001/SYS001/CP1 & 2 hasnumerous gaps and is perished in places which will reduce system performance andenergy efficiency. It is recommended that all pipework is inspected and damagedinsulation is either repaired or replaced.

To improve future inspections it is recommended that a Building Log Book is createdand that all the major plant design details/controls are listed. As part of the latestBuilding Regulations Part L 2010 the provision of a Building Log Book is now law for newbuildings and existing buildings that have undergone major refurbishment work. It isdesigned to give the facilities team a single document that covers the general operationof the HVAC plant at design/commissioning stage with information to enable the teamto optimise the system controls to ensure that the internal environmental conditionsmeet the requirements of the building users whilst optimising the operations to ensurethat energy consumption is minimised. The document should also include information toenable the operator to record energy consumption of the building/services to enable acomparison against the design benchmark data.

It is recommended that the maintenance contractor be called to attend site andpressure test the system and repair the leakage on VOL001/SYS001/CP1.

It is recommended that the water leak on the main reception cooling plant be repaired.

AHU VOL001/SYS001/AHU1 filters were dirty, it is recommended that the filters in theAHU be replaced urgently then monitored to assess an appropriate frequency to changethem in the future.

It is recommended that the AHU filters are changed or cleaned every 3 months in linewith current industry guidelines, or when the static pressure is twice that of the cleanfilter pressure.

It is recommended that the rear access panel on the QE Hall AHU be repaired and theheat exchanger be chemically cleaned.

It is recommended that the maintenance provider investigates why the filter pressuregauge is not working on the QE Hall AHU.

It is recommended that the exhaust damper linkage on the Lees Suite AHU be repairedas it was broken at the time of the inspection.

It is recommended that the Varsatemp return air filters are cleaned and themaintenance frequency reviewed.

Medium Priority

The building has a main fiscal electricity meter with no additional sub-metering and anatural gas meter for the heating and domestic hot water services. With the creation ofa Building Log Book and improved smart metering future inspections will be able toprovide specific energy savings with simple payback periods.

When replacing the AHU drive motors in the future the client should ensure that thelatest high specification motors are procured.

It is recommended that as part of the PPM all drive belts should be regularly checkedutilising a tensioning tool and setting to correspond with the manufacturer’s literature.It is also recommended that the pulley grooves are inspected to check for excessivewear. Both these simple checks could reap savings of over 5% of motor power bytaking early corrective action.

Simple instructions in the form of a notice can be a very easy way to ensure thatemployees are made aware of bad practices that can lead to excessive energy wastefrom space conditioning equipment. Consider mounting guidance notes in a prominentposition near terminals and controls advising occupants to be wary of operating thesystem whilst windows are open, heating is on, or when the room is unoccupied. Alsoadvise on a suitable temperature setting.

It is recommended that options of installing run around coils are investigated for theAHUs that have the supply and exhaust air stream located in nearby areas. It is notalways practical to recover this energy due to the actual application/current supply andexhaust arrangements, but in some cases a simple run around coil arrangement couldrecover up to 60% of this energy. This energy is then transferred back into the supplystream reducing heating loads in winter and possibly cooling loads during peak summerweather. The operation of these systems must be linked back into a unit controller orBMS to ensure that true savings are realised.

Many plants are now assessing the potential energy saving possibilities from introducingnew low energy filters. With ever increasing attention being paid to energy consumptionmany of the filter manufacturers have invested in research to improve air quality whilstreducing pressure loss across the filters. This enables them to work for long periodsbefore they require to be changed. With a large amount of energy required to power theAHU motors, small reductions in system static pressure will lead to an overall reductionin energy consumption.

An option of night purging should be further investigated. This is when the coolerexternal evening air is circulated within the building there by cooling the building fabricthus reducing peak building cooling loads. By utilising the cheaper night electricity tariffthe cost of operating the AHU will be minimised offering greater fiscal savings. The BMSstrategy must ensure that hold-offs are placed upon the cooling plant and boiler.

It is recommended that the possibility of DCV be considered. Demand-controlledventilation (DCV) using carbon dioxide (CO2) sensing is a combination of twotechnologies: CO2 sensors that monitor CO2 levels in the air inside a building, and anair-handling system that uses data from the sensors to regulate the amount ofventilation air admitted. CO2 sensors continually monitor the air in a conditioned space.Given a predictable activity level, such as might occur in an office, people will exhaleCO2 at a predictable level. Thus CO2 production in the space will very closely trackoccupancy. Outside CO2 levels are typically at low concentrations of around 400 to 450ppm. Given these two characteristics of CO2, an indoor CO2 measurement can be usedto measure and control the amount of outside air at a low CO2 concentration that isbeing introduced to dilute the CO2 generated by building occupants. The result is thatventilation rates can be measured and controlled to a specific cfm/person based onactual occupancy. This is in contrast to the traditional method of ventilating at a fixedrate regardless of occupancy.

At present the fan assemblies in AHU VOL001/SYS001/AHU2, 3, 4, 5, 6, 7, 8 & 9 are allfixed speed. The introduction of variable speed drives to the AHU motors and improvedoverall unit controls back to the BMS would see significant reduction in energyconsumption by the AHU. It is recommended that the client should investigate furtherthe option of installing variable speed drives with dynamic control based on systempressures via floor supply dampers or from additional CO2 sensors. A 10% reduction infan speed could lead to energy savings of over 25%.

When replacing the AHU drive motors in the future the client should ensure that thelatest high specification motors are procured.

A thermal wheel consists of a circular honeycomb matrix of heat-absorbing material,which is slowly rotated within the supply and exhaust air streams of an air handlingsystem. As the thermal wheel rotates heat is picked up from the exhaust air stream inone half of the rotation, and given up to the fresh air stream in the other half of therotation. Thus waste heat energy from the exhaust air stream is transferred to thematrix material and then from the matrix material to the fresh air stream, raising thetemperature of the supply air stream by an amount proportional to the temperaturedifferential between air streams, or 'thermal gradient', and depending upon theefficiency of the device. The airstreams must be flowing in opposite directions or nobeneficial heat exchange can occur. The principle of course works in reverse and 'coolth'energy can be recovered to the supply air stream if so desired and the temperaturedifferential allows.

The Council Chamber AHU had a fluid filled manometer that was not working due to alack of fluid. It is recommended that the fluid be replenished and maintained that wayand the next time the new filters are fitted the gauge should be marked to indicate thegood air flow position. This will aid in the identification of increased static pressure dueto filters being blocked.

It is recommended that the flexible joint in the Council Chamber AHU be replaced toreduce air leakage.

A thorough examination of all ductwork should take place regularly in accordance withDW143-HVCA Practical Guide to Ductwork Leak Testing and any repairs should becarried out. Duct leakage can waste a significant amount of energy in HVAC systems.Measures for reducing duct leakage include installing duct installation and performingregular duct inspection and maintenance, including routine leak detection and repair.Repairing duct leaks in industrial and commercial spaces can reduce HVAC energyconsumption by up to 30%.

It is recommended that the client introduces summer, winter and autumn/spring set-points/operating conditioning to minimise energy waste. The winter set-points shouldbe between 19°C and 20°C with the unit set to heating only mode and summer set-points of 23°C to 24°C operating in cooling only mode. Due to the fluctuating externalconditioning during spring/autumn the option of utilising auto mode would ensure thatset-points (21°C - 22°C) are satisfied with minimal adjustments required to thecontrollers. From previous Carbon Trust studies it is recommended that when heatpumps are in cooling mode that they are set to maintain 24°C, with an estimatedsaving of 4% on annual system running costs for every 1K increase in cooling set-pointtemperature.

It is recommended that the client introduces summer, winter and autumn/spring set-points/operating conditioning to minimise energy waste. The winter set-points shouldbe between 19°C and 20°C with the unit set to heating only mode and summer set-points of 23°C to 24°C operating in cooling only mode. Due to the fluctuating externalconditioning during spring/autumn the option of utilising auto mode would ensure thatset-points (21°C - 22°C) are satisfied with minimal adjustments required to thecontrollers. From previous Carbon Trust studies it is recommended that when heatpumps are in cooling mode that they are set to maintain 24°C, with an estimatedsaving of 4% on annual system running costs for every 1K increase in cooling set-pointtemperature.

Air Conditioning Inspection Certificate

RRN: 0192-0199-7960-3500-5703 Page 1 of 1

Site Details:

Equipment Owner’s Organisation Civic Centre

Equipment Owner’s / Manager Name Graham Dixon Telephone 01617703936

Equipment Owner’s Address Civic Centre, West Street, OLDHAM, OL1 1UT

Site Address(where inspection was carried out)

Civic Centre, West Street, OLDHAM, OL1 1UT

City OLDHAM Post code OL1 1UT RRN 0192-0199-7960-3500-5703

Related RRN 0350-0157-9579-2909-1002 URPN 527511990000 AC Inspection Level Level 4

Report Information:

Inspection Date 2013-01-07 Next Inspection Date 2018-01-07 Issue Date 2013-01-13

Assessor Details:

Assessor Name Stephen Morgan Assessor ID STER000293

Employer/Trading Name Wensley & Lawz Ltd

Employer/Trading Address National Westminster Building, 116-118 Walsgrave Road, Coventry, CV2 4ED

Accreditation Scheme Name Sterling Accreditation Limited

Website Address

Related Party Disclosure Not related to the owner/occupier or person who has technical control of the system orsubcontractor.

Assessment Software Used Sterling Accreditation, Sterling e-Volve, v1.2

F-Gas Compliant Date/Not Applicable

Not Provided Total Effective RatedOutput (kW)

940 System Sampling? Yes

Treated Floor Area (m²) 9903 Air Conditioning SubSystems Metered?

No Total EstimatedRefrigerant Charge (kg)

386

The following sub systems were inspected in accordance with DCLG guidance to produce this air conditioning report

Sub System ID Sub System Description Refrigerant Type(s) Age(s) of MainComponents

VOL001/SYS001 OldhamCivic Centre

Main fluid chiller with remote heat exchangers servingAHUs distributed around the building, AHUs in theCrompton and Lees Suites with DX heat exchangers,Concealed perimeter Versatemp system and aMitsubishi triple system in the main reception.

R407C R410A 1977 1998 2005 2009

I certify that the above sub systems have been inspected in accordance with the approved methodology

Air Conditioning Inspection Report

RRN: 0350-0157-9579-2909-1002 Page 1 of 162

Site DetailsSite Address(where inspection was carried out)

Civic Centre, West Street, OLDHAM, OL1 1UT

City OLDHAM Postcode OL1 1UT RRN 0350-0157-9579-2909-1002 Related RRN 0192-0199-7960-3500-5703

Report InformationInspection Date 2013-01-07 Issue Date 2013-01-13 UPRN 527511990000

Assessor DetailsAssessor Name Stephen Morgan Assessor ID STER000293

Employer/Trading Name Wensley & Lawz Ltd

Employer/Trading Address National Westminster Building, 116-118 Walsgrave Road, Coventry, CV2 4ED

Accreditation Scheme Name Sterling Accreditation Limited


RRN: 0350-0157-9579-2909-1002 Page 2 of 162

Executive SummaryThis report has been prepared in accordance with Part 4 of the Energy Performance of Buildings (Certificates and Inspections) (England and Wales) Regulations 2007, which implementsArticle 9 of the Energy Performance of Buildings Directive. The inspection has been carried out by an Accredited Air Conditioning Assessor using the Department for Communities and LocalGovernment approved inspection and reporting methodology

The air conditioning systems inspected at this site have been found to conform to the minimum level of energy efficiency prescribed by the CIBSE TM44 methodology.

This report is to consider the status of air conditioning equipment against the requirements of the Energy Performance of Buildings (Certificates and Inspections) (England and Wales)Regulations 2007 which mandate for period inspections aimed at optimizing energy efficiency.

This report should be retained as evidence that the required inspection has been undertaken, and it is recommended that consideration be given to implementing the report’s recommendationsaimed at reducing energy consumption.

All systems were inspected in as much detail as possible according to CIBSE TM44 conventions. The systems were found to be generally in a good state of repair without any significantmaterial defects unless stated otherwise in this report.

The building was constructed using bricks, blocks and stone construction in 1977 and comprises of a ten storey tower and a connecting three storey building. The core activities within thebuilding relate to an office but as it is a council civic centre there are meeting rooms, council chamber and the Queen Elizabeth Hall. The occupancy hours are generally between 07:00 to 18:30Monday to Friday the council chamber and the Queen Elizabeth Hall are occupied as required. The conditioned area can accommodate approximately 700 occupants. Based upon some basicsite measurements the complex comprises a net conditioned area of approximately 9900m2.

The building has two Climate 420kW screw chillers connected to three roof mounted fan assisted heat exchangers which serve seven AHUs. The AHUs are located in the Tower, QueenElizabeth Hall, Council Chamber, Chadderton & Failsworth Suite, Rochdale Road Offices, Foyer & Workshops and the Bar & Offices. The Crompton and Lees Suites also have AHUs which areindependently served by either Mitsubishi or Axair DX units. The AHUs are all located in plant rooms around the building and are connected to the conditioned areas by a series of insulatedductwork and terminal grilles. The above system is controlled by a BMS system which can be accessed from the maintenance manager’s office in the workshop area. The Lees Suite has beenpreset locally to a set point of 23 degrees and there is no method of on-site alteration. The Rochdale Road offices also have 120 versatemp units positioned around the perimeter of these officesthese are concealed units with individual controllers. The versatemp systems works independently of the AHU system in the same area so there could be a possibility of simultaneous heatingand cooling, it is therefore recommended that the versatemp's are altered to be controlled from the BMS. The main reception has an independent Mitsubishi Heavy Industries system connectedto three cassette type terminal units.

At the time of the inspection the Bar & Offices AHU was not operational due to a faulty heat exchanger and the access to the Versatemp's was limited due to renovation works which wereunderway and that the offices that had been refurbished the units were still covered by the warranty of the main contractor.

The total calorific output is 940kW. All systems were available to be operated within the control environment and assessed as part of the EPBD requirements.

The client did not issue a lot of documentation prior to the site visit however some information was made available on the day of the visit.

An external refrigeration contractor, LAC Air Conditioning Limited maintains the cooling systems and carryout routine maintenance on a monthly basis. During the inspection records were notmade available. The site has no F-Gas log.


RRN: 0350-0157-9579-2909-1002 Page 3 of 162

Executive SummarySampling Methodology

Two Climate Screw chillers, Three Mitsubishi DX units, Three Axair DX units, One Mitsubishi Heavy Industries split system with three cassette terminal units, Nine AHUs, Three Versatemp unitsand five grille terminal units. One BMS and one Mitsubishi Heavy Industries wall mounted controller were selected to be inspected.

Cooling Loads Rule of Thumb

Cooling loads for different types of building (W/m2 gross internal area, unless otherwise stated)Description Cooling load (W/m2)Banks 160Data centres 1500Hotels 150Offices 100-160Restaurants 200Retail establishments 140Residential buildings 70Based on the 5th edition of BSRIA’s Rules of thumb – Guidelines for building services


RRN: 0350-0157-9579-2909-1002 Page 4 of 162

Key Recommendations:

Advice and comments on the efficiencies of the AC sub system(s)

When replacing the AHU drive motors in the future the client should ensure that the latest high specification motors are procured.

It is recommended that as part of the PPM all drive belts should be regularly checked utilising a tensioning tool and setting to correspond with the manufacturer’s literature. It is alsorecommended that the pulley grooves are inspected to check for excessive wear. Both these simple checks could reap savings of over 5% of motor power by taking early corrective action.

It is recommended that options of installing run around coils are investigated for the AHUs that have the supply and exhaust air stream located in nearby areas. It is not always practical torecover this energy due to the actual application/current supply and exhaust arrangements, but in some cases a simple run around coil arrangement could recover up to 60% of this energy. Thisenergy is then transferred back into the supply stream reducing heating loads in winter and possibly cooling loads during peak summer weather. The operation of these systems must be linkedback into a unit controller or BMS to ensure that true savings are realised.

Many plants are now assessing the potential energy saving possibilities from introducing new low energy filters. With ever increasing attention being paid to energy consumption many of thefilter manufacturers have invested in research to improve air quality whilst reducing pressure loss across the filters. This enables them to work for long periods before they require to be changed.With a large amount of energy required to power the AHU motors, small reductions in system static pressure will lead to an overall reduction in energy consumption.

An option of night purging should be further investigated. This is when the cooler external evening air is circulated within the building there by cooling the building fabric thus reducing peakbuilding cooling loads. By utilising the cheaper night electricity tariff the cost of operating the AHU will be minimised offering greater fiscal savings. The BMS strategy must ensure that hold-offsare placed upon the cooling plant and boiler.

It is recommended that the possibility of DCV be considered. Demand-controlled ventilation (DCV) using carbon dioxide (CO2) sensing is a combination of two technologies: CO2 sensors thatmonitor CO2 levels in the air inside a building, and an air-handling system that uses data from the sensors to regulate the amount of ventilation air admitted. CO2 sensors continually monitorthe air in a conditioned space. Given a predictable activity level, such as might occur in an office, people will exhale CO2 at a predictable level. Thus CO2 production in the space will veryclosely track occupancy. Outside CO2 levels are typically at low concentrations of around 400 to 450 ppm. Given these two characteristics of CO2, an indoor CO2 measurement can be used tomeasure and control the amount of outside air at a low CO2 concentration that is being introduced to dilute the CO2 generated by building occupants. The result is that ventilation rates can bemeasured and controlled to a specific cfm/person based on actual occupancy. This is in contrast to the traditional method of ventilating at a fixed rate regardless of occupancy.

At present the fan assemblies in AHU VOL001/SYS001/AHU2, 3, 4, 5, 6, 7, 8 & 9 are all fixed speed. The introduction of variable speed drives to the AHU motors and improved overall unitcontrols back to the BMS would see significant reduction in energy consumption by the AHU. It is recommended that the client should investigate further the option of installing variable speeddrives with dynamic control based on system pressures via floor supply dampers or from additional CO2 sensors. A 10% reduction in fan speed could lead to energy savings of over 25%.

When replacing the AHU drive motors in the future the client should ensure that the latest high specification motors are procured.

A thermal wheel consists of a circular honeycomb matrix of heat-absorbing material, which is slowly rotated within the supply and exhaust air streams of an air handling system. As the thermalwheel rotates heat is picked up from the exhaust air stream in one half of the rotation, and given up to the fresh air stream in the other half of the rotation. Thus waste heat energy from theexhaust air stream is transferred to the matrix material and then from the matrix material to the fresh air stream, raising the temperature of the supply air stream by an amount proportional to thetemperature differential between air streams, or 'thermal gradient', and depending upon the efficiency of the device. The airstreams must be flowing in opposite directions or no beneficial heatexchange can occur. The principle of course works in reverse and 'coolth' energy can be recovered to the supply air stream if so desired and the temperature differential allows.


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Key Recommendations:It is recommended that the flexible joint in the Council Chamber AHU be replaced to reduce air leakage.

Advice and comments on the maintenance of the AC sub system(s)

The refrigerant pipework insulation on cooling plant VOL001/SYS001/CP1 & 2 has numerous gaps and is perished in places which will reduce system performance and energy efficiency. It isrecommended that all pipework is inspected and damaged insulation is either repaired or replaced.


AHU VOL001/SYS001/AHU1 filters were dirty, it is recommended that the filters in the AHU be replaced urgently then monitored to assess an appropriate frequency to change them in thefuture.

It is recommended that the AHU filters are changed or cleaned every 3 months in line with current industry guidelines, or when the static pressure is twice that of the clean filter pressure.

It is recommended that the rear access panel on the QE Hall AHU be repaired and the heat exchanger be chemically cleaned.

It is recommended that the maintenance provider investigates why the filter pressure gauge is not working on the QE Hall AHU.

The Council Chamber AHU had a fluid filled manometer that was not working due to a lack of fluid. It is recommended that the fluid be replenished and maintained that way and the next time thenew filters are fitted the gauge should be marked to indicate the good air flow position. This will aid in the identification of increased static pressure due to filters being blocked.

A thorough examination of all ductwork should take place regularly in accordance with DW143-HVCA Practical Guide to Ductwork Leak Testing and any repairs should be carried out. Ductleakage can waste a significant amount of energy in HVAC systems. Measures for reducing duct leakage include installing duct installation and performing regular duct inspection andmaintenance, including routine leak detection and repair. Repairing duct leaks in industrial and commercial spaces can reduce HVAC energy consumption by up to 30%.

It is recommended that the exhaust damper linkage on the Lees Suite AHU be repaired as it was broken at the time of the inspection.

It is recommended that the Varsatemp return air filters are cleaned and the maintenance frequency reviewed.

Advice and comments on the control of AC sub system(s)

Simple instructions in the form of a notice can be a very easy way to ensure that employees are made aware of bad practices that can lead to excessive energy waste from space conditioningequipment. Consider mounting guidance notes in a prominent position near terminals and controls advising occupants to be wary of operating the system whilst windows are open, heating is on,or when the room is unoccupied. Also advise on a suitable temperature setting.

It is recommended that the client introduces summer, winter and autumn/spring set-points/operating conditioning to minimise energy waste. The winter set-points should be between 19°C and20°C with the unit set to heating only mode and summer set-points of 23°C to 24°C operating in cooling only mode. Due to the fluctuating external conditioning during spring/autumn the option


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Key Recommendations:of utilising auto mode would ensure that set-points (21°C - 22°C) are satisfied with minimal adjustments required to the controllers. From previous Carbon Trust studies it is recommended thatwhen heat pumps are in cooling mode that they are set to maintain 24°C, with an estimated saving of 4% on annual system running costs for every 1K increase in cooling set-point temperature.

It is recommended that the client introduces summer, winter and autumn/spring set-points/operating conditioning to minimise energy waste. The winter set-points should be between 19°C and20°C with the unit set to heating only mode and summer set-points of 23°C to 24°C operating in cooling only mode. Due to the fluctuating external conditioning during spring/autumn the optionof utilising auto mode would ensure that set-points (21°C - 22°C) are satisfied with minimal adjustments required to the controllers. From previous Carbon Trust studies it is recommended thatwhen heat pumps are in cooling mode that they are set to maintain 24°C, with an estimated saving of 4% on annual system running costs for every 1K increase in cooling set-point temperature.

Advice and comments on the management of AC sub system(s)

The building has a main fiscal electricity meter with no additional sub-metering and a natural gas meter for the heating and domestic hot water services. With the creation of a Building Log Bookand improved smart metering future inspections will be able to provide specific energy savings with simple payback periods.

There was no F-Gas Log Book available on site for the cooling plant. As this plant has a refrigeration system with refrigerant charges in excess of 3kg it is a legal requirement to demonstratecompliance with F-Gas regulations. An F-Gas Log Book may exist with the refrigeration contractor; this should be checked and preferably kept on site. F–Gas/HCFC Regulations: For systemson site that have a refrigerant charge of over 3kg the client must ensure that an F-Gas Log Book is created for each system, see below for further details. The client should also considerincluding within this scope of work all non-hermetic systems containing refrigerant charge greater than 0.5kg. The Kyoto protocol is due to be renewed in 2012 and the inter-governmental panelare already considering introducing a limitation on the level of Global Warming Potential (GWP) of the latest HFC refrigerants similar to that being introduced by the European Union regardingautomotive air conditioning that will limit refrigerants used in these systems to 150kgCO2 GWP100a. As part of the industry’s response to potentially new restrictions the UK Government is‘considering’ lowering the minimum trigger limit for F-Gas inspections to 500g, so by introducing these check/logs now the client will already be compliant. Some contractors are now compilingan additional Indirect Leak Testing Report to complement the F-Gas Log Book. It is recommended that a similar approach is taken at this site and the following system parameters are collectedto form part of the Indirect Leak Testing Report:

To improve future inspections it is recommended that a Building Log Book is created and that all the major plant design details/controls are listed. As part of the latest Building Regulations PartL 2010 the provision of a Building Log Book is now law for new buildings and existing buildings that have undergone major refurbishment work. It is designed to give the facilities team a singledocument that covers the general operation of the HVAC plant at design/commissioning stage with information to enable the team to optimise the system controls to ensure that the internalenvironmental conditions meet the requirements of the building users whilst optimising the operations to ensure that energy consumption is minimised. The document should also includeinformation to enable the operator to record energy consumption of the building/services to enable a comparison against the design benchmark data.

It is recommended that the maintenance contractor be called to attend site and pressure test the system and repair the leakage on VOL001/SYS001/CP1.


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Sub System IndexVolume Definitions VOL001

Sub System ID VOL001/SYS001 Oldham Civic Centre

Sub System Description Main fluid chiller with remote heat exchangers serving AHUs distributed around the building, AHUs in the Crompton and Lees Suites with DXheat exchangers, Concealed perimeter Versatemp system and a Mitsubishi triple system in the main reception.

Effective Rated Cooling Output of Sub System(kW)

940

Sub System Area Served Tower, Chadderton suite, Failsworth suite, Foyer & Workshop, Bar & Offices, Queen Elizabeth hall, Rochdale road offices, Council chamber,Crompton Suite, Lees Suite and main reception

Inspection Date 2013-01-07

Cooling Plant Count 9

AHU Count 7

Terminal Units Count 250

Sub System Controls Count 2


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Note: Request the following information from client and complete the following checklist. The assessor should examine the relevant documentation and systems as far as possible to checkthat the installed equipment is as described. If the documentation is not available, then an additional part of this procedure is to locate the equipment and assemble a portfolio of relevantdocumentation which should include all ‘Essential’ items as a minimum.

Record Checklist Pre Inspection InformationLevel Information Required Reviewed Not Available

Itemised list of installed air conditioning and refrigeration plant including product makes, models andidentification numbers.

[ ] [x]

Cooling capacities, with locations of the indoor and outdoor components of each plant. [ ] [x]

Description of system control zones, with schematic drawings. [ ] [x]

Description of method of control of temperature. [ ] [x]

Description of method of control of periods of operation. [ ] [x]

Essential

Floor plans and schematics of air conditioning systems. [ ] [x]

Reports from earlier inspections of air conditioning systems, and for the generation of an energyperformance certificate.

[ ] [x]

Records of maintenance operations carried out on refrigeration systems, including cleaning indoor andoutdoor heat exchangers, refrigerant leakage tests, repairs to refrigeration components replenishing withrefrigerant.

[ ] [x]

Records of maintenance operations carried out on air delivery systems, including filter cleaning andchanging, and cleaning of heat exchangers.

[ ] [x]

Records of calibration and maintenance operations carried out on control systems and sensors, or BMSsystems and sensors.

[ ] [x]

Records of sub-metered air conditioning plant use or energy consumption. [ ] [x]

Desirable

For relevant air supply and extract systems, commissioning results of measured absorbed power at normalair delivery and extract rates, and commissioning results for normal delivered delivery and extract air flowrates (or independently calculated specific fan power for the systems).

[ ] [x]

An estimate of the design cooling load for each system (if available). Otherwise, a brief description of theoccupation of the cooled spaces, and of power consuming equipment normally used in those spaces.

[ ] [x]

Records of any issues or complaints that have been raised concerning the indoor comfort conditionsachieved in the treated spaces.

[ ] [x]

Optional

Where a BMS is used the manager should arrange for a short statement to be provided describing itscapabilities, the plant it is connected to control, the set points for the control of temperature, the frequencywith which it is maintained, and the date of the last inspection and maintenance.

[ ] [x]


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Record Checklist Pre Inspection InformationLevel Information Required Reviewed Not Available

Where a monitoring station, or remote monitoring facility, is used to continually observe the performanceof equipment such as chillers, the manager should arrange for a statement to be provided describing theparameters monitored, and a statement reviewing the operating efficiency of the equipment.

[ ] [x]


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Cooling Plant Equipment InspectedUnit Identifier VOL001/SYS001 Oldham Civic Centre

Component Identifier VOL001/SYS001/CP1 Chiller 1

Manufacturer Climate

Description (type/details) 1998

Model/Reference CCU 3.50CYEZ

Serial Number BC980397A

Year Plant Installed 1998

Rated Cooling Capacity (kW) 420

Refrigerant Type R407C

Refrigerant Charge (kg) 180

Location of Cooling Plant Boiler room of the tower

Areas/Systems Served AHUs located in the Tower, QE Hall, Foyer & W/shop, Bar & Offices, Chadderton/Failsworth Suite, Council Chamber and Rochdale road offices

Note below any discrepancy between information provided by client and on site information collected, or any information of additional relevance to the cooling plant/system:No documentation was provided prior to the inspection to enable checking to take place and no documentation was available on site.


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This section applies to the following unit: VOL001/SYS001/CP1 Chiller 1

Cooling Plant Equipment Visual InspectionItem Ref Inspection Item Finding Notes and Recommendations

CS2.1 Is the refrigeration plant operational? Yes [x] No [ ] The cooling plant was fully operational at the time of the inspection.

CS2.2/a Is the area around the refrigeration plant clearof obstructions & debris?

Yes [x] No [ ] The area around the cooling plant is clear of debris and obstructions.

CS2.2/b Is the general condition of refrigeration andany associated central plant in good order?

Yes [x] No [ ] The condition of the cooling plant was consistent with its age and shows the maintenance works are beingcompleted.

CS2.2/c Is the condenser placed clear from warm airdischarge louvres?

Yes [x] No [ ] The cooling plant has been positioned away from any external heat sources.

CS2.3/a Are compressors operational or can they bebrought into operation?

Yes [x] No [ ] The cooling plant was fully operational at the time of the inspection.

CS3.1/a Is the heat rejection plant operational? Yes [x] No [ ] The cooling plants heat rejection system was fully operational at the time of the inspection.

CS3.1/b Are condenser heat exchangers undamaged/un-corroded and clean?

Yes [x] No [ ] The cooling plant heat exchanger(s) were clean and free on major obstructions and debris; there were no signsof corrosion.

CS3.2/a Is the area around the heat rejection plantclear of obstructions & debris?

Yes [x] No [ ] The air paths onto and from the cooling plant were free of major obstructions, debris and presented norestrictions to the air flow.

CS3.2/b Is the condenser free of any possibility of airrecirculation?

Yes [x] No [ ] There was free air movement through the area and no issues with regards to air starvation or recirculation to thecooling plant.


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CS4.1 Is the insulation on circulation pipe work wellfitted and in good order?

Yes [ ] No [x] The cooling plant insulation has a few gaps which need to be addressed.

The refrigerant pipework insulation on cooling plant VOL001/SYS001/CP1 has numerous gaps and is perishedin places which will reduce system performance and energy efficiency. It is recommended that all pipework isinspected and damaged insulation is either repaired or replaced.


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Cooling Plant Detailed Inspection NotesItem Ref Item Inspection Item Finding Notes and Recommendations

Refrigerant Type R407CCS1.1 RefrigerantUsed Montreal/ODS/F-Gas

controlled?Yes [ ] No [x]

Refrigerant R407C see recommendations

There was no F-Gas Log Book available on site for the coolingplant VOL001/SYS001/CP1. As this plant has a refrigerationsystem with refrigerant charges in excess of 3kg it is a legalrequirement to demonstrate compliance with F-Gas regulations.An F-Gas Log Book may exist with the refrigeration contractor;this should be checked and preferably kept on site. F–Gas/HCFC Regulations: For systems on site that have a refrigerantcharge of over 3kg the client must ensure that an F-Gas LogBook is created for each system, see below for further details.The client should also consider including within this scope ofwork all non-hermetic systems containing refrigerant chargegreater than 0.5kg. The Kyoto protocol is due to be renewed in2012 and the inter-governmental panel are already consideringintroducing a limitation on the level of Global Warming Potential(GWP) of the latest HFC refrigerants similar to that beingintroduced by the European Union regarding automotive airconditioning that will limit refrigerants used in these systemsto 150kgCO2 GWP100a. As part of the industry’s response topotentially new restrictions the UK Government is ‘considering’lowering the minimum trigger limit for F-Gas inspections to 500g,so by introducing these check/logs now the client will already becompliant. Some contractors are now compiling an additionalIndirect Leak Testing Report to complement the F-Gas LogBook. It is recommended that a similar approach is taken atthis site and the following system parameters are collected toform part of the Indirect Leak Testing Report: • Internal RoomTemperature (°C) A • Controller Set-Point (°C) • Evaporator Airoff Temperature (°C) B • Internal Air Temperature Difference(K) A - B • Suction Pressure (Bar) • Suction Line Temperature(°C) • Discharge Pressure (Bar) • Liquid Line Temperature (°C)• Compressor Discharge Temperature (°C) • Condenser Airoff Temperature (°C) C • Ambient Air Temperature (°C) D •External Air Temperature Difference (K) C – D • CompressorRunning Amps (per Phase) • Notes regarding system capacitycontrol, i.e. low load conditions condenser fan at low speed.


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It is also recommended that a copy of the unit’s O&M manualis also included with the F-Gas Check Sheet to form partof the overall equipment F-Gas Log Book. From other sitesvisited facilities teams have taken copies of the refrigerationengineers’ certificate and then coded each engineer. When anywork is undertaken on site regarding the primary refrigerantthis engineer code is used on the log book to show that onlyqualified engineers have broken into the refrigeration systems.By maintaining an up to date F-Gas Log Book the client willalso be able to use this data for any future carbon footprintingwork to included lost refrigerant charges under Scope 1 FugitiveEmissions.

CS1.3 RegularMaintenance

Is there evidence of regular maintenance? Yes [x] No [ ] There was no on site documentation available to reviewregarding the maintenance of the cooling plant. This shouldbe addressed preferably by the development of a Building LogBook this will improve future inspections.

To improve future inspections it is recommended that a BuildingLog Book is created and that all the major plant design details/controls are listed. As part of the latest Building RegulationsPart L 2010 the provision of a Building Log Book is now lawfor new buildings and existing buildings that have undergonemajor refurbishment work. It is designed to give the facilitiesteam a single document that covers the general operation of theHVAC plant at design/commissioning stage with information toenable the team to optimise the system controls to ensure thatthe internal environmental conditions meet the requirementsof the building users whilst optimising the operations to ensurethat energy consumption is minimised. The document shouldalso include information to enable the operator to record energyconsumption of the building/services to enable a comparisonagainst the design benchmark data. The Building Log Bookshould cover the following: Building Summary – This coversthe key data relating to the building design, general overview ofHVAC plant and other services, to give the reader a strategicunderstanding of how the building was designed to operate.


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Reference Point – This should list the key building energyinformation, with links to supporting documents held in the mainoperational and maintenance manuals and commissioningrecords. Source of Information – It should be designed to holdall the key information required for any persons involved in thedaily operation of the building and to contractors carrying outservice work. Dynamic Document – A log should be maintainedto list all the changes that relate to structure, activities of internalspaces and operational hours. By maintaining the annual energyrecords the manager will be able to review the operation ofthe various services that are sub-metered. Display EnergyCertificates - As part of the government’s commitment toreducing carbon emissions as part of current EU legislation onearea of on-going discussion is the introduction of Display EnergyCertificates (DEC) for non-public buildings that will requireowners/operators to display an annual energy operational rating.This will be publically accessible from a central database. Bymaintaining a current Building Log Book the information requiredto complete this work would be held in one central location.Building Energy Metering - The current Building Regulationsnow set requirements for introducing smart sub-metering in newbuildings so that facilities managers can account for at least90% of energy via metering. As part of any major refurbishmentwork the contractors must also consider introducing new meters,this has seen the introduction of minimum equipment ratedpower inputs requiring additional sub-metering, with a currentlevel of 20kW for chiller equipment. Further guidance can befound in CIBSE Guide TM39 – Building Energy Metering.

Is the maintenance undertaken by suitablycompetent people and in accordance toindustry guidelines?

Yes [x] No [ ] The maintenance provider was checked against the F-Gasdatabase and they are suitably competent. REF1005038

Following Information Required:CS1.4CL1.1

AppropriatelySized CoolingPlant

Total Occupants served by this plant 350

Building Regulations Approved Document Part L 2nd tierdocumentation provides guidance suggesting that the plantshould not be more than 20% oversized. This should be adoptedas means of comparison to stay in line with current standards.


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Total Floor Area served by thisplant(m²)

4952

Occupant Density (m²/person) 14.15

Maximum Instantaneous Heat Gain(W/m²)

100.0

Installed Cooling Capacity (kW) 420.0

The Installed Size is Deemed:

More than ExpectedLess than ExpectedAs Expected

[ ][ ][x]

This figure can change day to day.

The maximum instantaneous heat gain was taken from theCIBSE TM44 2012 rules of thumb guidelines. Area 4952 x 0.1 =495.2kW and 420kW installed, the system would seem to havethe correct duty.

The cooling plant is adequately sized to suit the load based onthe floor area multiplied by the maximum instantaneous heatgain (W/m2).

Yes [ ] No [x]Is metering installed to enable monitoring ofenergy consumption of refrigeration plant?

Recorded meter reading

Is the refrigeration plant connected to a BEMSthat can provide out of range alarms?

Yes [x] No [ ] The cooling plant is monitored by a BEMS system whichdisplays an alarm when the plant goes into an alarm situation.

Are there any records of air conditioning plantusage or sub-metered energy consumptionwith expected hours of use per year for theplant?

Yes [ ] No [x] There was no on site documentation available to review.

CS1.6 MeteringComparisonto appropriateenergybenchmarks

Is the energy consumption or hours of useexcessive?


CS2.2/d RefrigerationLeaks

Are there any signs of a refrigerant leak? Yes [x] No [ ] A sweep of the vicinity of the unit was carried out using anelectronic refrigerant leak detector and a refrigerant leak wasdetected on the discharge service valve.


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It is recommended that the maintenance contractor be called toattend site and pressure test the system and repair the leakageon VOL001/SYS001/CP1.

Refrigeration Temperature:

Pre Compressor(°C) 12

Post Compressor(°C) 62

Ambient(°C) 8

The Temperature is Deemed:


[ ][ ][x]

The temperature reading was taken using an electronicthermometer.



The temperature difference across the compressor compared tothe ambient temperature is as expected.

CL1.3 Refrigeration

Assess the refrigeration compressor(s) and themethod of refrigeration capacity control

The cooling plant has multiple compressorswhich are brought into operation as the loadincreases each have variable load capabilities.

Is the water flow through cooling towers orevaporative coolers even and efficient, andthere is no loss of water?

Yes [ ] No [x] The cooling plant does not have a cooling tower as part of thesystem.

CS3.5 Water CooledChillers(Cooling Towers& EvaporativeCondensers) Is there a management regime in place to

ensure that water is regularly checked andtreated to ensure that there is no Legionellarisk?


HumidityControl

Is there separate equipment installed forhumidity control?

Yes [ ] No [x] The cooling plant does not have a humidifier as part of thesystem.


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Component Identifier VOL001/SYS001/CP2 Chiller 2

Manufacturer Climate


Model/Reference CCU 3.50CYEZ

Serial Number BC980397B





Location of Cooling Plant Boiler room of the tower

Areas/Systems Served AHUs located in the Tower, QE Hall, Foyer & W/shop, Bar & Offices, Chadderton/Failsworth Suite, Council Chamber and Rochdale road offices



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This section applies to the following unit: VOL001/SYS001/CP2 Chiller 2



















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Yes [ ] No [x] The cooling plant insulation has a few gaps which need to be addressed.

The refrigerant pipework insulation on cooling plant VOL001/SYS001/CP2 has numerous gaps and is perishedin places which will reduce system performance and energy efficiency. It is recommended that all pipework isinspected and damaged insulation is either repaired or replaced.


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4952



100.0




[ ][ ][x]


The maximum instantaneous heat gain was taken from theCIBSE TM44 2012 rules of thumb guidelines. Area 4952 x 0.1 =495.2kW and 420kW installed, the system would seem to havethe correct duty.

The cooling plant is adequately sized to suit the load based onthe floor area multiplied by the maximum instantaneous heatgain (W/m2).











Are there any signs of a refrigerant leak? Yes [ ] No [x] A sweep of the vicinity of the unit was carried out using anelectronic refrigerant leak detector and no refrigerant leakage


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was detected. There was no visual evidence of refrigerantleakage although only access covers were removed.





Ambient(°C) 8



[ ][ ][x]





CL1.3 Refrigeration


The cooling plant has multiple compressorswhich are brought into operation as the loadincreases each have variable load capabilities.







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HumidityControl




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Component Identifier VOL001/SYS001/CP3 Crompton Suite

Manufacturer Mitsubishi


Model/Reference PUHZ-P125VHA3

Serial Number 9C00293



Refrigerant Type R410A


Location of Cooling Plant Basement Car park

Areas/Systems Served Crompton Suite



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This section applies to the following unit: VOL001/SYS001/CP3 Crompton Suite



















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Yes [x] No [ ] The cooling plant insulation was in good condition with no deterioration.


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Refrigerant Type R410ACS1.1 RefrigerantUsed Montreal/ODS/F-Gas


Refrigerant R410A see recommendations



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62



160.0




[x][ ][ ]


The maximum instantaneous heat gain was taken from theCIBSE TM44 2012 rules of thumb guidelines. Area 62 x 0.16 =9.92kW and 12.5kW installed, the system would seem to havemore duty than expected.

Although a degree of over or under sizing is not unusual forcooling plants, it should be noted that the estimated coolingload is based on a ‘rule of thumb’ and may not reflect the actualcooling load. It is normally acceptable for a margin of error of±20% as per the latest guidelines from CIBSE.




Yes [ ] No [x] It is recommended that the cooling system be installed with aremote monitoring system for potential alarms.









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Ambient(°C) 8



[ ][ ][x]





CL1.3 Refrigeration


The cooling plant compressor is inverter drivenand can run at part load.






HumidityControl




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62



160.0




[x][ ][ ]
















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Ambient(°C) 8



[ ][ ][x]





CL1.3 Refrigeration








HumidityControl




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Yes [ ] No [x] The cooling plant was fully operational at the time of the inspection but the ambient conditions prevented thesystem from running.

CS3.1/a Is the heat rejection plant operational? Yes [ ] No [x] The cooling plants heat rejection system was fully operational at the time of the inspection but the ambientconditions prevented the system from running.








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62



160.0




[x][ ][ ]
















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Ambient(°C) 8



[ ][ ][x]





CL1.3 Refrigeration








HumidityControl




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Component Identifier VOL001/SYS001/CP6 Lees Suite

Manufacturer Axair


Model/Reference MOU-48HN2

Serial Number 1040700005






Areas/Systems Served Lees Suite



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This section applies to the following unit: VOL001/SYS001/CP6 Lees Suite



















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62



160.0




[x][ ][ ]


The maximum instantaneous heat gain was taken from theCIBSE TM44 2012 rules of thumb guidelines. Area 62 x 0.16= 9.92kW and 14kW installed, the system would seem to havemore duty than expected.














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Ambient(°C) 8



[ ][ ][x]





CL1.3 Refrigeration








HumidityControl




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Manufacturer Axair












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Yes [ ] No [x] The cooling plant was fully operational at the time of the inspection but the ambient conditions prevented thesystem from running.

CS3.1/a Is the heat rejection plant operational? Yes [ ] No [x] The cooling plants heat rejection system was fully operational at the time of the inspection but the ambientconditions prevented the system from running.








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62



160.0




[x][ ][ ]
















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Ambient(°C) 8



[ ][ ][x]





CL1.3 Refrigeration








HumidityControl




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Manufacturer Axair












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62



160.0




[x][ ][ ]
















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Ambient(°C) 8



[ ][ ][x]





CL1.3 Refrigeration








HumidityControl




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Component Identifier VOL001/SYS001/CP9 Main Reception

Manufacturer Mitsubishi HI


Model/Reference FDC200VS

Serial Number F22001145RF






Areas/Systems Served Main Reception



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This section applies to the following unit: VOL001/SYS001/CP9 Main Reception






Yes [ ] No [x] The condition of the cooling plant was consistent with its age and shows the maintenance works are beingcompleted however, the system is leaking water onto the car park floor.














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162



100.0




[x][ ][ ]
















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Ambient(°C) 8



[ ][ ][x]





CL1.3 Refrigeration








HumidityControl




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Air Handling Systems:Note: For safety reasons, it will be necessary for air handling fans in air distribution systems to be turned off in order to gain access inside air handlers or ductwork to examine components suchas fans, drives, filters, heat exchangers and control dampers. The building manager should arrange safe access for the inspector.

Air Handling Systems Equipment InspectionUnit Identifier VOL001/SYS001 Oldham Civic Centre

Component Identifier VOL001/SYS001/AHU1 Tower

Systems Served from Cooling Plant VOL001/SYS001/CP1 Chiller 1

Manufacturer Custom Built

Year Systems Installed 1977

Location of Plant Roof Level Plant Room

Areas / Systems Served Tower

Note below any discrepancy between information provided by client and on site information collected, or any information of additional relevance to the AHU/system:

No documentation was provided prior to the inspection to enable checking to take place and no documentation was available on site. Supply 1.88m/s x (3.05 x 3.08) = 17.66m3/s 45kW +42.5kW + 42.5kW= 130 x 70% = 91kW 91/17.66 = 5.15SFP


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This section applies to the following unit:VOL001/SYS001/AHU1 Tower

Air Handling Systems Equipment Inspection NotesItem Ref Item Inspection Item Finding Notes and Recommendations

Estimate the specific fan power (SFP) of airmovement systems

Building Regulations Approved Document Part F and Part L 2nd tier documentation provideguidance on limiting values. This should be adopted as means of comparison to stay inlinewith current standards.

CS1.5 Specific FanPower

Are air flow rates and system pressuresavailable from commissioning data?

Yes [ ] No [x]

SFP Calculation:5.15

No documentation was provided prior to the inspection to check.

Are air intake and filter conditions acceptable? Yes [ ] No [x] The air filters are very dirty which will intern effect the efficiency of the AHU drive motor.

AHU VOL001/SYS001/AHU1 filters were dirty, it is recommended that the filters in the AHUbe replaced urgently then monitored to assess an appropriate frequency to change them inthe future.

CS6.1CS6.2

Have filters been changed according to currentindustry guidance

Yes [ ] No [x] There was no documentation on site to say when the filters were changed.

It is recommended that the AHU filters are changed or cleaned every 3 months in linewith current industry guidelines, or when the static pressure is twice that of the clean filterpressure.

CS6.3

Filters

Is the filter differential pressure gauge, wherefitted, working?

Yes [ ] No [x] No pressure differential gauges were fitted to the plant

CS6.5 Conditionof HeatExchangers

Are heat exchangers in good condition? Yes [x] No [ ] The AHU heat exchanger coil was in a good state of repair given their age with no majordamage noted on the accessible coil faces.

CS6.6 RefrigerationLeaks (if DXCoilInstalled)

Are there any signs of a refrigerant leak? Yes [ ] No [x] A sweep of the vicinity of the units was carried out using an electronic refrigerant leakdetector and no refrigerant leakage was detected. There was no visual evidence of refrigerantleakage although no covers were removed.

CS6.7/a Fan Rotation Does the fan rotate in the correct direction? Yes [x] No [ ] A visual inspection was carried out to ensure the fan rotation was correct.


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Is the speed control or modulation operational? Yes [x] No [ ] VAV blades which can be adjusted.

CS6.7/b Fan & Control Note the fan type, and method of air speedcontrol.Check the setting and operation of any freshair/recirculation dampers.

The AHU hasdirect drive inlinefans with VAVblades.

CS6.8 Heat Recovery Identify whether the systems have any energyconservation facilities, e.g. heat recovery, freecooling sequence, and check for evidence thatsuch facilities are/have been functioning.

None It is recommended that options of installing run around coils are investigated for the AHUsthat have the supply and exhaust air stream located in nearby areas. It is not always practicalto recover this energy due to the actual application/current supply and exhaust arrangements,but in some cases a simple run around coil arrangement could recover up to 60% of thisenergy. This energy is then transferred back into the supply stream reducing heating loadsin winter and possibly cooling loads during peak summer weather. The operation of thesesystems must be linked back into a unit controller or BMS to ensure that true savings arerealised. Many plants are now assessing the potential energy saving possibilities fromintroducing new low energy filters. With ever increasing attention being paid to energyconsumption many of the filter manufacturers have invested in research to improve air qualitywhilst reducing pressure loss across the filters. This enables them to work for long periodsbefore they require to be changed. With a large amount of energy required to power theAHU motors, small reductions in system static pressure will lead to an overall reduction inenergy consumption. An option of night purging should be further investigated. This is whenthe cooler external evening air is circulated within the building there by cooling the buildingfabric thus reducing peak building cooling loads. By utilising the cheaper night electricitytariff the cost of operating the AHU will be minimised offering greater fiscal savings. TheBMS strategy must ensure that hold-offs are placed upon the cooling plant and boiler. Athermal wheel consists of a circular honeycomb matrix of heat-absorbing material, whichis slowly rotated within the supply and exhaust air streams of an air handling system. Asthe thermal wheel rotates heat is picked up from the exhaust air stream in one half of therotation, and given up to the fresh air stream in the other half of the rotation. Thus wasteheat energy from the exhaust air stream is transferred to the matrix material and then fromthe matrix material to the fresh air stream, raising the temperature of the supply air streamby an amount proportional to the temperature differential between air streams, or 'thermalgradient', and depending upon the efficiency of the device. The airstreams must be flowing inopposite directions or no beneficial heat exchange can occur. The principle of course worksin reverse and 'coolth' energy can be recovered to the supply air stream if so desired and the


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temperature differential allows. It is recommended that the possibility of DCV be considered.Demand-controlled ventilation (DCV) using carbon dioxide (CO2) sensing is a combinationof two technologies: CO2 sensors that monitor CO2 levels in the air inside a building, and anair-handling system that uses data from the sensors to regulate the amount of ventilation airadmitted. CO2 sensors continually monitor the air in a conditioned space. Given a predictableactivity level, such as might occur in an office, people will exhale CO2 at a predictable level.Thus CO2 production in the space will very closely track occupancy. Outside CO2 levels aretypically at low concentrations of around 400 to 450 ppm. Given these two characteristicsof CO2, an indoor CO2 measurement can be used to measure and control the amount ofoutside air at a low CO2 concentration that is being introduced to dilute the CO2 generatedby building occupants. The result is that ventilation rates can be measured and controlled to aspecific cfm/person based on actual occupancy. This is in contrast to the traditional method ofventilating at a fixed rate regardless of occupancy.

CS6.9 Air Leakage Observe the air handling plant and visible aircontainment including ductwork, floor or ceilingplenums and builders' work shafts for signs ofexcessive leakage and energy loss.

The ductworkappeared to be ina good condition,there were noobvious signsof leakage, allinspected areasappeared to bewell sealed, wellinsulated andfree from airleaks.

A thorough examination of all ductwork should take place regularly in accordance withDW143-HVCA Practical Guide to Ductwork Leak Testing and any repairs should be carriedout. Duct leakage can waste a significant amount of energy in HVAC systems. Measuresfor reducing duct leakage include installing duct installation and performing regular ductinspection and maintenance, including routine leak detection and repair. Repairing duct leaksin industrial and commercial spaces can reduce HVAC energy consumption by up to 30%.

CS7.1CS7.2

Outdoor AirInlets

(a) Locate the inlets for outdoor air.(b) Note any significant obstructions orblockages to inlet grilles, screens and pre-filters.(c) Note where inlets may be affected byproximity to local sources of heat, or to airexhausts.

There were noobstructions tothe inlet grillesand these arenot here any heatsources.


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Component Identifier VOL001/SYS001/AHU2 Chadderton and Failsworth Suite




Location of Plant Plant Room

Areas / Systems Served Chadderton and Failsworth Suite


No documentation was provided prior to the inspection to enable checking to take place and no documentation was available on site. Supply 3.0m/s x (2.02 x 1.28) = 7.76m3/s 7.7kW + 18.5kW= 26 x 70% = 18.2kW 18.2/7.76 = 2.35SFP


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This section applies to the following unit:VOL001/SYS001/AHU2 Chadderton and Failsworth Suite






Yes [ ] No [x]





CS6.1CS6.2




CS6.3

Filters


Yes [x] No [ ] Pressure differential gauges were fitted to the plant and were operational.







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Is the speed control or modulation operational? Yes [x] No [ ] The AHU motors have a fixed operating speed.

At present the fan assemblies in AHU VOL001/SYS001/AHU2 are all fixed speed. Theintroduction of variable speed drives to the AHU motors and improved overall unit controlsback to the BMS would see significant reduction in energy consumption by the AHU. It isrecommended that the client should investigate further the option of installing variable speeddrives with dynamic control based on system pressures via floor supply dampers or fromadditional CO2 sensors. A 10% reduction in fan speed could lead to energy savings of over25%.


The AHU hadcentrifugal fanswith backwardcurved bladesand belt driven 4pole motors.

When replacing the AHU drive motors in the future the client should ensure that the latesthigh specification motors are procured. It is recommended that as part of the PPM all drivebelts should be regularly checked utilising a tensioning tool and setting to correspond withthe manufacturer’s literature. It is also recommended that the pulley grooves are inspected tocheck for excessive wear. Both these simple checks could reap savings of over 5% of motorpower by taking early corrective action.


None Some fan manufacturers have developed further the design of standard centrifugal casesreducing internal losses and improving air distribution from the fan discharge outlet whichhas seen efficiency gains of 2% to 4%. The new generation of direct driven high efficiencycentrifugal fan has an inclined aerofoil hollow bladed backward curved impeller, optimisedto increase the fans peak efficiency and widens the performance band at which the peakefficiency operates. The result is typically 17.5% less energy required to produce the samevolume and pressure characteristic as the previous generation of fan technology. By directcoupling the motor drive to the fan shaft the small additional losses of 3% to 4% associatedwith belt slip and pulley losses will be eliminated. These fan assemblies will offer even greaterenergy saving by improved air distribution through the AHU. Some manufactures of thesmaller range of units offer ‘Plug’ fans complete with Electronically Commutated (EC) fanmotors, these motors will consume on average 20% less than a similar standard AC motor. Itis recommended that options of installing run around coils are investigated for the AHUs thathave the supply and exhaust air stream located in nearby areas. It is not always practical torecover this energy due to the actual application/current supply and exhaust arrangements,but in some cases a simple run around coil arrangement could recover up to 60% of thisenergy. This energy is then transferred back into the supply stream reducing heating loadsin winter and possibly cooling loads during peak summer weather. The operation of these


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systems must be linked back into a unit controller or BMS to ensure that true savings arerealised. Many plants are now assessing the potential energy saving possibilities fromintroducing new low energy filters. With ever increasing attention being paid to energyconsumption many of the filter manufacturers have invested in research to improve air qualitywhilst reducing pressure loss across the filters. This enables them to work for long periodsbefore they require to be changed. With a large amount of energy required to power theAHU motors, small reductions in system static pressure will lead to an overall reduction inenergy consumption. An option of night purging should be further investigated. This is whenthe cooler external evening air is circulated within the building there by cooling the buildingfabric thus reducing peak building cooling loads. By utilising the cheaper night electricitytariff the cost of operating the AHU will be minimised offering greater fiscal savings. TheBMS strategy must ensure that hold-offs are placed upon the cooling plant and boiler. Athermal wheel consists of a circular honeycomb matrix of heat-absorbing material, whichis slowly rotated within the supply and exhaust air streams of an air handling system. Asthe thermal wheel rotates heat is picked up from the exhaust air stream in one half of therotation, and given up to the fresh air stream in the other half of the rotation. Thus wasteheat energy from the exhaust air stream is transferred to the matrix material and then fromthe matrix material to the fresh air stream, raising the temperature of the supply air streamby an amount proportional to the temperature differential between air streams, or 'thermalgradient', and depending upon the efficiency of the device. The airstreams must be flowing inopposite directions or no beneficial heat exchange can occur. The principle of course worksin reverse and 'coolth' energy can be recovered to the supply air stream if so desired and thetemperature differential allows. It is recommended that the possibility of DCV be considered.Demand-controlled ventilation (DCV) using carbon dioxide (CO2) sensing is a combinationof two technologies: CO2 sensors that monitor CO2 levels in the air inside a building, and anair-handling system that uses data from the sensors to regulate the amount of ventilation airadmitted. CO2 sensors continually monitor the air in a conditioned space. Given a predictableactivity level, such as might occur in an office, people will exhale CO2 at a predictable level.Thus CO2 production in the space will very closely track occupancy. Outside CO2 levels aretypically at low concentrations of around 400 to 450 ppm. Given these two characteristicsof CO2, an indoor CO2 measurement can be used to measure and control the amount ofoutside air at a low CO2 concentration that is being introduced to dilute the CO2 generatedby building occupants. The result is that ventilation rates can be measured and controlled to aspecific cfm/person based on actual occupancy. This is in contrast to the traditional method ofventilating at a fixed rate regardless of occupancy.


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CS7.1CS7.2

Outdoor AirInlets




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Component Identifier VOL001/SYS001/AHU3 Queen Elizabeth Hall





Areas / Systems Served Queen Elizabeth Hall


No documentation was provided prior to the inspection to enable checking to take place and no documentation was available on site. Supply 2.83m/s x (2.63 x 1.76) = 13.1m3/s 37kW + 18.5kW= 55.5 x 70% = 38.85kW 38.85/13.1 = 2.97SFP


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This section applies to the following unit:VOL001/SYS001/AHU3 Queen Elizabeth Hall






Yes [ ] No [x]



Are air intake and filter conditions acceptable? Yes [ ] No [x] The air filters are very dirty which will intern effect the efficiency of the AHU drive motor onefilter had fallen out of the frame.


CS6.1CS6.2




CS6.3

Filters


Yes [x] No [ ] Pressure differential gauges were fitted to the plant but were not operational.

It is recommended that the maintenance provider investigates why the filter pressure gauge isnot working on the QE Hall AHU.






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Does the fan rotate in the correct direction? Yes [x] No [ ] A visual inspection was carried out to ensure the fan rotation was correct.CS6.7/a Fan Rotation







None Some fan manufacturers have developed further the design of standard centrifugal casesreducing internal losses and improving air distribution from the fan discharge outlet whichhas seen efficiency gains of 2% to 4%. The new generation of direct driven high efficiencycentrifugal fan has an inclined aerofoil hollow bladed backward curved impeller, optimisedto increase the fans peak efficiency and widens the performance band at which the peakefficiency operates. The result is typically 17.5% less energy required to produce the samevolume and pressure characteristic as the previous generation of fan technology. By directcoupling the motor drive to the fan shaft the small additional losses of 3% to 4% associatedwith belt slip and pulley losses will be eliminated. These fan assemblies will offer even greaterenergy saving by improved air distribution through the AHU. Some manufactures of thesmaller range of units offer ‘Plug’ fans complete with Electronically Commutated (EC) fanmotors, these motors will consume on average 20% less than a similar standard AC motor. Itis recommended that options of installing run around coils are investigated for the AHUs thathave the supply and exhaust air stream located in nearby areas. It is not always practical torecover this energy due to the actual application/current supply and exhaust arrangements,but in some cases a simple run around coil arrangement could recover up to 60% of this


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energy. This energy is then transferred back into the supply stream reducing heating loadsin winter and possibly cooling loads during peak summer weather. The operation of thesesystems must be linked back into a unit controller or BMS to ensure that true savings arerealised. Many plants are now assessing the potential energy saving possibilities fromintroducing new low energy filters. With ever increasing attention being paid to energyconsumption many of the filter manufacturers have invested in research to improve air qualitywhilst reducing pressure loss across the filters. This enables them to work for long periodsbefore they require to be changed. With a large amount of energy required to power theAHU motors, small reductions in system static pressure will lead to an overall reduction inenergy consumption. An option of night purging should be further investigated. This is whenthe cooler external evening air is circulated within the building there by cooling the buildingfabric thus reducing peak building cooling loads. By utilising the cheaper night electricitytariff the cost of operating the AHU will be minimised offering greater fiscal savings. TheBMS strategy must ensure that hold-offs are placed upon the cooling plant and boiler. Athermal wheel consists of a circular honeycomb matrix of heat-absorbing material, whichis slowly rotated within the supply and exhaust air streams of an air handling system. Asthe thermal wheel rotates heat is picked up from the exhaust air stream in one half of therotation, and given up to the fresh air stream in the other half of the rotation. Thus wasteheat energy from the exhaust air stream is transferred to the matrix material and then fromthe matrix material to the fresh air stream, raising the temperature of the supply air streamby an amount proportional to the temperature differential between air streams, or 'thermalgradient', and depending upon the efficiency of the device. The airstreams must be flowing inopposite directions or no beneficial heat exchange can occur. The principle of course worksin reverse and 'coolth' energy can be recovered to the supply air stream if so desired and thetemperature differential allows. It is recommended that the possibility of DCV be considered.Demand-controlled ventilation (DCV) using carbon dioxide (CO2) sensing is a combinationof two technologies: CO2 sensors that monitor CO2 levels in the air inside a building, and anair-handling system that uses data from the sensors to regulate the amount of ventilation airadmitted. CO2 sensors continually monitor the air in a conditioned space. Given a predictableactivity level, such as might occur in an office, people will exhale CO2 at a predictable level.Thus CO2 production in the space will very closely track occupancy. Outside CO2 levels aretypically at low concentrations of around 400 to 450 ppm. Given these two characteristicsof CO2, an indoor CO2 measurement can be used to measure and control the amount ofoutside air at a low CO2 concentration that is being introduced to dilute the CO2 generatedby building occupants. The result is that ventilation rates can be measured and controlled to a


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specific cfm/person based on actual occupancy. This is in contrast to the traditional method ofventilating at a fixed rate regardless of occupancy.


The ductworkappeared to be ina good conditionhowever, the rearaccess door ofthe AHU wasbent in and wasallowing air tobypass the filterswhich will resultin a dirty heatexchanger.

A thorough examination of all ductwork should take place regularly in accordance withDW143-HVCA Practical Guide to Ductwork Leak Testing and any repairs should be carriedout. Duct leakage can waste a significant amount of energy in HVAC systems. Measuresfor reducing duct leakage include installing duct installation and performing regular ductinspection and maintenance, including routine leak detection and repair. Repairing duct leaksin industrial and commercial spaces can reduce HVAC energy consumption by up to 30%.It is recommended that the rear access panel on the QE Hall AHU be repaired and the heatexchanger be chemically cleaned.

CS7.1CS7.2

Outdoor AirInlets




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Component Identifier VOL001/SYS001/AHU4 Foyer and Workshop





Areas / Systems Served Foyer and Workshop


No documentation was provided prior to the inspection to enable checking to take place and no documentation was available on site. Supply 3.11m/s x (1.22 x 0.94) = 3.57m3/s 11kW + 5.5kW =16.5 x 70% = 11.55kW 11.55/3.57 = 3.24 SFP


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This section applies to the following unit:VOL001/SYS001/AHU4 Foyer and Workshop






Yes [ ] No [x]





CS6.1CS6.2




CS6.3

Filters


Yes [x] No [ ] Pressure differential gauges were fitted to the plant and was operational.







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RRN: 0350-0157-9579-2909-1002 Page 107 of 162




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CS7.1CS7.2

Outdoor AirInlets




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Component Identifier VOL001/SYS001/AHU5 Council Chamber





Areas / Systems Served Council Chamber and Reception


No documentation was provided prior to the inspection to enable checking to take place and no documentation was available on site. Supply 2.48m/s x (2.02 x 1.28) = 6.41m3/s 18.5kW + 7.5kW= 26 x 70% = 18.2kW 18.2/6.41 = 2.84 SFP


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This section applies to the following unit:VOL001/SYS001/AHU5 Council Chamber






Yes [ ] No [x]





CS6.1CS6.2




CS6.3

Filters


Yes [ ] No [x] Pressure differential gauges were fitted to the plant and were not operational.

The Council Chamber AHU had a fluid filled manometer that was not working due to a lackof fluid. It is recommended that the fluid be replenished and maintained that way and thenext time the new filters are fitted the gauge should be marked to indicate the good air flowposition. This will aid in the identification of increased static pressure due to filters beingblocked.




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None Some fan manufacturers have developed further the design of standard centrifugal casesreducing internal losses and improving air distribution from the fan discharge outlet whichhas seen efficiency gains of 2% to 4%. The new generation of direct driven high efficiencycentrifugal fan has an inclined aerofoil hollow bladed backward curved impeller, optimisedto increase the fans peak efficiency and widens the performance band at which the peakefficiency operates. The result is typically 17.5% less energy required to produce the samevolume and pressure characteristic as the previous generation of fan technology. By directcoupling the motor drive to the fan shaft the small additional losses of 3% to 4% associatedwith belt slip and pulley losses will be eliminated. These fan assemblies will offer even greaterenergy saving by improved air distribution through the AHU. Some manufactures of thesmaller range of units offer ‘Plug’ fans complete with Electronically Commutated (EC) fan


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motors, these motors will consume on average 20% less than a similar standard AC motor. Itis recommended that options of installing run around coils are investigated for the AHUs thathave the supply and exhaust air stream located in nearby areas. It is not always practical torecover this energy due to the actual application/current supply and exhaust arrangements,but in some cases a simple run around coil arrangement could recover up to 60% of thisenergy. This energy is then transferred back into the supply stream reducing heating loadsin winter and possibly cooling loads during peak summer weather. The operation of thesesystems must be linked back into a unit controller or BMS to ensure that true savings arerealised. Many plants are now assessing the potential energy saving possibilities fromintroducing new low energy filters. With ever increasing attention being paid to energyconsumption many of the filter manufacturers have invested in research to improve air qualitywhilst reducing pressure loss across the filters. This enables them to work for long periodsbefore they require to be changed. With a large amount of energy required to power theAHU motors, small reductions in system static pressure will lead to an overall reduction inenergy consumption. An option of night purging should be further investigated. This is whenthe cooler external evening air is circulated within the building there by cooling the buildingfabric thus reducing peak building cooling loads. By utilising the cheaper night electricitytariff the cost of operating the AHU will be minimised offering greater fiscal savings. TheBMS strategy must ensure that hold-offs are placed upon the cooling plant and boiler. Athermal wheel consists of a circular honeycomb matrix of heat-absorbing material, whichis slowly rotated within the supply and exhaust air streams of an air handling system. Asthe thermal wheel rotates heat is picked up from the exhaust air stream in one half of therotation, and given up to the fresh air stream in the other half of the rotation. Thus wasteheat energy from the exhaust air stream is transferred to the matrix material and then fromthe matrix material to the fresh air stream, raising the temperature of the supply air streamby an amount proportional to the temperature differential between air streams, or 'thermalgradient', and depending upon the efficiency of the device. The airstreams must be flowing inopposite directions or no beneficial heat exchange can occur. The principle of course worksin reverse and 'coolth' energy can be recovered to the supply air stream if so desired and thetemperature differential allows. It is recommended that the possibility of DCV be considered.Demand-controlled ventilation (DCV) using carbon dioxide (CO2) sensing is a combinationof two technologies: CO2 sensors that monitor CO2 levels in the air inside a building, and anair-handling system that uses data from the sensors to regulate the amount of ventilation airadmitted. CO2 sensors continually monitor the air in a conditioned space. Given a predictableactivity level, such as might occur in an office, people will exhale CO2 at a predictable level.Thus CO2 production in the space will very closely track occupancy. Outside CO2 levels aretypically at low concentrations of around 400 to 450 ppm. Given these two characteristics


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of CO2, an indoor CO2 measurement can be used to measure and control the amount ofoutside air at a low CO2 concentration that is being introduced to dilute the CO2 generatedby building occupants. The result is that ventilation rates can be measured and controlled to aspecific cfm/person based on actual occupancy. This is in contrast to the traditional method ofventilating at a fixed rate regardless of occupancy.


The ductworkappeared to be ina good condition,there were noobvious signsof leakage, allinspected areasappeared to bewell sealed, wellinsulated andfree from airleaks however,the flexible jointbetween the fansection and theheat exchangersection of theAHU is split andis leaking.

A thorough examination of all ductwork should take place regularly in accordance withDW143-HVCA Practical Guide to Ductwork Leak Testing and any repairs should be carriedout. Duct leakage can waste a significant amount of energy in HVAC systems. Measuresfor reducing duct leakage include installing duct installation and performing regular ductinspection and maintenance, including routine leak detection and repair. Repairing duct leaksin industrial and commercial spaces can reduce HVAC energy consumption by up to 30%. Itis recommended that the flexible joint in the Council Chamber AHU be replaced to reduce airleakage.

CS7.1CS7.2

Outdoor AirInlets




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Component Identifier VOL001/SYS001/AHU6 Rochdale Road Offices





Areas / Systems Served Rochdale Road Offices


No documentation was provided prior to the inspection to enable checking to take place and no documentation was available on site. Supply 2.05m/s x (1.52 x 1.28) = 3.99m3/s 11kW + 5.5kW =16.5 x 70% = 11.55kW 11.55/3.99 = 2.89 SFP


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This section applies to the following unit:VOL001/SYS001/AHU6 Rochdale Road Offices






Yes [ ] No [x]



Are air intake and filter conditions acceptable? Yes [ ] No [x] The air filters are very dirty which will intern effect the efficiency of the AHU drive motor, oneof the filters had fallen out of the frame allowing air to bypass the filters.


CS6.1CS6.2




CS6.3

Filters








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None Some fan manufacturers have developed further the design of standard centrifugal casesreducing internal losses and improving air distribution from the fan discharge outlet whichhas seen efficiency gains of 2% to 4%. The new generation of direct driven high efficiencycentrifugal fan has an inclined aerofoil hollow bladed backward curved impeller, optimisedto increase the fans peak efficiency and widens the performance band at which the peakefficiency operates. The result is typically 17.5% less energy required to produce the samevolume and pressure characteristic as the previous generation of fan technology. By directcoupling the motor drive to the fan shaft the small additional losses of 3% to 4% associatedwith belt slip and pulley losses will be eliminated. These fan assemblies will offer even greaterenergy saving by improved air distribution through the AHU. Some manufactures of thesmaller range of units offer ‘Plug’ fans complete with Electronically Commutated (EC) fanmotors, these motors will consume on average 20% less than a similar standard AC motor. Itis recommended that options of installing run around coils are investigated for the AHUs thathave the supply and exhaust air stream located in nearby areas. It is not always practical torecover this energy due to the actual application/current supply and exhaust arrangements,but in some cases a simple run around coil arrangement could recover up to 60% of this


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energy. This energy is then transferred back into the supply stream reducing heating loadsin winter and possibly cooling loads during peak summer weather. The operation of thesesystems must be linked back into a unit controller or BMS to ensure that true savings arerealised. Many plants are now assessing the potential energy saving possibilities fromintroducing new low energy filters. With ever increasing attention being paid to energyconsumption many of the filter manufacturers have invested in research to improve air qualitywhilst reducing pressure loss across the filters. This enables them to work for long periodsbefore they require to be changed. With a large amount of energy required to power theAHU motors, small reductions in system static pressure will lead to an overall reduction inenergy consumption. An option of night purging should be further investigated. This is whenthe cooler external evening air is circulated within the building there by cooling the buildingfabric thus reducing peak building cooling loads. By utilising the cheaper night electricitytariff the cost of operating the AHU will be minimised offering greater fiscal savings. TheBMS strategy must ensure that hold-offs are placed upon the cooling plant and boiler. Athermal wheel consists of a circular honeycomb matrix of heat-absorbing material, whichis slowly rotated within the supply and exhaust air streams of an air handling system. Asthe thermal wheel rotates heat is picked up from the exhaust air stream in one half of therotation, and given up to the fresh air stream in the other half of the rotation. Thus wasteheat energy from the exhaust air stream is transferred to the matrix material and then fromthe matrix material to the fresh air stream, raising the temperature of the supply air streamby an amount proportional to the temperature differential between air streams, or 'thermalgradient', and depending upon the efficiency of the device. The airstreams must be flowing inopposite directions or no beneficial heat exchange can occur. The principle of course worksin reverse and 'coolth' energy can be recovered to the supply air stream if so desired and thetemperature differential allows. It is recommended that the possibility of DCV be considered.Demand-controlled ventilation (DCV) using carbon dioxide (CO2) sensing is a combinationof two technologies: CO2 sensors that monitor CO2 levels in the air inside a building, and anair-handling system that uses data from the sensors to regulate the amount of ventilation airadmitted. CO2 sensors continually monitor the air in a conditioned space. Given a predictableactivity level, such as might occur in an office, people will exhale CO2 at a predictable level.Thus CO2 production in the space will very closely track occupancy. Outside CO2 levels aretypically at low concentrations of around 400 to 450 ppm. Given these two characteristicsof CO2, an indoor CO2 measurement can be used to measure and control the amount ofoutside air at a low CO2 concentration that is being introduced to dilute the CO2 generatedby building occupants. The result is that ventilation rates can be measured and controlled to a


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specific cfm/person based on actual occupancy. This is in contrast to the traditional method ofventilating at a fixed rate regardless of occupancy.




CS7.1CS7.2

Outdoor AirInlets




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Component Identifier VOL001/SYS001/AHU7 Bar & Offices





Areas / Systems Served Bar & Offices


No documentation was provided prior to the inspection to enable checking to take place and no documentation was available on site. SFP could not be calculated due to the AHU not beingoperational.


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This section applies to the following unit:VOL001/SYS001/AHU7 Bar & Offices






Yes [ ] No [x]

SFP Calculation:0




CS6.1CS6.2




CS6.3

Filters


Yes [ ] No [x] No pressure differential gauges were fitted to the plant.





CS6.7/a Fan Rotation Does the fan rotate in the correct direction? Yes [x] No [ ]


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CS7.1CS7.2

Outdoor AirInlets




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Component Identifier VOL001/SYS001/AHU8 Lees Suite

Systems Served from Cooling Plant VOL001/SYS001/CP6 Lees Suite




Areas / Systems Served Lees Suite


No documentation was provided prior to the inspection to enable checking to take place and no documentation was available on site. Supply 5.12m/s x (0.96 x 0.96) = 4.72m3/s 3kW + 3kW = 6x 70% = 4.2kW 4.2/4.72 = 0.89 SFP


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This section applies to the following unit:VOL001/SYS001/AHU8 Lees Suite






Yes [ ] No [x]





CS6.1CS6.2




CS6.3

Filters


Yes [x] No [ ] Pressure differential gauges were fitted to the plant and was operational.







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The ductworkappeared to be ina good condition,there were noobvious signsof leakage, allinspected areasappeared tobe well sealed,well insulatedand free fromair leaks. Theexhaust damperlinkage wasbroken.

A thorough examination of all ductwork should take place regularly in accordance withDW143-HVCA Practical Guide to Ductwork Leak Testing and any repairs should be carriedout. Duct leakage can waste a significant amount of energy in HVAC systems. Measuresfor reducing duct leakage include installing duct installation and performing regular ductinspection and maintenance, including routine leak detection and repair. Repairing duct leaksin industrial and commercial spaces can reduce HVAC energy consumption by up to 30%. Itis recommended that the exhaust damper linkage on the Lees Suite AHU be repaired as itwas broken at the time of the inspection.

CS7.1CS7.2

Outdoor AirInlets




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Component Identifier VOL001/SYS001/AHU9 Crompton Suite

Systems Served from Cooling Plant VOL001/SYS001/CP3 Crompton Suite




Areas / Systems Served Crompton Suite


No documentation was provided prior to the inspection to enable checking to take place and no documentation was available on site. Supply 2.04m/s x (0.96 x 0.96) = 1.88m3/s 3kW + 3kW = 6x 70% = 4.2kW 4.2/1.88 = 2.23 SFP


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This section applies to the following unit:VOL001/SYS001/AHU9 Crompton Suite






Yes [ ] No [x]



Are air intake and filter conditions acceptable? Yes [ ] No [x] The air filters are very dirty which will intern effect the efficiency of the AHU drive motor, oneof the filters had fallen out of the frame.


CS6.1CS6.2




CS6.3

Filters



The Council Chamber AHU had a fluid filled manometer that was not working due to a lackof fluid. It is recommended that the fluid be replenished and maintained that way and thenext time the new filters are fitted the gauge should be marked to indicate the good air flowposition. This will aid in the identification of increased static pressure due to filters beingblocked.




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None Some fan manufacturers have developed further the design of standard centrifugal casesreducing internal losses and improving air distribution from the fan discharge outlet whichhas seen efficiency gains of 2% to 4%. The new generation of direct driven high efficiencycentrifugal fan has an inclined aerofoil hollow bladed backward curved impeller, optimisedto increase the fans peak efficiency and widens the performance band at which the peakefficiency operates. The result is typically 17.5% less energy required to produce the samevolume and pressure characteristic as the previous generation of fan technology. By directcoupling the motor drive to the fan shaft the small additional losses of 3% to 4% associatedwith belt slip and pulley losses will be eliminated. These fan assemblies will offer even greaterenergy saving by improved air distribution through the AHU. Some manufactures of thesmaller range of units offer ‘Plug’ fans complete with Electronically Commutated (EC) fan


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motors, these motors will consume on average 20% less than a similar standard AC motor. Itis recommended that options of installing run around coils are investigated for the AHUs thathave the supply and exhaust air stream located in nearby areas. It is not always practical torecover this energy due to the actual application/current supply and exhaust arrangements,but in some cases a simple run around coil arrangement could recover up to 60% of thisenergy. This energy is then transferred back into the supply stream reducing heating loadsin winter and possibly cooling loads during peak summer weather. The operation of thesesystems must be linked back into a unit controller or BMS to ensure that true savings arerealised. Many plants are now assessing the potential energy saving possibilities fromintroducing new low energy filters. With ever increasing attention being paid to energyconsumption many of the filter manufacturers have invested in research to improve air qualitywhilst reducing pressure loss across the filters. This enables them to work for long periodsbefore they require to be changed. With a large amount of energy required to power theAHU motors, small reductions in system static pressure will lead to an overall reduction inenergy consumption. An option of night purging should be further investigated. This is whenthe cooler external evening air is circulated within the building there by cooling the buildingfabric thus reducing peak building cooling loads. By utilising the cheaper night electricitytariff the cost of operating the AHU will be minimised offering greater fiscal savings. TheBMS strategy must ensure that hold-offs are placed upon the cooling plant and boiler. Athermal wheel consists of a circular honeycomb matrix of heat-absorbing material, whichis slowly rotated within the supply and exhaust air streams of an air handling system. Asthe thermal wheel rotates heat is picked up from the exhaust air stream in one half of therotation, and given up to the fresh air stream in the other half of the rotation. Thus wasteheat energy from the exhaust air stream is transferred to the matrix material and then fromthe matrix material to the fresh air stream, raising the temperature of the supply air streamby an amount proportional to the temperature differential between air streams, or 'thermalgradient', and depending upon the efficiency of the device. The airstreams must be flowing inopposite directions or no beneficial heat exchange can occur. The principle of course worksin reverse and 'coolth' energy can be recovered to the supply air stream if so desired and thetemperature differential allows. It is recommended that the possibility of DCV be considered.Demand-controlled ventilation (DCV) using carbon dioxide (CO2) sensing is a combinationof two technologies: CO2 sensors that monitor CO2 levels in the air inside a building, and anair-handling system that uses data from the sensors to regulate the amount of ventilation airadmitted. CO2 sensors continually monitor the air in a conditioned space. Given a predictableactivity level, such as might occur in an office, people will exhale CO2 at a predictable level.Thus CO2 production in the space will very closely track occupancy. Outside CO2 levels aretypically at low concentrations of around 400 to 450 ppm. Given these two characteristics


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of CO2, an indoor CO2 measurement can be used to measure and control the amount ofoutside air at a low CO2 concentration that is being introduced to dilute the CO2 generatedby building occupants. The result is that ventilation rates can be measured and controlled to aspecific cfm/person based on actual occupancy. This is in contrast to the traditional method ofventilating at a fixed rate regardless of occupancy.


The ductworkappeared to be ina good condition,there were noobvious signsof leakage, allinspected areasappeared to bewell sealed, wellinsulated andfree from airleaks however,the flexible jointbetween the fansection and theheat exchangersection of theAHU is split andis leaking.


CS7.1CS7.2

Outdoor AirInlets




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Terminal Units:

Terminal Unit Equipment InspectionUnit Identifier VOL001/SYS001 Oldham Civic Centre

Component Identifier VOL001/SYS001/TU1 Main Reception

Description of Unit Cassette

Identify Cooling Plant Serving Terminal Unit VOL001/SYS001/CP9 Main Reception


Year Terminal Unit Installed 2009

Terminal Unit Location Main Reception

Area Served Main Reception

Note below any discrepancy between information provided by client and on site information collected, or any information of additional relevance to the terminal unit/system:

No documentation was provided prior to the inspection to enable checking to take place and no documentation was available on site.


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This section applies to the following unit:VOL001/SYS001/TU1 Main Reception

Terminal Unit Detailed Inspection NotesItem Ref Item Inspection Item Finding Notes and Recommendations

Is the pipework adequately insulated? Yes [x] No [ ] There were no cracks or gaps in the pipe work insulation on the pipes observed during thisinspection.

CS4.1 Insulation

Is the ductwork adequately insulated? Yes [ ] No [x] There was no ductwork connected to this terminal unit.

CS4.2 Unit Condition Are the terminal units in good working order? Yes [x] No [ ] The terminal unit was functioning as designed.

Do air delivery openings provide gooddistribution?

Yes [x] No [ ] Air distribution is even over the room and the terminal unit is working as the manufacturersdesigned.

Is there evidence of tampering with diffusers? Yes [ ] No [x] The diffusers do not show any sign of tampering.

CS5.1

Are chilled and hot water being supplied toterminals simultaneously?

Yes [ ] No [x] The terminal unit is of DX style.

CS5.2

Grilles & AirFlow

Are there are any records of occupantcomplaints regarding air distribution

Yes [ ] No [x] No complaints recorded against this terminal unit.

CS5.3 Is there potential for air to short-circuit fromsupply to extract?

Yes [ ] No [x] Manufacturers air delivery system with no air short circuiting issues.

CS5.4 Is the position of partitioning or furnitureadversely affecting performance?

Yes [ ] No [x] The positioning of the furniture and partitioning in this area is not affecting the overallperformance of the terminal unit.

CS5.5

DiffuserPositions

Is the control and operation adequate? Yes [x] No [ ]


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CS4.1 Insulation






CS5.1



CS5.2

Grilles & AirFlow







CS5.5

DiffuserPositions



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CS4.1 Insulation






CS5.1



CS5.2

Grilles & AirFlow







CS5.5

DiffuserPositions



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Component Identifier VOL001/SYS001/TU4 Varsatemp 1

Description of Unit Concealed perimeter unit

Identify Cooling Plant Serving Terminal Unit VOL001/SYS001/CP1 Chiller 1

Manufacturer No Known


Terminal Unit Location Perimeter of Rochdale road offices

Area Served Rochdale road offices




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This section applies to the following unit:VOL001/SYS001/TU4 Varsatemp 1



CS4.1 Insulation


CS4.2 Unit Condition Are the terminal units in good working order? Yes [ ] No [x] The terminal unit was functioning as designed however, the filters were blocked.

It is recommended that the Varsatemp return air filters are cleaned and the maintenancefrequency reviewed.




CS5.1



CS5.2

Grilles & AirFlow





CS5.4

DiffuserPositions

Is the position of partitioning or furnitureadversely affecting performance?



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CS5.5 Is the control and operation adequate? Yes [x] No [ ]


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CS4.1 Insulation


CS4.2 Unit Condition Are the terminal units in good working order? Yes [ ] No [x] The terminal unit was functioning as designed however, the filters were blocked.





CS5.1



CS5.2

Grilles & AirFlow





CS5.4

DiffuserPositions




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CS4.1 Insulation


CS4.2 Unit Condition Are the terminal units in good working order? Yes [ ] No [x] The terminal unit was functioning as designed however, the filters were bloked.





CS5.1



CS5.2

Grilles & AirFlow





CS5.4

DiffuserPositions




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Component Identifier VOL001/SYS001/TU7 AHU Supply Grille

Description of Unit Linear Slot Diffuser




Terminal Unit Location Chadderton

Area Served Chadderton Suite




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This section applies to the following unit:VOL001/SYS001/TU7 AHU Supply Grille


Is the pipework adequately insulated? Yes [ ] No [x] No pipework as this termination unit is the grille delivering the air to the conditioned area.CS4.1 Insulation

Is the ductwork adequately insulated? Yes [x] No [ ] The insulation was adequate to prevent heat gain.





CS5.1


Yes [ ] No [x] This is only the grille, no simultaneous heating and cooling.

CS5.2

Grilles & AirFlow







CS5.5

DiffuserPositions

Is the control and operation adequate? Yes [x] No [ ] The operation of the grille is good.


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Description of Unit Spiral Diffuser

Identify Cooling Plant Serving Terminal Unit VOL001/SYS001/CP3 Crompton Suite



Terminal Unit Location Crompton Suite

Area Served Crompton Suite




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CS5.1



CS5.2

Grilles & AirFlow







CS5.5

DiffuserPositions



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Description of Unit Four Way Blow Diffuser




Terminal Unit Location Failsworth Suite

Area Served Failsworth Suite




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CS5.1



CS5.2

Grilles & AirFlow







CS5.5

DiffuserPositions



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Description of Unit Spot




Terminal Unit Location QE Hall

Area Served QE Hall




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CS5.1



CS5.2

Grilles & AirFlow







CS5.5

DiffuserPositions



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Description of Unit Spot




Terminal Unit Location QE Hall

Area Served QE Hall




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CS5.1



CS5.2

Grilles & AirFlow







CS5.5

DiffuserPositions



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System Controls:

System ControlsItem Ref Inspection Item Finding Notes and Recommendations

n/a Sub System Identifier (if applicable) VOL001/SYS001Oldham CivicCentre

CS8.1 Is the zoning appropriate in relation toanticipated cooling demand?

Yes [x] No [ ] The BMS monitors the sensors from each area and AHU. AHUs except Lees Suite which has no controller

CS8.2 Note the current indicated weekday and timeof day on controllers or BMS against the actualtime.

Time displayed09:43 actual09:40

CS8.3/a Note the set on and off periods (for weekdayand weekend if this facility is available with thetimer).

On and Off timesvary from weekto week. Regularsettings Mondayon at 05:00 off at17:30 Tuesdayto Friday onat 07:30 off at17:30.

CS8.3/b Is there a shortfall in timer capabilities? Yes [ ] No [x] Timer schedules forms an integral part of the remote BMS system.

CS8.4 Identify and assess zone heating and coolingtemperature control sensors. Are the sensortypes and locations appropriate in relation toheating and cooling emitters, heat flows orlikely temperature distributions in the zone orspace?

Yes [x] No [ ] The BMS system has duct and wall mounted sensors distributed around the zones to adequately monitor thetemperatures.

CS8.5 Note the set temperature in each zone forheating and cooling in relation to the activitiesand occupancy of zones and spaces in relationto the manager's intent.

Set points onaverage 23degrees

It is recommended that the client introduces summer, winter and autumn/spring set-points/operating conditioningto minimise energy waste. The winter set-points should be between 19°C and 20°C with the unit set to heatingonly mode and summer set-points of 23°C to 24°C operating in cooling only mode. Due to the fluctuating externalconditioning during spring/autumn the option of utilising auto mode would ensure that set-points (21°C - 22°C)are satisfied with minimal adjustments required to the controllers. From previous Carbon Trust studies it is


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recommended that when heat pumps are in cooling mode that they are set to maintain 24°C, with an estimatedsaving of 4% on annual system running costs for every 1K increase in cooling set-point temperature.

CS8.6 Note whether a 'dead band' is, or can be, setbetween heating and cooling.

A dead band of 2degrees is set bythe manufacturer.

CS8.7 Do the sub system controls integrateeffectively with the overall system controlstrategy?

Yes [x] No [ ]

CS8.8 Assess the means of modulating or controllingair flow rate through the air supply and exhaustducts.

AHUs are fixedspeed with theexception of theTower

PS3.6 Are guidance notices visible or controlsavailable to inhibit use of cooling equipmentwhilst windows are open or cooling/heating ison?

Yes [ ] No [x] Guidance notices should be displayed to prevent the systems be set incorrectly.

Simple instructions in the form of a notice can be a very easy way to ensure that employees are made aware ofbad practices that can lead to excessive energy waste from space conditioning equipment. Consider mountingguidance notes in a prominent position near terminals and controls advising occupants to be wary of operatingthe system whilst windows are open, heating is on, or when the room is unoccupied. Also advise on a suitabletemperature setting. Guidance notices should contain all of the following information: • A reminder to switchoff systems when rooms are unoccupied. • The recommended set temperature. • A reminder for staff to switchoff the air conditioning before putting on the heating. • A reminder to switch of cooling plants before openingwindows.


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n/a Sub System Identifier (if applicable) VOL001/SYS001Oldham CivicCentre

CS8.1 Is the zoning appropriate in relation toanticipated cooling demand?

Yes [x] No [ ] There is three terminal units to one controller. Main Reception

CS8.2 Note the current indicated weekday and timeof day on controllers or BMS against the actualtime.

Time displayed09:50 actual09:50

CS8.3/a Note the set on and off periods (for weekdayand weekend if this facility is available with thetimer).

No timers set

CS8.3/b Is there a shortfall in timer capabilities? Yes [x] No [ ] No timer schedules.

CS8.4 Identify and assess zone heating and coolingtemperature control sensors. Are the sensortypes and locations appropriate in relation toheating and cooling emitters, heat flows orlikely temperature distributions in the zone orspace?

Yes [x] No [ ] Manufacturers installed return air sensors houses internally in the terminal unit.

CS8.5 Note the set temperature in each zone forheating and cooling in relation to the activitiesand occupancy of zones and spaces in relationto the manager's intent.

Set points onaverage 26degrees

It is recommended that the client introduces summer, winter and autumn/spring set-points/operating conditioningto minimise energy waste. The winter set-points should be between 19°C and 20°C with the unit set to heatingonly mode and summer set-points of 23°C to 24°C operating in cooling only mode. Due to the fluctuating externalconditioning during spring/autumn the option of utilising auto mode would ensure that set-points (21°C - 22°C)are satisfied with minimal adjustments required to the controllers. From previous Carbon Trust studies it isrecommended that when heat pumps are in cooling mode that they are set to maintain 24°C, with an estimatedsaving of 4% on annual system running costs for every 1K increase in cooling set-point temperature.

CS8.6 Note whether a 'dead band' is, or can be, setbetween heating and cooling.

A dead band of 2degrees is set bythe manufacturer.


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CS8.7 Do the sub system controls integrateeffectively with the overall system controlstrategy?

Yes [x] No [ ]

CS8.8 Assess the means of modulating or controllingair flow rate through the air supply and exhaustducts.

The air flow incontrolled bythe fan speedselected on thecontroller.

PS3.6 Are guidance notices visible or controlsavailable to inhibit use of cooling equipmentwhilst windows are open or cooling/heating ison?

Yes [ ] No [x] Guidance notices should be displayed to prevent the systems be set incorrectly.

Simple instructions in the form of a notice can be a very easy way to ensure that employees are made aware ofbad practices that can lead to excessive energy waste from space conditioning equipment. Consider mountingguidance notes in a prominent position near terminals and controls advising occupants to be wary of operatingthe system whilst windows are open, heating is on, or when the room is unoccupied. Also advise on a suitabletemperature setting. Guidance notices should contain all of the following information: • A reminder to switchoff systems when rooms are unoccupied. • The recommended set temperature. • A reminder for staff to switchoff the air conditioning before putting on the heating. • A reminder to switch of cooling plants before openingwindows.

Photographic Appendix

Site DetailsMain Reception Entrance

VOL001/SYS001/CP1 Chiller 1Climate Chiller 1

VOL001/SYS001/CP1 Chiller 1Chiller Heat Exchangers

VOL001/SYS001/CP1 Chiller 1Chiller Heat Exchanger Pipe Insulation

VOL001/SYS001/CP1 Chiller 1Refrigerant Leak Detected on the Chiller1 Compressor 1 System

VOL001/SYS001/CP1 Chiller 1Chiller 1 Pre-Compressor Temperature

VOL001/SYS001/CP1 Chiller 1Chiller 1 Post Compressor Temperature

VOL001/SYS001/CP2 Chiller 2Chiller 2 Pre-Compressor Temperature

VOL001/SYS001/CP2 Chiller 2Chiller 2 Post Compressor Temperature

VOL001/SYS001/CP3 Crompton SuiteCrompton Suite Cooling Plants

VOL001/SYS001/CP3 Crompton Suite VOL001/SYS001/CP6 Lees SuiteLees Suite Cooling Plants

VOL001/SYS001/CP9 Main ReceptionMain Reception Cooling Plant

VOL001/SYS001/CP9 Main ReceptionCooling Plant for the Main ReceptionCondensate Pump, Unit Leaking Water

VOL001/SYS001/AHU1 TowerTower AHU Filters

VOL001/SYS001/AHU3 Queen ElizabethHallQE Hall AHU Filter Fallen out of theFrame

VOL001/SYS001/AHU5 Council ChamberCouncil Chamber AHU Manometer had noFluid

VOL001/SYS001/AHU5 Council ChamberCouncil Chamber AHU Flexible Joint Split

VOL001/SYS001/AHU8 Lees SuiteLees Suite AHU Exhaust Damper LinkageBroken

VOL001/SYS001/AHU9 Crompton SuiteCrompton Suite AHU Filter Fallen out ofthe Frame

VOL001/SYS001/TU4 Varsatemp 1Varsatemp Return Air Filter

VOL001/SYS001/TU7 AHU Supply GrilleChadderton Grille

VOL001/SYS001/TU8 AHU Supply GrilleCrompton Suite Supply Grille

VOL001/SYS001/TU9 AHU Supply GrilleFailsworth Suite Grille

VOL001/SYS001/TU10 AHU Supply GrilleQE Hall Diffusers

report type: complexed central (level 4) air · pdf filereport type: complexed central (level...

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