lindab compact air handling unit compair cf

Lindab Compact air handling unit COMPAIR CF

Transport, installation, start-up, maintenance and service manual

lindab | we simplify construction

inda

b | we simplify construction


We reserve to make changes without prior notice 15.10.2016

2

CompAir CF

1 General 1.1 Types of functional sections 1.2 Functional elements 1.3 Housing checking and maintenance

2 Transportation

3 Installation 3.1 Servicing area 3.2 Construction of a foundation 3.3 Mounting of an AHU without foundation 3.4 AHU mounting procedure 3.5 Installation of outdoor units

4 Functional sections 4.1 Fan section 4.1.1 Plug fan 4.1.2 Electric motor connection 4.1.3 Commissioning 4.1.4 Safe operation, testing and maintenance 4.2 Heater section with water heater 4.2.1 Installation and commissioning 4.2.1.1 Filling and draining procedure – transfer medium: warm, hot water 4.2.2 Operation 4.2.3 Maintenance 4.3 Heater section with electric heater 4.3.1 Installation and commissioning 4.3.2 Operation 4.3.3 Maintenance 4.4 Cooling section with water cooler 4.4.1 Installation and commissioning 4.4.1.1 Filling and draining procedure 4.4.2 Antifreezing protection of the cooler 4.4.3 Maintenance 4.5 Direct evaporator 4.5.1 Installation and commissioning 4.5.2 Operation 4.5.3 Maintenance 4.5.4 Outlet Siphon 4.5.4.1 Sizing and installation 4.6 Filter section 4.6.1 Number of filter cells per unit cross section – horizontal version 4.6.2 Number of filter cells per unit cross section – vertical version 4.6.3 Installation and commissioning 4.6.4 Operation 4.6.5 Maintenance

3 4 4 5

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7 7 8 8

9 10

11 11 11 12 12 12

13 14 15

15 15 16 16 17 17 17 18 19 19 19 20 20 22 22 23 23 24 25

25

26 26 26

4.7 Counterflow plate recuperator 4.7.1 Installation and commissioning 4.7.2 Maintenance

5 Controls 5.1 Sensors 5.2 Functional diagram with counterflow heat exchanger 5.2.1 Functional description 5.3 Functional element regulation 5.3.1 Electrical preheater regulation 5.3.2 Heat exchanger regulation 5.3.3 Filters 5.3.4 Heater frost protection 5.3.5 Frost protection of heat exchanger 5.3.6 Inlet and outlet fan 5.4 Managing with air handling unit 5.4.1 Displays 5.4.2 Connection to external units 5.4.3 Connection to cloud

6 Use of controller and display 6.1 LED 6.2 Buttons 6.3 Navigating the menus 6.4 Changing parameters 6.5 Running mode 6.6 Temperature 6.7 Deicing exchanger 6.8 Air control 6.9 Time setting 6.10 Extended running 6.11 Holidays 6.12 Other functions 6.13 Indication leds 6.14 Status indication 6.15 Alarms 6.16 Electrical board 6.17 Connecting of display 6.18 Electrical connections splitted units

7 Standard wiring diagrams

8 Symbols

28 28 28

30 30 32

32 32 32 32 33 33 33 33 34 34 34 34

35 35 35 36 36 37 38 39 39 40 42 42 42 43 43 44 48 49 49

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3 We reserve to make changes without prior notice 15.10.2016

CompAir CF

1 General

During the transport, installation, commissioning, operation, testing and maintenance of the air handling units, please observe the following:

Prior to any work on the unit, please study carefully the instructions in full.

The air handling unit may only be installed, checked, commissioned and maintained by trained personnel, who must during the operation observe the statutorily provided engineering standards and local safety regulations applicable at the time of the unit installation.

If installing, commissioning and maintenance of functional elements, are produced by manufacturers other than Lindab, the manufacturer’s instruction shall be followed.

The instructions and electrical diagrams shall be stored and kept available for the person, who operate the unit.

The air handling unit shall only be used for the purpose and under the operating conditions specified in this manual and the order confirmation. Any other use deviating from the intended use relieves the manufacturer from any obligation.

The unit manufacturer shall not be kept liable in case of failure to observe the information provided in the instructions, during the air handling unit installation, commissioning, testing and maintenance, or in cases of alterations of electrical or mechanical unit components without a prior specific approval by the manufacturer. Any unauthorised intervention to the unit voids the warranty.

Addresses of the manufacturer and authorised service

Manufacturer: Lindab IMP Klima d.o.o. Godovič 150, 5275 Godovič Slovenia Tel.: +386 (0)5 374 30 00 E-mail: [email protected] www.lindab.si

Authorised service: Lindab IMP Klima d.o.o. Godovič 150, 5275 Godovič Slovenia Tel.: +386 (0)5 374 30 00 E-mail: [email protected] www.lindab.si

http://www.lindab.si/

http://www.lindab.si/



4

1.1 Types of functional sections

Designation Description

VF Fan section – EC radial fan backwards curved without housing

EW Heater section with water heater

KW Cooling section with water cooler

KD Cooling section with DX cooler

EE Heater section with electrical heater

EEV Heater section with electrical pre-heater

FK Filter section – bag filter

FTT Filter section – panel filter

RPDG Recuperation section with counter flow plate recuperator – diagonal design

1.2 Functional elements

Figure 1 Functional elements CompAir CF with side connections and all optional sections

Feet Inlet fan

Inlet air flexible connection

Handle

Protection hood outlet

Outlet fan Electro control cabinet

By-pass damper

By-pass damper drive

Preheater Fresh air filter

Protection hood fresh air

Fresh air damper

Outlet flexible connection

Outlet air damper

Outlet air filter

Counterflow plate recuperator

Drain pan After heater

Cooler Siphon

Roof



Figure 2 Functional elements of CompAir CF with top connections and all optional sections

1.3 Housing checking and maintenance

The checking and maintenance shall be done according to the schedule set out in the following table.

Inspect for water formation within the housing x

Check the hygiene condition x

Air handling unit housing checking and maintenance schedule

Action

Time interval (months)

1 3 6 12 24 According to the hygiene inspection

Inspect for contamination, damage and corrosion of the housing interior

x

Air filter-fresh

Flexible connection

Damper

Air filter-extract

Cooler

Heater

Drain pan

Siphon

Inlet fan Outlet fan

Electro control cabinet

By-pass damper drive

Siphon Counterflow plate recuperator

Handle

Exhaust Fresh Extract Supply



6

2 Transportation

Protect each compact section (shipment units) to prevent damaging, during loading, transportation and unloading due to tumbling, sliding or uncontrolled release from the vehicle. Futhermore, to protect staff against any safety and health hazards.

Until delivery at the installation site, each compact section of the air handling unit must remain secured with all guards and protective means (diagonal restraints, wooden supports – pallets under the structural frame, protective foil etc.).

During transportation, any handling of the unit must be carried out by means of the structural frame – no pressure on the housing!

Any crane hoisting of the compact sections is to be done only by means of the structural frame provided underneath the section.

Insert appropriate tubes (thick wall tube of outside diameter ø 48.3 mm and wall thickness of 10 mm) through the circular leads in the structural frame. For lifting, apply steel hoisting ropes or chains; in all cases, apply two spacer supports (Figure 5, detail A). The tubes must be provided with appropriate guards at both ends (Figure 5, detail B).

Figure 5 Allowed transport Figure 6 Not allowed transport

Hoisting without spacer supports (Figure 6) is not allowed, since this might damage the housing.

All shipment units are factory protected by: o wooden beams (unit with support base frame) – size CompAir 6000 to 10000 or o wooden pallets (unit without support base frame) – size CompAir 1000 to 4000

When transport is carried out by forklift, always observe the weight and the position of the centre of gravity of the compact shipment unit.

Pay special attention not to excert any pressure to the bottom cover of the unit.

Forks may only excert pressure to the bottom frame whereby the forks should reach beyond the last part of the section frame – Figure 5.

1. wooden beams or palette 2. forks 3. transport unit

Figure 5

A

DETAIL A

B

DETAIL B



Always place the shipment unit on even ground. Lift the shipment unit applying the hoisting procedure described in this chapter.

No stripping of props or aids is allowed during transportation; in an event of such stripping, the person carried it out must be held fully liable for any adverse consequences. Do not remove the props untill right before the installation on site.

Until installation, store the air handling units in a roofed and dry area.

3 Installation

3.1 Servicing area

To allow maintenance interventions and operation (e.g. withdrawal of a heat exchanger), always provide a clear area of a minimum width of 1.3 x unit width on the air handling unit servicing side.

To facilitate the installation, a clearance area of a minimum width of 0.5 m should be provided on the non-servicing side as well (Figure 6).

Figure 6 Servicing area



8

In case of installation on an elevated platform, provide safe access to the platform and the necessary servicing area on the platform. Also provide appropriate guards for the maintenance technician, in accordance with applicable regulations on safety at work.

In the design and construction of electric installation and piping connections to the functional sections, the designer and the constructing contractor must refrain from leading such installations and connections through servicing doors or servicing hatches. Failure to observe this requirement may render the servicing of air handling unit functional sections impracticable.

3.2 Construction of a foundation

Mount the air handling unit onto an appropriately high and level concrete or steel foundation (or base).

Level out any irregularities in the foundation surface.

The minimum foundation height is determined by the elevation of the drain siphon in the section set and shall be 150 mm.

Figure 7 Unit on foundation

In acoustically demanding applications, separate the foundation plate from the rest of the building

structure by means of a structural noise insulation layer of appropriate thickness.

3.3 Mounting of an air handling unit without a foundation

The foundation may be substituted by the mounting unit onto Lindab type base legs fitted with a structural noise and vibration insulation bolt: - Unit without support base frame – size CompAir 1000 to 4000 (Fig. 8) - Unit with support base frame – size CompAir 6000 to 10000 (Fig.9)

Figure 8

Structural noise insulation

Air conditioning unit Drain siphon

Foundation



Figure 9

3.4 Air handling unit mounting procedure

Transport the unit to the installation site.

Remove protective screening and guards (diagonal restraints, wooden supports – pallets under the structural frame, protective foil etc.).

Check the evenness and levelling of the foundation. The section front faces must be exactly perpendicular to the foundation and parallel one to another.

Apply self-adhesive EPDM rubber sealing tape of 19 x 5 mm cross-section (supplied with the unit) onto the contact front faces (housing frame).

Draw the individual sections together by means of the tightening clamps, which you have mounted into the structural frame openings.

After having drawn the sections together, join them by means of eccentric clamps (Fig.10) or unit connections fitted on the section frames. The eccentric clamps are fitted inside on the unit, The unit connections (Fig.11) are fitted outside of the unit which have to be connected with M8x40 screw.

Figure 10 Figure 11

SEALING TAPE 19x5 ISOWA



10

3.5 Installation of outdoor units

Mount the air handling unit on a foundation of adequate height. In specifying the foundation height, take into account all factors that may potentially affect the unit operation: mounting location, depth of snow cover, requirements regarding the quality of suction of outside air, position of intake and exhaust air duct connections, design of heat exchanger piping connections, installation of power cables etc.

The foundation height should not be less than 500 mm.

Construct the foundation, so as to protect the unit or its components against sliding or tumbling over under wind gusts. Check the wind strength for this purpose.

Following the attaching and joining of the air handling unit compact sections, mount the roof sections onto the outer frame ceiling side according to the unit design specification, and seal the roof joints watertight.

The roof is delivered mounted on the unit, no mounting on site is necessary. However, seal the section joints watertight and mount ridge as it is shown on Figure 12.

Figure 12

Check whether the protection grilles and hoods are properly mounted on the air suction and

exhaust openings. If not, install them according to the unit design specification.

Seal watertight all vertical joints between compact sections. All the joints between AHU connections and air ducts must be watertight.

In the case of installing the unit on the roof or at an elevation, arrange for safe access to the unit and construct a thread-on platform as required.

The thread-on platform on the unit servicing side or around the unit should be designed so as to prevent the build-up of snow on the platform in front of the air suction opening, which might result in heavy suction of snow into the unit interior. The platform must be fitted with a safe ascend and descend footpath and should ensure safe operation and maintenance of the unit.

Ridge Rivet 4,8x10



4 Functional sections

Access to the elements - doors with handles: - Open the cover of the handle (Fig. 13 a,b) - Open the door by pulling the handles (Fig. 14)

Figure 13a

Figure 14

Figure 13b

Access to the elements - panels with blockers: To remove / fasten the blocators use Imbus key size 4 for the blockers (Fig. 15).

Figure 15

4.1 Fan section

4.1.1 Plug fan

The fan (Figure 16) is driven by an electric motor directly, by means of a shaft. The electric motor is installed mounted on the fan frame by means of a base plate.

Figure 16

Fan motor

Fan impeller

Base frame



12

4.1.2 Electric motor connection

Prior to commissioning, check the conformity of the connection parameters specified on the electric load nameplates or in the a/c installation control cabinet with the site power mains parameters.

The electric motor connection shall be carried out by a qualified technician in accordance with the technical regulations and standards, in accordance with the electric design specifications for the building in which the air handling unit with the fan section is to be installed, and following the electric motor manufacturer's instructions. The electric motor grounding is mandatory.

The fan should not be operated with the fan section door open.

Figure 17 Motor connection

4.1.3 Commissioning

Before start-up remove any tools and other material from the section, check the tightness of screw joints and the condition of electric connections, mount all covers and wall panels, removed during the intervention into the section, and close the servicing door and secure them against any unauthorised opening by means of the mechanical lock.

Check:

the fastening of the fan to the frame;

fastening of the rotor and its uninterrupted rotation in the housing;

correct grounding;

correct electric connections and their function;

presence of any tools or other materials in the housing;

fastening of all covers and doors.

4.1.4 Safe operation, testing and maintenance

Prior to any intervention into the fan section, switch off the repair switch of the fan section being the subject of the check, and lock it in the off state to disconnect the power supply to the drive electric motor. The fan should not be operated with the fan section door open.

Proper maintenance is also a guarantee for the safe operation of the unit. Regularly check the tightness of all screw joints, electric connections, grounding and section housing sealing.

Observe the electric motor manufacturer's instruction for the motor maintenance.

Motor connection box located on the bottom of fan unit section (Fig. 17)



Check monthly:

tightness of all screw joints;

impeller run;

fan – electric motor assembly vibration insulators.


Cleaning of parts of the fan in contact with air and also the water drain to maintain functioning

x


4.2 Heater section with water heater

Water connection pipes are made through the insulated panel. Connections are alyaws threaded. The heater coil temperature sensor is mounted inside the heater coil. The connection cable for heater coil temperature sensor has to be connected in a connection box inside the basic unit.

Figure 18 Water heater unit

Fan section checking and maintenance schedule

Action


1 3 6 12 24

According to the

hygiene inspection

Inspect for contamination, damage and corrosion

x

Water connection - out

Water connection - in

Heater coil temperature sensor

Connection cable for heater

coil temperature sensor



14

4.2.1 Installation and commissioning

Depending on the working medium, the heater connection piping and the collector may reach high surface temperatures (over 70°C); therefore, avoid contact with these surfaces when working close to the heater, wear personal protection means (leather gloves), or stop the air handling unit and shut off the supply of hot water and let the heater and the piping cool down prior to any work.

When installing the water heater, make sure to properly connect the piping installation (Figure 19) and observe the following:

Provide the transfer medium / air counterflow configuration.

Connect the piping and fittings so as to allow unobstructed access to and drawing out of the heat exchanger for revision and maintenance works, without obstructing access to the adjacent sections.

When tightening threaded joints, apply counterforce with an appropriate tool (pipe wrench – padded), to avoid damaging the heater piping circuit.

For easier dismounting, connect the heater by means of two pairs of flanges. Do not weld the connection.

Arrange the two piping connections to the water heater observing the air flow direction, so that the air inflow to the heater is closer to the return pipe, to ensure medium/air counterflow. This applies for either horizontal or vertical air flow configuration.

The pump may be installed in either the horizontal or in the vertical piping leg, provided that the pump shaft is horizontal.

The control/distribution or mixing valve may be installed in either the supply or return pipe; the distance between the supply and return pipe and the distance between the control valve and the bypass pipe should not be less than 500 mm.

Upstream the heater intake, install a dirt trap in the supply pipe to protect the control valve and the circulation pump.

In the supply pipe downstream the connection stop valve, at the heater intake and outlet, install thermometers.

At the lowest point of the piping installation, provide drain cocks for the transfer medium, to allow the heat exchanger draining.

At the highest point of the piping system, provide a bleeding device to ensure uninterrupted flow of the medium through the heater (as a rule, the heaters are supplied already fitted with the bleeding valve and drain cock at the highest / lowest point of the collector / distribution pipe).

Clean the piping system of filings and other debris.

Figure 19 Water heater installation



Prior to the commissioning, check:

the tightness of different screw joints; tighten them as required;

proper operation of the heater automatic anti-freezing protection – prior to the filling of the heater with the circulation medium;

tightness of piping connections;

proper operation of the automatic heating medium supply shut-off function, designed to protect the electric motor against overheating, at the heating medium temperature exceeding 70 °C.

4.2.1.1 Filling and draining procedure – transfer medium: warm, hot water

Filling:

partly open the transfer medium supply valve; let the fin register to heat up or cool down uniformly to avoid thermal stresses;

fully open the transfer medium supply valve;

bleed the system to ensure its achieving the full rated thermal capacity;

switch the fan on.

Draining:

close the medium supply valve;

slowly open the drain cock until the heat exchanger is depressurised; then fully open both the bleeding valve and the drain cock.

4.2.2 Operation

In the event of the air temperature falling below the set value, the thermostat and the automatic controller shall carry out the following operations:

switch the fan off;

close the fresh air control louvres;

fully open the heating medium valve;

switch on the circulation pump, if not already on.

4.2.3 Maintenance

Prior to any intervention in the water heater, shut the entire air handling unit down by switching off the main switch on the electric control cabinet. Lock the switch in the off position. Prior to the startup, clean the device’s interior and firmly attach and seal all air joints (covers, duct flanges, guards etc.). To ensure proper functioning, regularly carry out the following operations:

Check the tightness of all water connections and air joint tightness.

Check the operation of the bleeding valve. In an event of disturbed medium flow through the exchanger, or presence of air in the circuit, bleed the piping system.

Check the proper operation of the heater automatic anti-freezing protection.

Periodically, check the proper operation of the heating medium supply automatic shut-off upon the unit shutdown.

To prevent the electric motor overheating, check the fan prolonged operation (at least 3 minutes). following the unit shutdown.



16

Regularly check any dust build-up on the heater fins. Dust or scale build-up on the fins result in a reduced heat exchanger capacity. Periodically – approximately every 500 hours of operation – clean the fins. Clean the fins by blowing compressed air in the direction opposite to the air flow direction. If this cleaning method is not sufficient, dismount the heater and wash it with low pressure water or steam. Do not use high pressure water or steam, to avoid deforming the aluminium fins. When washing with water, the water pressure shall not exceed 15 bar, and the water jet shall be strictly perpendicular to the fin surfaces. Water jet at an angle will damage the fins. This applies in particular for the fins along the edges, which are more sensitive. Never use any hard object for cleaning.



4.3 Heater section with electric heater

Heating unit with electric heater consists of a unit housing, electrical air heaters and cabinets with the associated control elements (Figure 20).

Figure 20 Electrical heater


Connect electric cables through cable sleeves in the junction box wall; make sure that their laying does not obstruct the servicing of the adjacent functional sections of the air handling unit.

Air flow velocity across the heater shall not be less than 1,5 m/s; the air flow shall be evenly distributed across the entire cross section.

The electric air heater shall start only with the fan already running and an adequate air flow volume established.

Upon the heater switching off, the fan shall continue to operate for another at least 3 minutes to cool down the heater coils.

Water heater section checking and maintenance schedule

Action



Inspect for contamination, damage and corrosion x

Electrical heater housing

Heaters elements

Junction box



The electric air heater is not of a water-tight construction; hence the electric heater section shall not be installed so as to be exposed to water or steam.

4.3.2 Operation

Connection of the electric heater to the mains shall be done by a properly qualified electrician, in conformance with the applicable regulations

Heaters are connected to a 3×400V or 2x400V power supply

During operation, their surface of heating elements reaches temperatures up to ~ 350 °C

4.3.3 Maintenance

Prior to any intervention in the electrical air heater, shut the entire air handling unit down by switching off the main switch on the electric control cabinet. Lock the switch in the off position. Prior to the startup, clean the device interior and firmly tighten all electric connections, seal all air joints and attach guards (covers, duct flanges, protection grilles etc.).

Once a month, check:

tightness of electric connections and joints;

operation of the air flow rate monitoring device;

operation of the relays for the early switching on of the fan and the delayed switching off of the electric heater;

proper and secure attachment of the guards (servicing cover, connection box cover, protection grilles etc.).

4.4 Cooling section with water cooler

Water connection pipes are made through the insulated panel. Connections are always threaded.

Figure 21 Water cooler unit

Stoppers

Water cooler

Drain pan

Water cooler cover

Handle

Siphon



18


Make sure an adequately sized siphon is installed in the condensate collection pan drain line. The method of connecting the piping to the heating circuit depends on the piping diameter, as follows: When installing the water cooler, make sure to properly connect the piping installation and observe the following:

Provide the transfer medium / air counterflow configuration.

Connect the piping and fittings so as to allow unobstructed access to and drawing out of the heat exchanger for revision and maintenance works, without obstructing access to the adjacent sections.

When tightening threaded joints, apply counterforce with an appropriate tool (pipe wrench – padded), to avoid damaging the cooler piping circuit.

For easier dismounting, connect the water cooler by means of two pairs of flanges. Do not weld the connection.

Arrange the two piping connections to the water cooler observing the air flow direction, so that the air inflow to the cooler is closer to the return pipe, to ensure medium / air counterflow. This applies for either horizontal or vertical air flow configuration.

The pump may be installed in either the horizontal or in the vertical piping leg, provided that the pump shaft is horizontal.

The distribution or mixing control valve, if specified, may be installed in either the supply or the return line. The distance between the supply and return pipe and the distance between the control valve and the bypass pipe should not be less than 500 mm.

Upstream the cooler intake, install a dirt trap in the supply pipe to protect the control valve and the circulation pump.

In the supply pipe downstream the connection stop valve, at the cooler intake and outlet, install thermometers.

Install the transfer medium drain cocks at the lowest point of the piping installation. This enables the draining of the heat exchanger.

At the highest point of the piping system, install a bleeding device to ensure uninterrupted fluid flow through the cooler. As a rule, the water cooper is delivered with the bleeding / draining valves already installed at the highest / lowest point of the distribution / collection pipe.


An example of proper connection is illustrated in Figure 22.

Figure 22 Water cooler installation




the tightness of different screw joints; tighten them as required;

proper operation of the cooler automatic anti-freezing protection – prior to the filling of the cooler with the circulation medium;

tightness of piping connections;

cleanliness of the piping system and the installation of the dirt trap.

4.4.1.1 Filling and draining procedure:

Filling:

fully open the transfer medium supply valve;

bleed the system to ensure its achieving the full rated cooling capacity;

switch the fan on. Draining:

close the transfer medium supply valve;

slowly open the drain cock until the cooler is depressurised; then fully open both the bleeding valve and the drain cock.

4.4.2 Operation

Protection of the cooler against freezing

a) Cooling circuit filled with water:

anti-freezing protection by means of the anti-freezing protection function of the heater section which shall be installed upstream the cooler section;

anti-freezing protection is provided by fully draining the system before the cold (winter) period of non-operation.

b) Cooling circuit filled with glycol and water mixture:

anti-freezing protection is provided with an appropriate concentration of the glycol and water mixture. In handling glycol, observe the glycol filling safety sheet.

In an event of a prolonged power blackout, the unit shutdown or interruption of the cooling medium supply, drain the cooler to avoid its freezing. To further eliminate the risk of freezing, blow the pipe register with compressed air after draining.

4.4.3 Maintenance


Functionally test the siphon x

CIean wet cooler, demister and condensate tank x


Water cooler section checking and maintenance schedule

Action




Inspect wet coolers, condensate tanks and demisters for contamination, corrosion and functioning

x



20

4.5 Direct evaporator

DX may be divided into two or more cooling circuits and cools the air by means of a freon based cooling medium R 407c or R 410a).


When installing a DX section, make sure to properly connect the piping installation and observe the following:

Connect the piping and fittings so as to allow unobstructed access to and drawing out of the cooler for revision and maintenance works, without obstructing access to the adjacent sections.

When tightening threaded joints, apply counterforce with an appropriate tool (pipe wrench – padded), to avoid damaging the DX piping circuit.

Arrange the two piping connections to the DX observing the air flow direction, so that the air inflow to the DX is closer to the return pipe, to ensure medium / air counterflow. This applies for either horizontal or vertical air flow configuration.

The most common joining method consists of soldering; connection by means of fast joints is even more preferable, since this method saves operational costs associated with blade cleaning. The evaporator outlet pipe should be thermally insulated with the insulation fitted with vapour stopping according to applicable standards.

Install the thermostat expansion valve following the manufacturer's instructions, to a horizontal piping leg as close as practicable to the DX, upstream the pressure equalisation equipment and at a proper angle according to the pipe thickness. The sensor shall be insulated to avoid the ambient air interference with the measurement. The same applies to the pressure equalisation valve sensor. Application of external pressure equalisation valves is recommended, to avoid the interference of the pressure drop across the evaporator.

The distribution head should be mounted vertically; if this is not practicable, make sure to install Venturi head.

Since the evaporator is not fitted with blade defrosting, arrange the electric connection so as to prevent the compressor from operating with the DX fan not in operation. If larger inlet air temperature variations (higher share of outside air) are expected during the DX operation, i.e. the DX operation at loads lower than the rated load, we recommend the installation of a cooling capacity controller with a hot DX bypass line to prevent blade freezing.


In the connection of a DX to a compressor-condenser section, the required accessories include, in addition to a thermal expansion valve:

a drying cartridge;

a solenoid valve (high-low pressure boundary);

inspection opening;

collection pan, in particular in cases of long piping installations. In the laying of pipelines, pay attention to oil return and other freon flow associated phenomena. An example of proper connection is illustrated in Figure 23.



9109 8 67

3

4

5

2 1

1. distribution head 2. thermostat expansion valve 3. temperature sensor 4. TEV capillary

5. pressure equalisation line 6. moisture indicator 7. solenoid valve

8. drying cartridge 9. collection pan Rotolock valve 10. collection pan

Figure 23

The cooling system connection and filling with the cooling medium may only be carried out by a qualified person. Apply copper pipes for the connection, the pipes having been cleaned, dried, purged with dry nitrogen and sealed on both ends. Observe the following points during the installation:

the maximum allowable distance of the DX to the other cooling circuit part is 25 m;

the condenser may be located maximum 2 m below the compressor;

the outlet piping layout should be along the shortest practicable route, with the minimum number of bends (bend radius R > 3.5 times pipe diameter).

In selecting the combination, pay attention to the compatibility of the compressor, the DX and other cooling circuit components.


the conformance of the electric connection with the electrical switching diagram

the condensate outlet

the successful completion of the freon line testing, drying, connection to an air cooled condenser and filling with cooling medium

proper setting of the cooling circuit protection elements, such as the high/low pressure protection switch. The same applies to the condensation pressure control switch

During the commissioning, check:

tightness of the soldered joints

adequate quantity of freon (no droplets in the inspection opening)

dryness of the equipment (inspection opening – colour indicator; dry – moist; following the manufacturer's instructions)

achievement of the proper evaporation and condensation pressures

During the commissioning, make sure that the sump heater heats freon enough to ensure the evaporation of any accumulated liquid freon (continuous operation during the unit shutdown or switching on preceding the unit startup).



22

DX filling

Prior to the filling, vacuum the system. The vacuuming should continue until the piping system is dry and a proper vacuum is established (see instructions for the filling of cooling systems). Normally, the system is filled through the compressor suction connection – larger compressors are fitted with special connectors. Having opened the freon cylinder valve to admit the gas to the system, start the compressor and continue the filling until the specified evaporation pressure is achieved and no more bubbles are seen in the inspection opening.

DX evacuation

Shut off the compressor-condensation section isolation valves and exhaust freon from the DX section through a valve fitted specifically for this purpose (employing an environment compliant exhaust equipment according to the Montreal protocol).

4.5.2 Operation

Observe the instructions for safe operation, starting and maintenance of cooling equipment, which are included in these instructions.

4.5.3 Maintenance

Prior to any intervention in the DX, shut the entire air handling unit down by switching off the main switch on the electric control cabinet. Lock the switch in the off position. Prior to the startup, clean the device interior, firmly attach and seal all air and water joints (covers, duct flanges, guards etc.) and install the drain siphon and connect it to the sewage system. To ensure proper functioning of the DX, regularly carry out the following operations:

check the condition of the soldered joints

periodically, check the inspection opening for bubbles and humidity

check the cooling circuit protection elements – mechanical and electrical

in a case of a prolonged shutdown, check the operation of the compressor sump heater

check the DX fan operation

regularly check dust build-up on the DX fins. Dust or scale build-up on the fins results in a reduced heat exchanger capacity. Periodically – approximately every 500 hours of operation – clean the fins. Clean the fins by blowing compressed air in the direction opposite to the air flow direction.

If this cleaning method is not sufficient, dismount the heat exchanger and wash it with water or low pressure steam. Do not use high pressure water or steam, to avoid deformation of aluminium fins. When washing with water, the water pressure shall not exceed 15 bar, and the water jet shall be strictly perpendicular to the fin surfaces. Water jet at an angle will damage the fins. This applies in particular for the fins along the edges, which are more sensitive. Never use any hard object for cleaning.


Direct evaporator section checking and maintenance schedule

Action




Inspect wet direct evaporator, condensate tanks and demisters for contamination, corrosion and functioning

x




Ciean wet direct evaporator, demister and condensate tank

x


4.5.4 Outlet siphon

4.5.4.1 Sizing and installation

Difference between the pressure inside the section and the atmospheric pressure p (Pa):

p = pn – pz pn = pressure in the section pz = atmospheric pressure

The following cases are possible:

p < 0 – negative pressure in the unit

p = 0 – pressure in the section equal to the atmospheric pressure

p > 0 – positive pressure in the unit An undersized siphon leads to jerky outflow of air and water.

If the available height difference from the drain pipe connection point to the machine room floor is less than the required siphon height, lead the condensate outlet deep into an outlet funnel.

Do not connect the negative pressure and positive pressure siphon drain pipe directly to the sewage system piping. The outflow of condensate from the siphon to the sewage piping shall be free, through an open funnel.

Never connect a positive pressure siphon and a negative pressure siphon to a common drain pipe.

Mount the siphon on the section outside. Outflow piping should be laid at a minimum 2% inclination in the outflow direction.

Figure 24 Negative pressure siphon

The measure "A" corresponds to the total pressure drop in the section, specified in the section nameplate or in the fan nameplate. Divide the nameplate readout value (in Pa) by 10 to obtain the measure "A" in mm.

C* Required foundation height for proper operation of the siphon.

Prior to the startup, make sure to flood the siphon with water. Flood it every beginning of the summer season, prior to the startup of the air handling unit.



24

115

385

maks. 285

75 80 230

Figure 25 Negative pressure siphon with ball

The negative pressure siphon (Figure 25) does not require flooding with water, since the siphon automatically fills up with condensate as this starts to accumulate.

Figure 26 Positive pressure siphon

The measure "A" corresponds to the total pressure drop in the section, specified in the section nameplate or in the fan nameplate. Divide the nameplate readout value (in Pa) by 10 to obtain the measure "A" in mm.

C* Required foundation height for proper operation of the siphon.

Prior to the startup, make sure to flood the siphon with water. Flood it every beginning of the summer season, prior to the startup of the air handling unit.

Figure 27 Positive pressure siphon

The positive pressure siphon Lindab (Figure 27) does require flooding with water.

4.6 Filter section

Types of filters:

Panel filter: F7 on supply and M5 (optional: F7) on exhaust air; length 96 mm

Bag lilter: F7 on supply and M5 (optional: F7) on exhaust air; length 300 mm



Figure 28 filter unit

4.6.1 Number of filter cells per unit cross section, by unit sizes for horizontal version

Filter cell dimensions

Air handling unit size

1000

2000

3000

4000

6000

8000

1000

0

592 x 490 1

592 x 592 1 2 2 2 3 3

592 x 287 1 1 3 4

287 x 287 1

4.6.2 Number of filter cells per unit cross section, by unit sizes for vertical version

Filter cell dimensions

Airhandling unit size

1000

2000

3000

495 x 495 1 2

495 x 622 1

495 x 393 1

filter

guide

sealing tape

lock section



26


If not already installed, insert the filters into the structural frame, according to the following procedure:

insert filters into the structural frame

push the filters by means of the lock section against the guide with the sealing tape applied

make sure that sealing tape is applied to the L section against which the door will lean, and apply the tape onto the door as well if required

remove any tools and other solid particles from the section

close the servicing door

check the connection of pressure gauge pipes to the pressure measurement outlets and connect as required.

4.6.4 Operation

The filter shall keep its efficiency throughout its service lifetime. To ensure its functionality regarding the hygiene of the handled air, periodically check filters in each filter stage for:

pressure drop

operating hours

visual appearance (check any cracks in the filter material, leakage between the filter and its frame)

In a case of any contamination, cracks in the filter material or leakage between the filter and its frame, replace the filter regardless of the actual pressure drop or lifetime stage.

4.6.5 Maintenance

Replace the filter in the following cases:

the allowable pressure drop has been reached

the service lifetime has been reached

the filter performance is inadequate, in mechanical or hygienic terms

during the installation or modification of the air handling unit, the filter has been contaminated

the replacement is ordered by the hygiene inspection All the filters of a filter stage or filter section shall be replaced at the same time. Replacing of only one filter of a filter stage is allowable only in a case of damage and provided that the time since the last replacement does not exceed 6 months. Prior to installing new filters, always check the complete, uniform and air-tight mounting of the sealing tape on the sealing seat between the filter and its frame. Make sure the filter is not damaged upon installation in the filter frame. Only use filters declared conformant with the SIST EN 779 standard by their manufacturers. Handle the contaminated filters in compliance with applicable environment protection regulations. With outdoor installation air handling units, there is a risk of the filter stage (prefilter) clogging with snow in extreme climate conditions. There is also a risk of filters freezing. In such an event, immediately clean the filters of snow or replace. Connect the pressure gauge to the measurement outlets upstream and downstream of the filter. The filter change procedure is as follows:

open the servicing door

loosen all the lock section(s) (Fig.29)

withdraw the contaminated filter (Fig.30)

clean the section housing as required



check the condition of the sealing tape on the sealing seat and repair or replace it as required

always install fresh and undamaged filters only

push all the lock section(s) on the filters again

close the servicing door

Figure 29 Figure 30 The checking and maintenance shall be done according to the schedule set out in the following table. Procedure for bag filter installation is the same as it is described above.

Note: type of filter must be defined at unit selection. Later it is not possible to replace type of filter (bag with the cassete or inversely).

Figure 31 Bag filter

Filter section checking and maintenance schedule

Action



Inspect for impermissible contamination and damage (Ieaks) – Replace the defective air filter if the most recent filter stage replacement took place less than 6 months ago, otherwise replace the complete filter stage

x

Check the differential pressure x

Filters x




28

4.7 Counterflow plate recuperator

Figure 32 Counterflow plate recuperator unit


Prior to the commissioning, check the tightness of different screw joints and tighten them as required. Also check the fitting and linking of the control louvre to the electric motor drive and its operation. Make sure an adequately sized siphon is installed in the condensate collection pan drain line.

4.7.2 Maintenance

Regularly clean the plate recuperator. In a case of fouling with dry dust, the insert can be cleaned without dismounting, by blowing it with compressed air with a pressure up to 10 bar maximum through the servicing openings; always wear personal protection equipment during such an operation. If fouled with greasy or sticky debris, the insert shall be withdrawn from the recuperator section housing and cleaned by means of a hot water jet (temperature up to 90 oC, pressure up to 6 bar) with appropriate cleaning detergent added. Since the insert filler is made of very thin aluminium foil, be careful not to damage the insert face surface during dismounting. The sequence of dismounting an insert from the section housing is as follows – Figure 33:

remove the servicing covers at backside

remove the partition sections on the backside side, by unscrewing the fixing screws

remove the rubber seal

unscrew the top guide section fixing screws, loosen the side guide section screws and remove the top guide section

draw the insert out of the section housing

after cleaning, install the inserts back in the section in the opposite order

Plate recuperator

By-pass damper

Motor drive

Condensate collection and draining pan

By-pass

Electro control cabinet



Figure 33 Removal of counterflow plate recuperator




Plate recuperator section checking and maintenance schedule

Action




Check the seal between the incoming air and outgoing air

x

Inspect the condensate tank and demister for contamination, corrosion and functioning

x



30

5 Controls

5.1 Sensors

Figure 34

Figure 35

Figure 36 Figure 37 Figure 38

Humidity sensor for measuring outlet/room humidity

Sensor for measuring outlet/room CO2 . It also measures room temperature.

Differential pressure switches for fresh and outlet filters.

Pressure sensors unit with two differential pressure sensors. In CompAir it is used for measuring pressure in duct and also for measuring air flow of inlet and outlet fans. Communication with controller is via EXOline communication.

Tube connector for measuring duct pressure. User has to connect the attached tube to connector. The other end has to be connected to outlet air duct. The same procedure is required on inlet side. Inside Compair, tubes must be connected

to inside connectors.



Figure 39 Figure 40

Figure 41 Actuator for the dampers:

Figure 42

Temperature sensor for inlet air temperature. It has to be connected in the connection box located behind supply fan (green connector – Fig.40).

Hygrostat switch



32

5.2 Functional diagram with counterflow heat exchanger

Figure 43

Valve size depends on unit size.

5.2.1 Functional description

The duct temperature sensor measures air temperature in the room and the controller N1 compares this value to the desired value. In the case of a downward deviation (heating) followed by control output signals, the controller starts to open the bypass dampers of the plate recuperator, then opens the heater valve and turns on the water heater pump. The pump runs for few minutes after the valve has been closed. In case of upward deviation (cooling) the plate heat exchanger is activated (the recuperator by-pass damper opens, depending on the ambient temperature and outside temperature) and the cooling valve opens. The duct temperature sensor measures the value of the supply air temperature and the controller N1 compares this value to the desired value. In case that the measured supply temperature is lower or higher than the lower or upper limit values set in the controller N1, the controller starts to regulate the supply air temperature (limiting temperature between set Tmin - 16 ° C and T max - 40 ° C). The duct temperature sensor is used for measuring of the outside temperature.

5.3 Functional element regulation

5.3.1 Electrical preheater regulation

Electrical preheater is used to preheat outside air to specific value (setpoint). Setpoint (it can be set from 5°C to 30°C) can be set in controller, then it is compared with sensor value (sensor measures temperature behind preheater). If temperature is too low, electrical preheater is turned ON and works until setpoint is reached. Safety thermostat is used to prevent damage from overheating. First point of safety thermostat is set to 80°C, second on 110°C.

5.3.2 Heat exchanger regulation

The outside temperature is measured with NTC sensor. Exhaust/outlet temperature is measured with NTC sensor. Both sensors send signal to controller, where both values are compared. Thus the temperature value of outside and outlet air is estimated. In dependance of this estimation, output signal is lead to the actuator of plate heat exchanger. Maximum of disposable energy (of outside or outlet air) is used. In case of heat energy additional signal is lead to electric preheater and/or water heater (if electric/water heaters are installed into the unit).



5.3.3 Filters

Filters are used as protection against dirt particles inside of the air handling unit, ensuring clean air. Filters are controlled by pressure switches, additionally, the alarm »check filters« is shown every 1000 working hours. In case of filter replacement the direction of air flow through filters must be considered.

Air handling unit must be turned off at the time of filter replacement!

5.3.4 Heater frost protection

The frost protection sensor measures the temperature after water heater. If at any point the temperature of water falls below the set value (5 ° C), the controller reports an error, the heater valve is fully opened, heater pump is turned on, both fans are turned off, dampers are closed. When the error is fixed, the air conditioning switches on automatically and the error is automatically reset.

5.3.5 Frost protection of plate exchanger

Frost protection sensor is designed to measure the temperature value behind recuperator. If the temperature falls below set value, the controller will close recuperator dampers and open by-pass dampers so that the cold outside air will go directly into the room and warmer inside air will defrost recuperator dampers.

5.3.6 Inlet and outlet fan

EC fans are driven by a reference signal (0-10V), which is sent from the controller. The controller has two speed options. Fans can also be driven by CO2 sensor (mounted in duct or room) or by pressure sensors (constant pressure or airflow in duct).

Figure 44 Temperature sensor NTC060HP00 Figure 45 Pressure sensor

Figure 46 Duct CO2 sensor Figure 47 Graphic display



34

5.4 Managing with air handling unit

The main switch on the front side of electro cabinet must always be in ON position, because only in that case you may be assured that the controller and all safety functions work correctly.

FOR SERVICE ON ANY PART OF AIR HANDLING UNIT SUITABLE FUSE MUST BE TURNED OFF (check wiring diagram)!

5.4.1 Displays

The controller is delivered together with a display as standard, which allows easy monitoring and changing of all parameters of the compact air handling unit. Figure 48 Controller Figure 49 Standard display

Figure 50 Swipe&Touch Display

The Swipe&Touch display can be used as a remote display and is delivered in case of ordering of the Advanced controls version. It's used for local monitoring and control of the main functions of the unit.

5.4.2 Connection to external units

Connection is possible to external units such as DX coolers, humidifiers or electrical heaters. The air handling unit can control such external units with analog and digital signals.

5.4.3 Connection to cloud

If advanced option is chosen, the cloud solution is possible – the documentation is made separately.



Figure 51

6 Use of controller and display

6.1 LED

There are two LEDs on the front: The alarm LED marked with the symbol. The “write enable” LED

marked with the symbol.

The four LEDs placed next to the upper terminal strip will be described later.

6.2 Buttons

Figure 52

There are seven buttons: four arrow buttons which will be called UP, DOWN, RIGHT and LEFT. The menus in the Regula are organized in a horizontal tree structure. The UP/DOWN buttons are used to move between menus at the present menu level. The RIGHT/LEFT buttons are used to move between menu levels. When changing parameters the UP/DOWN buttons are used to increase/decrease the value of the parameter and the RIGHT/LEFT buttons to move between digits within the parameter. • The OK button is used to confirm the choice of a parameter setting.

• The C button is used to abort an initiated parameter change and restore the original value.

• The ALARM button, marked with a red button top, is used to access the alarm list.



36

6.3 Navigating the menus

The choice of access level/user access determines which

menus are shown in the menu system. The start display, the display normally shown, is at the root of the menu tree. Pressing DOWN will move you through the menu choices at this, the lowest level. UP will move you back through the choices. Which menus are shown depends on which access level you are using. Using Normal access, the access which normally does not require logging on, only a few basic menus are shown.

In the menu "Running mode", you can view and set the unit’s running mode, view selected control functions and view the alarm events.

In the menus "Temperature", "Air control" and "Humidity control", you can view actual values and setpoint values. Setpoints can only be changed if you have Operator or Admin access.

In "Time settings", the time, date and set running times are shown. Values can only be changed if you have Operator or Admin access.

Without logging on to Operator or System level, you are only authorised to change the unit’s running mode and acknowledge alarms.

With Operator access, you can access more information and change other operation parameters like setpoints and time functions.

With Admin access, you have full access to the complete menu system and can change all parameters.

To enter a higher menu level, use UP or DOWN to place the display marker opposite the menu you wish to access and press RIGHT. At each level there may be several new menus through which you may move using the UP and DOWN buttons.

Sometimes there are further submenus linked to a menu or menu item. This is indicated by an arrow symbol at the right-hand edge of the display. To choose one, use RIGHT again. To back down to a lower menu level, use LEFT.

6.4 Changing parameters

In some menus there are parameters that can be set. This is

A quick blinking (2 times/s) indicates that the parameter can be changed using the present user access.

A slower blinking (1 time/s) indicates that a higher user access is required to change the parameter.

To change a parameter, first press the OK button. If you need higher authority than you have to change the parameter, a log on menu will be displayed, see chapter eight below. Otherwise, a cursor will appear at the first settable value. If you wish to change the value, do so by pressing the UP and DOWN buttons.

In numbers containing several digits you can move between the

Running mode

Temperature

Air control

Humidity control

Time settings

Access rights



digits using the LEFT / RIGHT- buttons.

When the desired value is displayed press OK.

If there are further settable values displayed the cursor will automatically move to the next one. To pass a value without changing it, press OK.

To abort a change and return to the initial setting, press and hold the C-button until the cursor disappears.

6.5 Running mode

Collected here are a number of menus showing running mode, selected functions, alarm events and status of inputs and outputs.

6.5.1 Running mode, unit

The unit’s running mode can be changed without logging on.

6.5.2 Selected functions

Shows the present configuration. These are read-only menus. No changes can be made here.

Running mode

Selected functions

Alarm events

Input/Output

Running mode

Temperature

Time settings

Access rights

Running mode

Auto

Running time

SAF: 14.6 h

Running time

EAF: 14.6 h

Control function

Cascade room ctrl

Fan control

Frequency manual

Heating: Water

Exchanger: Plate exc

Cooling: Dx



38

6.5.3 Alarm events

Alarm log which contains the 40 latest alarm events. The most recent event is listed first. The alarm log can only be used for viewing the alarm history.

6.5.4 Inputs/outputs

This is a read-only menu block showing the present values for all configured inputs and outputs. If correction factors have been applied to input values, the corrected values will be shown.

This is a read-only menu. No changes can be made here.

6.6 Temperature

Here you can view all actual and setpoint values for temperature control. The menu is visible to all users, regardless of log on level. However, to make changes you need at least Operator authority.

The below menus are available, providing the corresponding input has been activated.

Setpoints are available with a separate value for reduced speed. This is achieved using a temperature offset when the unit runs in

Fire damper funct

Not active

Operation when alarm

Stopped

Free cool active: No

Support control

Active: No

CO2/VOC active

Never

Frost protection

Active

Cooling recovery

Yes

External setpoint

Not active

24 Nov 14:32

Malf. SAF

B

Acknowledged

AI

DI

UI

AO

DO

Running mode

Temperature

Time settings

Access rights



reduced speed.

The temperature is available in either Celsius (°C) or Fahrenheit (°F).

6.6.1 Setpoint

Control mode: outdoor temperature-dependent supply or extract air control.

In control mode six, the setpoint is used when cascade connected extract air control is active. Submenu for setting the min. and max. limitation temperatures for the supply air.

6.6.2 Frost protection temperature

6.7 Deicing exchanger

6.7.1 Heat exchanger efficiency monitoring

6.8 Air control

If cascade control

max/min supply

setp Max: 40.0°C

Min: 16.0°C

Frost protection

Actual: 30.9°C

Deicing exchanger

Actual: 11.2°C

Setp: -3.0°C

Hysteresis: 1.0°C

Efficiency exch

Actual: 93%

Output exchanger

Actual: 100%

Extract air temp

Actual: 21.0°C

Setp: 22.0°C ->

Frequency control

manual SAF

Output: 75%



40

6.8.1 Manual frequency control saf (there are corresponding menus for eaf)

Submenu "Setpoint"

Submenu "Outdoor compensation"

Submenu "Extra compensation curve"

Submenu “Controller output compensation if cooling”

Submenu “Controller output compensation if heating”

The compensation follows the current control quantity, in this case %. The function should not be used when fan setpoint is set to %, as the fans will then risk stopping in some modes.

Submenu “Controller output compensation”

Submenu “Compensation only when”

6.9 Time settings

6.9.1 General

Regula has a year-base clock function. This means that a week-schedule with holiday periods for a full year can be set. The clock has an automatic summertime/wintertime change-over.

Individual schedules for each week-day plus a separate holiday setting. Up to 24 individual holiday periods can be configured. A holiday period can be anything from one day up to 365 days. Holiday schedules take precedence over other schedules.

Each day has up to two individual running periods. For two-speed fans and pressure controlled fans there are daily individual

Compensation only

when:

1/1-speed: No

defrosting: No

Controller output

comp if heating

0 at HCOUT= 0%

100 at HCOUT= 0%

Comp sens:Roomtemp1

15 °C = 0 %

20 °C = 0 %

25 °C = 0 %

Frequency control

manual SAF

Output 1/1: 75%

Output 1/2: 50%

Outdoor comp. outp.

-20 °C = 0 %

10 °C = 0 %

Act comp: 0 %

Controller output

comp if cooling

0 at HCOUT= 0%

100 at HCOUT= 0%

Controller output

compensation

Not active

Running mode

Temperature

Time settings

Access rights

Time/Date

Timer normal speed

Timer reduced speed

Extended running

Timer output1

Timer output2

Timer output3

Timer output4

Timer output5

Holidays



schedules for normal speed and reduced speed, each with up to two running periods.

Up to 5 digital outputs can be used as timer controlled outputs. Each with individual week- schedules with two activation periods per day. These outputs can be used to control lighting, doorlocks etc.

6.9.2 Time / date

This menu shows and permits the setting of time and date. Time is shown in 24-hour format.

Date is shown in the format YY:MM:DD

6.9.3 Timer normal speed

There are eight separate setting menus, one for each weekday and one extra for holidays. Holiday schedules take precedence over other schedules.

For 24 hour running, set a period to 0:00 – 24:00.

To inactivate a period, set the time to 00:00 – 00:00. If both periods of a day are set to 0:00 – 0:00, the unit will not run at 1/1-speed that day.

If you want to run the unit from one day to another, e.g. from Mon 22:00 to Tue 09:00, the desired running time for both days must be entered.

6.9.4 Timer reduced speed

These settings will be ignored if single speed fans are configured.

Should periods for normal speed and periods for reduced speed overlap, normal speed takes precedence.

There are eight separate setting menus, one for each weekday and one extra for holidays. Holiday schedules take precedence over other schedules. For 24 hour running, set a period to 00:00 – 24:00. To disable a period, set it to 00:00 – 00:00. If both periods of a day are set to 00:00 – 00:00, the unit will not run at "Reduced speed" that day.

Time: 18:21

Date: 04-08-04

Weekday: Wednesday

Normal speed

Monday

Per 1: 07:00 – 16:00

Per 2: 00:00 - 00:00

Normal speed

Monday

Per 1: 07:00 – 16:00

Per 2: 22:00 - 24:00

Normal speed

Tuesday

Per 1: 00:00 – 09:00

Per 2: 00:00 - 00:00



42

6.10 Extended running

Digital inputs can be used to force the unit to start although the timer says the running mode should be “Off”.

For 2-speed fans and pressure/flow controlled fans, inputs for normal speed and reduced speed can normally be used.

The unit will run for the set time. If the running time is set to zero the unit will only run as long as the digital input is closed.

6.11 Holidays

Up to 24 separate holiday periods for a full year can be set.

A holiday period can be any number of consecutive days from 1…365. The dates are in the format: MM:DD.

When the present date falls within a holiday period, the scheduler will use the settings for the weekday “Holiday”.

6.12 Other functions

6.12.1 Alarm handling

If an alarm condition occurs, the red Alarm LED on the front panel of units with display or the Alarm LED on a connected display unit will start flashing. The LED will continue to flash as long as there are unacknowledged alarms.

Alarms are logged in the alarm list. The list shows type of alarm, date and time for the alarm and the alarm class (A, B or C alarm).

To access the alarm list, press the alarm button, the front panel button with the red button-top, on the front of the Regula / E3-DSP.

If there are multiple alarms, this is indicated by up/down arrow symbols at the right-hand edge of the display.

Use the UP and DOWN buttons to access the other alarms.

At the left end of the bottom display line the alarm status is shown. For active, unacknowledged alarms the space is blank. For alarms that have reset the text “Reset” is shown. Acknowledged, still active or blocked alarms are indicated by Acknowledged or Blocked.

Alarms are acknowledged by pressing the OK button. You are then given the choice of acknowledging the alarm or blocking the alarm.

Acknowledged alarms will remain on the alarm list until the alarm input signal resets. The LED is then lit.

Blocked alarms remain on the alarm list until the alarm has reset and the block has been removed. New alarms of the same type will not be activated as long as the block remains.

Since blocking alarms can be potentially hazardous, you need a master user

Class A and B alarms will activate alarm output(s) if these have been configured.

Class C alarms are removed from the alarm list when the alarm input resets even if the alarm has not been acknowledged.

Holidays (mm:dd)

1: 01-01 – 02-01

2: 09-04 – 12-04

3: 01-05 – 01-05

Extended running

60 min

Time in ext running

0 min

Sensor error supply

air temp

24 Aug 10:43 Class:B

Reset



6.13 Indication leds

Status indication can be found in the upper left corner of the master controller. For controllers with display, the alarm indication and change mode LEDs are located in the keypad area.

6.14 Status indication

Designation

Color

Description

Tx Green Port 1, Transmitting

Rx Green Port 1, Receiving

Serv (…LON models) Yellow Service LED LON, commissioning

LAN (…W models) Yellow/Green Green: Connected to other network equipment

Blinking green: Network traffic Blinking

yellow: For identifying

P/B (Power/Battery) Green/Red Power on/Battery error

Controllers with built-in display

Red Alarm indication

Yellow Change mode



44

6.15 Alarms

6.15.1 Alarm list

The alarm text and priority columns show the factory set values.

Alarm text

Prio

Description

1 Malfunction supply air fan B Malfunction supply air fan

2 Malfunction extract air fan B Malfunction extract air fan

3 Malfunction P1 heater B Malfunction pump, heating circuit

4 Malfunction P1 cooler B Malfunction pump, cooling circuit

5 Malfunction P1 exchanger B Malfunction pump, liquid connected exchanger

6 Filter alarm 1 B Filter guard pressure switch or analogue filter switch activated. The analogue filter switch may be flow dependent.

7 Flow guard B Flow switch activated

8 External frost guard A External frost protection thermostat activated

9 Deicing pressure guard - Exchanger de-icing pressure switch activated

10 Fire alarm A Fire alarm activated

11 External switch C "External switch" activated

12 External alarm B External alarm activated

13 Supply air control error B Supply air temp deviates too much from the setpoint for too long.

14 Humidity control error - The room humidity deviates too much from the setpoint.

15 High supply air temp B Supply air temp too high

16 Low supply air temp B Supply air temp too low

17 Supply air temp max limit - Maximum limiting of supply air temp active

18 Supply air temp min limit - Minimum limiting of supply air temp active

19 High room temp B Room temp too high during room temp control

20 Low room temp B Room temp too low during room temp control

21 High extract air temp B High extract air temp during extract air control

22 Low extract air temp B Low extract air temp during extract air control

23 Electric heating is overheated A Heater high temperature limit switch activated

24 Frost risk B Frost protection function is overriding the control of the heater output

25 Low frost guard temp A Frost protection temperature below frost limit value

26 Low efficiency B Heat exchanger efficiency below limit value

27 Sensor error outdoor temp B Malfunction in connected sensor



Alarm text

Prio

Description

28 Analogue deicing - Exchanger de-icing activated by de-icing sensor

29 Rotation sentinel exchanger B Exchanger rotation sentinel alarm activated

30 Malfunction fire damper B Fire damper exercise test failed

31 Supply air fan control error - Supply air pressure deviates too much from the set point for too long.

32 Extract air fan control error - Extract air pressure deviates too much from the set point for too long.

33 Supply air fan external operation

C SAF run-signal received when unit is stopped

34 Extract air fan external operation

C EAF run-signal received when unit is stopped

35 Ventilation manual mode C The unit is in manual mode

36 Manual supply air control C Supply air temp controller in manual control

37 Manual supply air fan mode C Supply air fan in manual control

38 Manual supply air fan freq control

C The SAF is in manual mode

39 Manual extract air fan mode C Extract air fan in manual control

40 Manual extract air fan freq control

C The EAF is in manual mode

41 Manual heater control C The heater is in manual mode

42 Manual exchanger control C Heat exchanger output in manual control

43 Manual cooler control C Cooling output in manual control

44 Manual P1 heater C Heating circulation pump in manual control

45 Manual P1 exchanger C Exchanger circulation pump in manual control

46 Manual P1 cooler C Cooling circulation pump in manual control

47 Manual fire damper C Fire dampers in manual control

48 Internal battery error A Internal battery needs replacing

49 Sensor error supply air temp B Malfunction in connected sensor

50 Sensor error extract air temp B Malfunction in connected sensor

51 Sensor error room temp 1 B Malfunction in connected sensor

52 Sensor error room temp 2 B Malfunction in connected sensor

53 Sensor error exhaust air temp

B Malfunction in connected sensor

54 Sensor error extra sensor 1 B Sensor error Extra sensor 1

55 Sensor error SAF pressure B Malfunction in connected sensor

56 Sensor error EAF pressure B Malfunction in connected sensor

57 Sensor error deicing temp B Malfunction in connected sensor

58 Sensor error frost protection temp


59 Sensor error CO2 B Malfunction in connected sensor

60 Sensor error humidity room B Malfunction in connected sensor

61 Sensor error humidity duct B Malfunction in connected sensor



46

Alarm text

Prio

Description

62 Sensor error extra unit temp B Malfunction in connected sensor

63 Sensor error external control SAF


64 Sensor error external control EAF


65 Sensor error SAF pressure 2 B Malfunction in connected sensor

66 Sensor error outdoor humidity


67 Sensor error intake temp B Malfunction in connected sensor

68 Sensor error extra sensor 2 B Malfunction in connected sensor




72 Sensor error extra SAF pressure


73 Sensor error extra EAF pressure


74 Sensor error backup 8 B Malfunction in connected sensor



77 Alarm frequency converter SAF

A Malfunction of frequency converter SAF

78 Alarm frequency converter EAF

A Malfunction of frequency converter EAF

79 Communication error frequency SAF

C Communication error Vacon NXL/Lenze SMV/Omron V1000/Emerson

80 Alarm frequency converter EAF

C Communication error Vacon NXL/Lenze SMV/Omron V1000/Emerson

81 Communication error expansion unit 1

C Communication problem with connected expansion unit

82 Communication error expansion unit 2

C Communication problem with connected expansion unit

83 Warning frequency converter SAF

C Alarm from frequency converter via Modbus communication

84 Warning frequency converter EAF

C Alarm from frequency converter via Modbus communication

85 Output in manual mode C Analogue or digital output in manual mode

86 Time for service C Time for service

87 Y4 extra sequence control manual

C Y4-Extra sequence in manual control

88 Restart blocked after power- on

B Restart blocked due to earlier power failure

89 Y5 extra sequence control manual

C Y5 Extra sequence in manual control

90 Filter guard 2 B Filter guard pressure switch or analogue filter switch activated. The analogue filter switch may be flow dependent.

91 High temp extra sensor 1 - High temperature extra sensor 1



92 Low temp extra sensor 1 - Low temperature extra sensor 1


Alarm text

Prio

Description








101 Extra alarm 1 - Extra alarm 1 on digital input










111 Extra unit in manual mode - Extra controller in manual mode

112 Malfunction motor control 1 - Malfunction in motor control 1

113 Malfunction motor control 2 - Malfunction in motor control 2

114 Motor control 1 external operation

- External operation of motor control 1

115 Motor control 2 external operation

- External operation of motor control 2



48

6.16 Electrical board

Electrical board is mounted (integrated) on the top of the unit (for unit sizes 1000 – 4000) or mounted on the front side (for unit sizes 6000 - 10000). The electrical board can be drawn out, but not completely.

Figure 53 ECC cabinet

There is a sticker HIGH VOLTAGE on the front of electrical board so when drawing it out, be aware of high voltage! Board should be drawn out only 15 cm max, so that the controller can be seen and parameters can be changed.

Figure 54 Warning sticker

230V/AC to 24V/AC transformer

Fuses for: - heating pump, - supply and extract fan, - power supply for Lindab Regula controller

Lindab Regula controller



6.17 Connecting of display

The screen on the display is a copy of the screen on the controller and is used to facilitate the managing of air handling unit since the controller itself is usually hidden and sometimes hard to access.

6.18 Electrical connection in splitted units

If the air handling unit consists of 3 parts it is necessary for proper operation to connect connectors which are connected to motors, sensors, etc.. before unit assembling. Connect the connectors to each other with the same numbers as shown in Figure 55.

Figure 55 Connector connection in splitted units

Connected connectors must be inserted in a connection box, as shown in Figure 56.

Figure 56 Connectors in connection box



50

Figure 57 Connection box

Figure 58 Connection box - open

Connection box with contacts for: - main power supply, - heater pump power supply, - heating valve, - cooling valve, - fire central, - BMS connection



7 Standard wiring diagram (CF)

The wiring diagram is standard until the unit has an electrical heater or pressure sensors installed inside. In that case, the wiring diagram is different and is always attached with the unit. It can also be sent via e-mail. The standard wiring diagram is always the same, customer must just check the main supply cable and fuses, which are different and depend on unit size.



52



8 Symbols

RADIAL FAN SECTION WATER HEATER SECTION WATER COOLER SECTION PLATE RECUPERATOR

SECTION

ELECTRICAL HEATER SECTION

FILTER SECTION FILTRATION CLASS M5

FILTER SECTION FILTRATION CLASS F7

ELECTRICAL CABINET

DX COOLER SECTION CONTROL LOUVRE HANDLE OPEN POSITION HANDLE CLOSED

POSITION

CONDENSATE DRAINING SIPHON SIZING

HEATING FUNCTION COOLING FUNCTION

MEDIUM ENTRY RED COLOUR

MEDIUM EXIT BLUE COLOUR

MEDIUM ENTRY BLUE COLOUR

MEDIUM EXIT RED COLOUR

AIR FLOW DIRECTION MEDIUM FLOW DIRECTION CONTROL LOUVRE OPEN

CONTROL LOUVRE CLOSED

www.lindab.com

At Lindab we simplify construction for our custo-

mers. We do that by designing easy-to-use produ-

cts and solutions, as well as offering efficient availa-

bility and logistics. We are also working on ways to

reduce our impact on our environment and climate.

We do that by developing methods to produce our

solutions using a minimum of energy and natural

resources, and by reducing negative effects on the

environment. We use steel in our products. It’s one

of few materials that can be recycled an infinite

number of times without losing any of its properties.

That means less carbon emissions in nature and

less energy wasted.

We simplify construction

www.lindab.com

lindab compact air handling unit compair cf

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