specification 3708-3 district heating · pdf filerx1 programmable room thermostat all fitted...

DEDICATED PRESSURE SYSTEMS LTD.

Telephone 01372 803 675 Fax 01372 803 678

Email [email protected] �Internet http://www.heatweb.com

�9-19 Manor Green Road, Epsom, Surrey KT19 8RA

Specification 3708-3 Southwark 2 Bed / 1 Bath District Heating Everest

04/12/01 Copies / revised specifications can be obtained via fax / email

Heat Bank System � Everest combination unit � 14 Plate Heat Exchanger (30 ltr/min) � Indirect � 40mm Foam Insulation � Fitted Primary Controls RX1 Programmable Room Thermostat � All fitted controls are wired � Thermostatic Blending Valve 22mm � Backup Immersion Heater � Cased � Supplied with X100 Inhibitor �

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2��Plate Heat Exchanger 3��Heat Exchanger Pump 4��Flow Switch 5��Thermostatic Blending Valve, Mixcall III 7��Automatic Air Vent 8��Filling Vent 9��Feed to Ball Valve 10��Isolating Valve 11��Y-Pattern Strainer (supplied loose) 12��Overflow 13��Cold Feed / Expansion 14��Immersion Heater 3kW Incaloy with Stat + Overheat 16��Cold Mains In, 22mm 17��Hot Mains Out, 22mm 18��Drain Cock 19��Flow From Boiler 21��Flow to Primary Coil 22��Return from Primary Coil 33��Danfoss Radio Receiver 34� Danfoss TP5 RF Room Thermostat 35a�Zone Valve - Hot Water 22mm 35b Zone Valve - Heating 22mm (supplied loose) 38��Tamperproof Cylinder Thermostat (with Pocket) 39��White Coated Steel Casing 42� Wiring Centre with Immersion Switch + Fuses 63��Sentinel X100 Corrosion Inhibitor

Unit Code EC-130-3708-3 EC-150-3708-3

Capacity [litres] 130 150

Base Diameter [mm] 450 450

Overall Diameter [mm] 530 530

Height [mm] 1190 1330

The Heat Bank come with a 3 metre power supply lead, to be wired into a switched 16amp spur.� ALL other wiring is completed. The wiring centre [42] includes a 13amp fuse for the immersion heater [14], as well as a 3 amp fuse for controls.� Fuses are

surface (screw-driver) accessible allowing inspection and replacement without removal of the wiring centre cover.� A clearly labeled neon switch is provided for user operation of the immersion heater.� The room thermostat [34] communicates with the unit via a digital RF signal removing the need for wiring.� The room stat

receiver [33] provides the user with manual override / control, should the batteries in the room thermostat fail. The central heating zone valve [35b] actuator is wired into the wiring centre [42], to be installed in pipework by installer.

The hot water zone valve [35a] provides an auxiliary switch that can be used to provide the boiler house with a system

demand signal. �


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Specification 3708-4 Southwark 2 Bed / 1 Bath District Heating Everest

25/4/2003

Heat Bank System � Everest combination unit � 14 Plate Heat Exchanger (30 ltr/min) � Indirect � 40mm Foam Insulation � All fitted controls are wired � Thermostatic Blending Valve 22mm � Backup Immersion Heater � Cased � Danfoss RX1 Receiver Back-Plate (wired) Jetseal Ball Valve Supplied with Internal Inhibitor

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2��Plate Heat Exchanger L18-14 3��Heat Exchanger Pump 4��Flow Switch 5��Thermostatic Blending Valve, Mixcall III 7��Automatic Air Vent 8��Filling Vent 9��Jetseal Ball Valve 10��Isolating Valve 11��Y-Pattern Strainer (supplied loose) 12��Overflow 13��Cold Feed / Expansion 14��Immersion Heater 3kW Incaloy with Stat + Overheat 16��Cold Mains In, 22mm 17��Hot Mains Out, 22mm 18��Drain Cock 21��Flow to Primary Coil 22��Return from Primary Coil 38��Tamperproof Cylinder Thermostat (with Pocket) 39��White Coated Steel Casing 42� Wiring Centre 43��Back-Plate for Room Stat Receiver

62��Magnetic Scale Inhibitor 3/4"BSP MI

1.5 litres of Corrosion Inhibitor is supplied, already added into the store, following factory testing of the unit.� Should the unit be drained down after initial filling, fresh inhibitor will be required.

Unit Code CEC-130-3708-4

Capacity [litres] 130

Base Diameter [mm] 450

Overall Diameter [mm] 530

Height [mm] 1190

District Heating Everest


Telephone 01372 803 675 Fax 01372 803 678



Specification 4675-1 No.2 Neckinger Estate, Southwark

11/06/03

Heat Bank System � Everest combination unit � 28 Plate Heat Exchanger (45+ ltr/min) � Indirect � 40mm Foam Insulation � High duty primary coil � S-Plan primary controls � Twin Cylinder Thermostat Arrangement DO NOT USE � Fitted programmer � All fitted controls are wired � Thermostatic Blending Valve, Heatguard 22mm � 28mm Primaries � LWC1 Wiring Centre � Backup Immersion Heater � Cased �

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2��Plate Heat Exchanger 3��Heat Exchanger Pump 4��Flow Switch 5��Thermostatic Blending Valve, RWC Heatguard 22mm 7��Automatic Air Vent 8��Filling Vent 9��Store Filling Point 9��Feed to Ball Valve 10��Isolating Valve 11��Y-Pattern Strainer (supplied loose) 12��Overflow 13��Cold Feed / Expansion 14��Immersion Heater 3kW Incaloy with Stat 16��Cold Mains In, 22mm 17��Hot Mains Out, 22mm 18��Drain Cock 19��Flow From Boiler 28mm 21��Flow to Primary Coil 22��Return from Primary Coil 23��Flow to Heating 28mm 25��By-Pass Connection 22mm 29��Primary Coil Balancing Valve 33��Programmer Danfoss CP715 34� Room Thermostat (supplied loose) 35a�Two Port Zone Valve - Hot Water 22mm 35b�Two Port Zone Valve - Heating 28mm 38��Cylinder Thermostat (with Immersion Pocket)

Unit Code CEC-210-4675-1 CEC-300-4675-1

Capacity [litres] 210 300

Base Diameter [mm] 450 500

Overall Diameter [mm] 530 580

Height [mm] 1720 1900

Everest Heat Bank, Indirect S-Plan


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Specification 4388-2 London Borough of Southwark Under Worktop Xcel Heat Bank GXV100

11/04/02

Xcel Heat Bank System � 28 Plate Heat Exchanger (45+ ltr/min) � Directly heated from remote source � 40mm Foam Insulation � GX-Plan primary controls � Fitted Primary Controls Cased �

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2��Plate Heat Exchanger, L18-28 3��Heat Exchanger Pump, UPS15/50 4��Flow Switch 5�� Thermostatic Blending Valve (1",� pre-set to 8 ��Vent, 3/4"FI (Blanked) 11��Y-Pattern Strainer (supplied loose) 13��Cold Feed / Expansion, 3/4"FI (Blanked) 15� Immersion Heater 3kW with 2 stats 16��Cold Mains In, 22mm 17��Hot Mains Out, 22mm 18��Drain Cock 19��Flow From Boiler, 22mm 20��Return to Boiler, 22mm 23��Flow to Heating Circuit, 22mm 24��Return from Heating Circuit, 22mm 27��Primary Pump, UPS 15/50 34 Room Thermostat 38��Cylinder Thermostat (Tamperproof,� pre-set to 75°C) 39��White Coated Steel Casing 41��Primary Blending Valve Heatguard UF (Pre-set to 4)

42��Terminal Box WB12 with relay

The GX100 Heat Bank provides both mains pressure, temperature controlled, hot water, at up to 40 litres per minute, and 10 bar pressure.� The store also provides fully pumped central heating.The store is very small, capable of hiding under a kitchen worktop, and has very low standing heat losses.� It can however, deliver a full bath in under 4 minutes, with hot water to spare, and follow up with another bath within 15 minutes of the first.� Also, radiators can be brought up to full temperature in under a minute of

turning the heating on.

Mechanical installation consists of simple push fit-pipework connections, and the only site wiring required is connection to the mains electrical supply, boiler and room thermostat.� Being a fully vented thermal store, the system can be installed by installers not qualified to install unvented systems.� As standard, the store is on 24hrs a day, with the room thermostat being the only control the householder need use.� A backup 3kW immersion heater provides backup central heating and hot water in case of boiler failure.� All components are tamperproof.

Unit Code CXC-100-4388-2




Height [mm] 850


Telephone 01372 803 675

Fax 01372 803 678

Email [email protected]

Internet http://www.heatweb.com

SPECIFICATION 3755-1 London Borough of Southwark STS Energy Management

09/05/01

210 litre Grade 3 Cylinder (max 1 bar)

Indirect BS 28mm Coil

Finned 6m Solar Coil

40mm Foam Insulation

Danfoss Y-Plan Controls

PCB Primary Wiring Centre

Fitted Primary Pump, 5m head

Fitted Solar Controls

Resol Delta Pro Solar Controller

All fitted controls are wired

HWS Thermostatic Blending Valve

Backup Immersion Heater � �

1��Cold Feed 22mm

2�� Hot Water Services 22mm

3�� HWS Thermostatic Blending Valve

4�� Isolating Valve

7��Automatic Air Vent

8��Vent

13� Drain Cock

14��Immersion Heater 3kW Incaloy with Stat

19��Flow From Boiler

21��Flow to Primary Coil

22��Return to Boiler

23��Flow to Heating Circuit

26��Primary Pump UPS 15/50

29��Primary Coil Balancing Valve

33� Danfoss Programmer CP715

38��Danfoss Cylinder Thermostat�

35��Danfoss Three Port Mid Position Valve

36� Danfoss RF Radio Rom Thermostat

37� Danfoss RX1 RF Receiver Unit

38� Automatic By-Pass Valve

39��White Coated Steel Casing

42��Wiring Centre

48��Check Valve

49��Solar Drain Point

50��Solar Pump� UPS 15/50

51��Flow from Solar Panels

52��Return to Solar Panels

53��Resol Solar Controller

54� Flow Meter

73��Sensor Points

80��Solar Filling Point

81��Dosing Pot Connection

Unit Code ECON-3755-1




Height [mm] 1550


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R/O Shops, 9-19 Manor Green Road, Epsom, Surrey KT19 8RA

SPECIFICATION 2023-2 Wicken Engineering / Slough Borough Council

20/4/01 �

Stowaway advanced Heat Bank System Manual Fill - No Overflows 40mm Foam Insulation with Casing HWS Heat Exchanger (100kW)� HWS Blending Valve� Primary Heat Exchanger (14kW peak) � Directly Pumped Heating Circuit �

Fitted Primary Pumps All fitted controls are wired � Low Water Level Indicator� Blanked Immersion Heater boss � Coated Steel Casing, with Film Cover Heat Meter, Class C with Impeller� Differential Pressure Control�

1��Integral Expansion Vessel�(18 ltr) 2a� HWS�Plate Heat Exchanger 2b�Primary Plate Heat Exchanger 3��Heat Exchanger Pump UPS 15/50 4��Flow Switch 5��Thermostatic Blending Valve 6��Manual Air Vent 7�� Automatic Air Vent 8��Integral Overflow Chamber 9��System Filling Point 11��Y-Pattern Strainer (supplied loose) 14� Blanked Immersion Boss 2 1/4" 16��Cold Mains In, 22mm 17��Hot Mains Out, 22mm 18��Drain Cock 23��Flow to Heating Circuit 24��Return from Heating Circuit 25� Primary Flow� 26� Primary Return� 27��Primary HX Pump UPS 15/60 28��Heating Circuit Pump UPS 15/60 29� Primary Isolating Valve 30� Motorised 2-Port Valve 33� Programmer 34� Room Thermostat (supplied loose) 38� Cylinder Thermostat� 39��White Coated Steel Casing 40��Tight Fitting Lid 41� Primary Blending Valve 42��Wiring Centre 54��Filling Loop (disconnect after use) 55��Water Level Switch 65��Manual Water Level Test and Drain 70� Flow Meter 71� Class C Heat Meter 72� Temperature Sensors 73� Differential Pressure Control Valve 74� Pressure Sensing Points

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Unit Code SC-130-2023




Height [mm] 1500

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The use of a Primary Plate Heat Exchanger isolates the District Primaries from the Property Primaries, preventing cross-contamination, and allowing effective dosing of individual systems.

A Mains Water Isolating Lever Valve must be fitted within the cylinder cupboard, in clear view and easily accessible. A Strainer (supplied loose) must also be fitted, down stream of the isolating valve, to protect the flow switch [4].

The Wiring Centre [42] is fitted with a neon which indicates when the unit needs topping-up. It is also fitted with a relay to prevent the Heat Exchanger Pump [3] from activating - there will be no hot water available until the unit is topped up manually, using the filling loop [8].

The unit is fitted with a Mixcall III Thermostatic Blending Valve, to control the hot water temperature, and prevent scalding.� The graph shows the pressure drop across the valve for various hot water flow rates.� The Valve is adjustable from 27°C to 67°C, and has a lockable head.

The unit is fitted with an Integral Overflow Chamber [8], which traps small volumes of water discharged as a result of overfilling. Water in the chamber can be drained off via the Overfill Drain Cock [66]. The unit MUST be watched during filling as excessive overfilling will result in over-spill onto the floor.

It is advised that the mains water is tested for hardness. In areas of hard water, we advise the use of a scale inhibitor.

It is important that SENTINEL X100 Inhibitor is used to protect the Heat Bank.� Use 1 litre per 100 litres of stored water. A suitable anti-freeze, such as X500, should also be added when there is a chance that the unit will be left filled and unheated in freezing conditions.


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Specification 5116-1 Wicken Engineering

24/09/02

Heating Distribution Board � �

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1� Quarter-Turn Ball Valve 2� 3/4" Ply Backboard 3� Y-Pattern Strainer 4� Grundfoss 15-60 Pump

5� Two-Port Motorised Valve 6� Lockshield Valve By-Pass 7� Wiring Centre 8� STROMAX-GM Circuit Regulating Valve 3/4"

�


Telephone 01372 803 675Fax 01372 803 678

Email [email protected]

�Internet http://www.heatweb.com

�

17� Manor Green Road, Epsom, Surrey KT19 8RA Company No.: 2963502� V.A.T. No.: 644221955

DPS Ref: 16181

PANDORA CENTRAL BOILER APPLICATIONSample of letter to customer regarding design options.

This Design will: 1. Obtain an 85-55°C drop on primaries for heating, with a fixed flow rate giving 9kW input. 2. Deliver thermostatically controlled mains pressure domestic hot water at up to 24 l/min @ 6 bar. 3. Deliver central heating with a 30 litre buffer, giving rapid initial heat-up. 4. Provide 3kW electric backup to both hot water and optionally heating. 5. Requires no discharge, with store/heating system manually filled. 6� Requires no annual maintenance. �

As we cannot vary the flow to match low load heating, it is not possible to maintain a low return temperature, UNLESS the heating is separated from the input using some storage as a buffer.

The basic idea is that the primaries are only opened for recovery once the bottom 30 litres of the store has dropped below 55°C (as detected by the upper thermostat).� The primaries are then opened to recover the 50°C water up to 75°C. Once the 30 litres has been circulated through and has reached 70°C the lower thermostat turns off the primaries. (the lower stat needs to be set between 55°C and 70°C - say 65°C).

At full load the radiator flow/rtn will be 75/50°C.� Bottom section will circulate once only.� Primaries will open, and if gradually the lower section will reheat as most heat is going straight to central heating.

At low load the initial radiator flow may be 75/40°C. The flow rate will be much lower so it will take a while for the lower 30 litres to be circulated. Once the primaries open, the lower section may recover 40/70°C and recovery will stop. the heating will now continue at say 70/45°C... and the cycle continues. At all times the primary return temperatures should be at or below the desired maximum of 55°C.

Another way of saying same thing...

We are trying to cool down the primaries to below 55°C. Because there is a set primary flow rate, it is not possible to cool the primaries enough at low heating loads unless... We run the heating off stored heat until we have a reservoir of water cool enough to run and cool the primaries to 55°C.

You cannot even do this with a distribution board, unless you are allowed to reduce the primary flow rate to match load using a thermostatic valve.� The thermostatic valves required to get a set point over 65°C are the Danfoss AVTB valve and the motorised valve still used for tight shut-off.

I have shown a motorised two port valve on the primaries. I assume one must be required, and we can fit and wire if needed. Also a room thermostat as this completes the necessary controls (unless a timer is also needed).

The immersion heater can be lowered into the bottom section if you would like backup electric central heating. In the position shown it will be hot water only.

My selection of heat exchange is our largest stock unit the M18-30. This size gets the htg rtn to within 3°C of primary rtn.� Cheaper heat exchangers are available if this temp difference can be increased. Software gives following:

Only issue is flow rate. I believe to make use of any available Grundfos pump,� the flow rate is too low so a by-pass will be required around the pump, to put is somewhere on the curve. This can be a lockshield valve, an auto-by-pass or fixed orifice.� Also, it may be worth having a Tacometer flow gauge on the store flow through the heat exchanger to allow visual indication and setting of flow rate.


Telephone 01372 803 675Fax 01372 803 678

Email [email protected] Internet http://www.heatweb.com

17 Manor Green Road, Epsom, Surrey KT19 8RACompany No.: 2963502 V.A.T. No.: 644221955

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