Worcester WORCESTER GREENSTORE User manual

WORCESTER GREENSTORE
6kW, 7kW, 9kW & 11kW Combi
HEAT PUMP
GB/IE
GB/IE
INSTRUCTION MANUAL
TION, COMMISSIONING
& SERVICING
INSTALLA

2
Table of contents
BUILDING REGULATIONS ..................................................................................................................................3
For the Installer................................................................................................ 5
Important information to the installer................................................................. 6
Technical support ...................................................................................................................................................6
Checklist .......................................................................................................... 6
What the delivery includes ................................................................................ 7
Dimensions and plumbing connections............................................................... 8
The heat pump and collector hose in general....................................................... 9
Transporting the heat pump....................................................................................................................................9
Positioning the heat pump.......................................................................................................................................9
Maximum working temperatures ............................................................................................................................9
Minimum working temperatures.............................................................................................................................9
Fit the filters............................................................................................................................................................9
Collector hose ........................................................................................................................................................10
Installing the expansion vessel ...............................................................................................................................12
Compact collector..................................................................................................................................................13
Connecting the heat pump to the heating system ............................................... 14
Fitting the unvented kit.........................................................................................................................................14
Use in hard water areas ........................................................................................................................................17
Connecting to the heating system without a bypass:................................................................................................17
Connect heat pump Combi model to the heating system .........................................................................................18
Individual temperature control in each room and increasing volume of internal water.........................................19
Filling the heating system......................................................................................................................................20
Filling the collector circuit ....................................................................................................................................20
Connecting the heat pump to the power supply ................................................. 23
Installation of sensors............................................................................................................................................23
External connections to the heat pump ..................................................................................................................24
Connecting the general alarm, external input and softstart ...................................................................................25
Installer and service menu (I/S) ...................................................................... 26
How to use the control panel .................................................................................................................................26
Commissioning the heat pump......................................................................... 27
Manual test run of the heat pump .........................................................................................................................27
Start the heat pump ..............................................................................................................................................27
Menu displays which may need adjustment or checking.........................................................................................28
Drying program for floor screed.............................................................................................................................31
Start the heat pump with only additional heat.......................................................................................................32
Important points to check after start up.................................................................................................................32
Maintenance................................................................................................... 33
Unscrew the front cover ........................................................................................................................................33
Sight glass.............................................................................................................................................................33
Filters ...................................................................................................................................................................34
Protective anode ...................................................................................................................................................34
Expansion vessel....................................................................................................................................................35
What to do if a fault occurs .............................................................................. 36
Menu display dimmed...........................................................................................................................................36
Fuses and reset buttons on the heat pump .............................................................................................................37
All alarms ............................................................................................................................................................37
Technical information...................................................................................... 46

3
Installation manual for the Worcester Greenstore Combi heat pumps
Worcester, 05.02.07
Part number: 8-716-113-342
Issue: b
Copyright © 2007.
BUILDING REGULATIONS
This appliance must be installed and serviced only by a competent person in accordance with the current: IEE Regulations,
Building Regulation, Building Standards (Scotland) (Consolidation), Building Regulations (Northern Ireland), local water
by-laws, Health & Safety Document 63S (The Electricity at Work Regulations 1989), IS 813 (Eire) and other local require-
ments.
The relevant Standards should be followed, including:
BS7074:1 : Code of practice for domestic and hot water supply
EN:12828 : Central heating for domestic premises
BS7593 : Treatment of water in domestic hot water central heating systems
BS EN 14511
BS EN 814
BS EN 378
The Health and Safety at Work Act 1974
The Management of Health and Safety at Work Regulations 1999
The Construction (Health, Safety and Welfare) Regulations 1996
The Construction (Design and Management) Regulations 1994
The Lifting Operations and Lifting Equipment Regulations 1998
Where no specific instruction is given, reference should be made to the relevant codes of Practice.
Potable water:
All seals, joints, compounds (including flux and solder) and components used as part of the secondary domestic water
system must be approved for use with potable water supplies.
This is to certify that the above ranges of products manufactured by BBT Thermotechnology have been tested and found
to comply with –
the requirements of the (Water Fittings) Regulations 1999 for England and Wales, the Water Byelaws 2000, Scotland
and the Water Regulations Northern Ireland.
the requirements of the UK Building Regulations:
The Building Regulations 1991 (England & Wales) Requirements G3, L1 and Regulation 7. The Building Standards
(Scotland) Regulations 1990. Regulation 10 (B2), 22 (J3.3a and J3.4), 27 and 28 (P2.6 and P3). The Building Regulations
(Northern Ireland) 2000.
1.
2.

4
PRODUCT CONTENTS LIST 600mm
1800mm
600mm
Greenstore Combi Heat Pump.
Components included in delivery:
Rubber feet
Outdoor sensor T2 (GT2) with cable
Room sensor T5(GT5)
Return sensor T1 (GT1)
4 bar Pressure Relief Valve
Valve with filter
Circlip pliers
Drain plug
Ball valve
Expansion vessel
Filling link with insulation and filter
Unvented cylinder kit:
DHW expansion vessel
Expansion Vessel Hose
Wall mounting kit for expansion vessel
High flow rate inlet control set
Acetal tundish
Literature pack:
User manual
Installation manual
Guarantee card

5
Installation of the heat pump should be performed by a qualified installer.
This chapter includes a section recommending how the heat pump installer
should install, commission and service the heat pump. The installation
manual consists of a plumbing section and an electrical section. These provide
technical data such as measurements, wiring diagrams and installer menus.
Note
It is important that the installer also reads through the User manual. It contains
the information necessary to get a comprehensive understanding of the heat
pump.
Contents:
Important information to the installer
Checklist
What the delivery includes
Dimensions and plumbing connections
The heat pump and collector hose in general
Connecting the heat pump to the heating system
Connecting the heat pump to the power supply
External connections to the heat pump
Commissioning the heat pump
Maintenance
Technical information
For the Installer

6
Important information to the installer
This manual provides all the information necessary to install the heat pump.
The manual is divided into several sections. The order of these is based on the
recommended installation sequence. Use the supplied checklist during installa-
tion.
Before installation remember:
Checklist
Each heat pump installation is unique. However, the following checklist gives a general description of how the installation
should be carried out.
1. Stand the heat pump on a flat surface. Adjust the height using the rubber feet.
2. Ensure that the bore hole (if used) for the collector hose is bored according to applicable regulations (responsibility of
the drilling company). Check that the horizontal collector (if fitted) has been installed correctly.
3. Fit the incoming and outgoing pipes for the heating and heat transfer fluid circuits as well as the expansion tank.
4. Fit the particle filters and valves.
5. Connect any additional circulation pump, if required, to the heating system. Follow the instructions for the pump in
question.
6. Install the outdoor sensor and a room sensor if used.
7. Fill and vent the primary and collector systems before commissioning.
8. Connect the heat pump to the electrical system via an external isolation switch. Use the appropriate wiring diagram.
9. Connect a general alarm and external control if used.
10. Commission the heat pump by making all the necessary settings on the control panel.
11. Check the heat pump after commissioning. Top up the collector system if required.
Warning
The main power supply must be
disconnected before working on the
heat pump.
Important information to the installer / Checklist
Installation of the heat pump should be performed by a qualified installer.
If the heat pump needs to be tilted during transit it may be temporarily tilted with the compressor downwards.
However, never lay the heat pump down or transport it horizontally.
Before the heat pump is commissioned, the heat transfer systems, the hot water cylinder and the heat pump must be
filled and vented.
Check that pipe connections on the collector and primary circuits are intact and have not shaken loose during
transport.
Heat pump installation and collector installation must be carried out in accordance with applicable regulations.
Technical support
For technical support please contact:
Technical Pre & Post sales
Tel: [phone]
Fax: [phone]

7
What the shipment includes
What the delivery includes
The following components are included in the delivery of the heat pump:
Literature pack
User manual
Installation manual
Guarantee card
Circlip pliers
Quantity: 1
Return sensor T1 (GT1)
Quantity: 1
Cable: 4 m
Outdoor sensor T2 (GT2) with cable
Quantity: 1
Rubber feet
Quantity: 4
4 bar pressure relief valve
Quantity: 1
Room sensor T5 (GT5) with cable:
Quantity: 1
Ball valve
Quantity: 1
Expansion vessel
Quantity: 1
Filling link with insulation and filter
Quantity: 1
Drain plug
Quantity: 1
Valve with filter
Quantity: 1
DHW expansion vessel
Quantity: 1
Expansion vessel hose
Quantity: 1
Wall mounting kit for expansion vessel
Quantity: 1
High flow rate inlet control set
Quantity: 1
Acetal tundish
Quantity: 1

8
Dimensions and plumbing connections
The following illustrations show the dimensions of the heat pump and plumbing connections. All measurements are stated
in millimetres.
CH return
CH flow
Mains cold water in
Domestic hot water out
Heat transfer fluid (HTF) in
Heat transfer fluid (HTF) out
Dimensions and connections
1
2
3
4
5
6
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1
Electrical connections
Required installation space
≥100
≥300
1800
≥100
In front of the heat pump a free area of 800 mm is
required for installation and servicing.
Allow a side clearance of at least 100 mm on the sides
and behind the heat pump.

9
The heat pump and collector hose in general
Transporting the heat pump
The heat pump should always be transported and stored in an upright position, never horizontally. Otherwise the suspen-
sion fittings inside the compressor can be damaged. If the heat pump must be tilted during entry to the installation site,
this should be done for as short a time as possible. The outer cover panels should be removed to avoid damage, if the heat
pump is moved without using the supplied pallet.
The heat pump must not be stored at temperatures below -10ºC.
Positioning the heat pump
It is important that the heat pump stands on a flat surface as it contains sensitive parts. The floor must be stable and have a
strength to carry at least 500 kg. Adjust the rubber feet so the heat pump does not lean.
The temperature surrounding the heat pump should be between 0ºC and 35ºC.
The installer should take sound insulation into consideration when positioning the heat pump.
Maximum working temperatures
The heat pump can work at a maximum return water temperature of approximately 57ºC. If the temperature rises above
this value the heat pump will stop for safety reasons.
The electric heater will stop if the temperature rises above 55ºC. The maximum outgoing temperature to the heating
system is around 65°C.
Minimum working temperatures
The heat pump supplied is preset to a minimum temperature of collector fluid -10°C inlet and -10°C outlet. The heat pump
can operate at inlet temperatures down to -5°C, lower inlet temperatures are not recommended.
The preset values can be changed during commissioning.
Fit the filters
The task of the filters is to filter out dirt before it can enter the heat pump.
Fit the filter for the collector circuit on the incoming pipe from the collector.
Fit the filter for the primary circuit on the incoming pipe from the heating system.
Both filters should be fitted as close to the heat pump as possible and placed horizontally. Make sure that the direction of
flow is correct.
The heat pump and collector hose in general

10
Collector hose
The task of the collector hose is to convey the heat transfer fluid through the
ground to gain a few degrees of heat. The hose is a thin-walled plastic hose of
type PEM 40 x 2.4 PN 6.3. SDR11.
Installation and backfilling around the collector hose
Installation of the collector and backfilling the soil around the collector hose
should follow applicable material and working descriptions and regulations.
It is important that the filling material does not contain stones or other sharp
objects that can damage the collector hose.
Use hose pliers, not a saw, when cutting the collector hose. Deburr the end of
the pipe internally and externally. It is important that no dirt or debris enters the
system. Dirt and debris can cause a blockage in the heat pump.
Minimum permitted bending radius
Minimum permitted bend radius is 1 metre. If sharper bends are required an
elbow connector must be used. If the collector hose is damaged by too sharp a
bend, it can be repaired by using a straight coupling.
Maximum length of the collector hose
The maximum length of the collector hose is based on the heat transfer fluid
pressure drop. A heat transfer fluid consisting of bioethanol or glycol and water
is recommended.
Note
The maximum collector hose lengths
for heat pump models are provided in
the table.
In situations where the length of the
collector hose needs to exceed the
permitted value, you can connect the
hoses in parallel.
The heat pump and collector hose in general
Heat pump model
Maximum length of
collector hose with a
single circuit (m)
PEM 40x2.4 PN 6.3.
Collector hose with 2 circuits
in parallel: Maximum length
per circuit (m)
PEM 40x2.4 PN 6.3.
Greenstore 6 600 -
Greenstore 7 500 1000
Greenstore 9 400 800
Greenstore 11 400 800
Hose pliers

11
Outline drawings for the collector hose in the ground and through a wall
Connecting the collector hose to the heat pump
It is important that the collector hose has been leak tested before it is
connected to the heat pump. The hose should be tested to 3-4 bar for a
minimum of 1 hour to ensure there are no leaks. The leak test can be
performed using an air compressor. The collector is usually pressurised
during the laying process.
House wall
Collector hose
Insulation
Example of the collector through the wall
(from the side)
Example of the collector through the wall
(cross section)
Collector in the ground
800-1000 mm
800-1000 mm
Filling of sand or stone free soil
approximately 100 mm around the
collector hose.
Collector, PEM 40 x 2.4 PN 6.3.
200 mm
The heat pump and collector hose in general
Note
Non-combustable pipe material must
be used when routing the pipes
indoors.
The drawings below show how to run the collector hose in the ground and
through a wall. The soil filling around the hose must not contain stones.
Insulation of pipework
All collector pipework should be insulated a minimum of 2 metres from the
property. Pipework should also be insulated where the flow and return are
closer than 800 mm to each other.

12
The collector hose can be connected to the heat pump with one or more circuits. In a multi-circuit system, the collector
pipes are connected in parallel as illustrated below. The parallel pipes are connected to two manifolds. Each coil should
have a shut off valve and a flow control valve. The flow control valve is adjusted so that the flow rate is the same in each
coil. The coils should have the same length.
After the manifolds and the flow control valves, the coils are connected to a collecting pipe. A filling link, filter and the
plastic expansion vessel supplied with the heat pump are connected to the collecting pipe. A pressure relief valve is
connected to the outgoing pipe.
One circuit at a time is filled with heat transfer fluid. Keep the valves closed in the other loops during the process. Read
more about filling under the heading Connecting the heat pump to the heating system.
Expansion vessel
Manifolds
Collector
Multi-circuit system
Heat pump
Expansion vessel Filling link
Collector
Single circuit system
Control valves
The heat pump and collector hose in general
Filling link
Heat pump
Installing the expansion vessel
The plastic expansion vessel for the collector circuit is supplied with the heat pump. It is important to position it at
the highest point in the circuit, preferably above the heat pump. If there is a low ceiling making it impossible to fit the
expansion vessel above the pump, it can be positioned as illustrated in the diagram to the left. It is important to install the
expansion vessel so that any air disperses upwards. Air will remain in the circuit if the expansion vessel is fitted incorrectly
(see the figure to the right).
Wrong
Correct

13
Install the collector as follows:
1. The compact collectors are installed horizontally. The collector should
lean with the connection side at least 30 cm above the bottom to aid the
venting process. Trench measurements: depth: 1 - 1.3 m, width: 2.5 m.
Minimum distance between two rows of compact collectors is 1 m.
Minimum distance between collectors and the house is 3 m. Trench
digging must adhere to applicable regulations.
2. Installation of the collectors can be simplified by joining up to five
collectors on the ground before they are positioned in the trench.
3. Place the collector modules in the trench, joined together using fusion
welded or compression fittings.
4. Pressure test the system with air for 3-4 hours up to 4 bar prior to
filling with heat transfer fluid. Reduce to 2 bar when backfilling.
5. Refill using sand or soil without stones.
6. Route the return line, 40 mm PEM, at a depth of 1 m.
7. Route the collector hoses up to the house wall. Hoses must be
insulated over the final 2 metres towards the house. Non-combustable
pipe material must be used when routing the pipes indoors.
Horizontal installation
The following equipment is used for the collector installation:
Hose welding
equipment
Hose pliers Fusion weld sleeve
Ø40 mm
Pipe coupling
1 inch BSP
Compression connector
Compact collector
The heat pump and collector hose in general
Insulation of pipework
All collector pipework should be insulated a minimum of 2 metres from the
property. Pipework should also be insulated where the flow and return are
closer than 800 mm to each other.
Note
A maximum of 11 compact collectors
can be installed in each row.
Note
Health and safety requirements to
ensure that the sides of the trench
are not liable to collapse must be
observed.

14
Connecting the heat pump to the heating system
Note
Only qualified installers may carry out
the installation. The installer should
observe applicable regulations.
It is important that all previously mentioned preparations have been
carried out before the heat pump is connected to the heating system. Also
ensure the system has been power flushed before it is connected to the
heat pump. Flushing protects the heat pump from contamination.
Oxygen must not enter the system. The heat pump is only intended
to work in oxygen free systems. If oxygen enters the system it causes
corrosion in the heat pump which could block the filter on the heating
system side.
Connecting the heat pump to the heating system
Fitting the unvented kit
Parts to assemble:
The relief valve connections should
not be used for other purpose.
Note
Expansion vessel
Expansion vessel hose
Wall mounting kit for expansion vessel
High flow rate inlet control set
Tundish
Connection:
Mount the expansion vessel with the wall mounting kit. Connect the
expansion vessel hose to the expansion vessel.
Connect the expansion vessel, inlet control set and tundish as shown in the
schematics on page 16-17.

15
Detailed discharge pipe installation requirements
The discharge pipework must be routed in accordance with part G3 of schedule 1 of the building Regulations.
The tundish should be vertical, located in the same space as the unvented hot water cylinder and be as close as possible
and within 500mm of the safety device e.g. the temperature relief valve. The discharge pipe from the tundish should be:
made of metal
at least one pipe size larger than the nominal outlet size of the safety device (larger sizes may be required if the
equivalent hydraulic resistance exceeds that of a straight pipe 9m long - refer to BS6700)
terminate in a safe place where there is no risk to persons in the vicinity of the discharge, and position safely from
electrical devices.
have a vertical section of pipe at least 300mm long below the tundish before any elbows or bends in the pipework
installed with a continuous fall
visible at both the tundish and the final point of discharge or where this is not possible or practically difficult there
should be clear visibility at one or the other of these locations
Connecting the heat pump to the heating system

16
How to drain the hot water cylinder
1. Turn off the main water supply to the cylinder.
2. Open a hot water tap with a position as low as possible in the building,
in order to reduce the pressure.
3. Remove the pipe connection 3 - Mains cold water in and connect
one end of the hose pipe to the connection. Terminate the other end of
the hose to a drain or to outside. Ensure that the drain end of the hose
is at a lower level than the bottom of the cylinder. The greater the fall
on the hose, the higher the flow rate.
4. Disconnect connection 4 - Domestic hot water out.
5. Start the siphon effect by pumping or sucking at the drain end of the
hose.
6. Let the whole volume drain out.
596
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Elanslutningar
506
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470
517
280,5
494 554
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5
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1
Valve outlet size Size of discharge
pipework D1
Size of discharge
pipework D2
Maximum length of
straight pipe
(no bends or elbows)
Deduct the figure below from the
maximum length for each bend or
elbow in the discharge pipe
22 mm Up to 9 m 0.8 m
G1/2 15 mm 28 mm Up to 18 m 1.0 m
35 mm Up to 27 m 1.4 m
28 mm Up to 9 m 1.0 m
<G3>/4 22 mm 35 mm Up to 18 m 1.4 m
42 mm Up to 27 m 1.7 m
35 mm Up to 9 m 1.4 m
G1 28 mm 42 mm Up to 18 m 1.7 m
54 mm Up to 27 m 2.3 m
How to flush the system & tank
To flush the tank use the above proposed setup, add a hose onto the hot
water outlet position number 4 (in the above diagram) and then flush the
hot water tank.
>0cm
Connecting the heat pump to the heating system

17
Connecting the heat pump to the heating system
Connecting to the heating system without a bypass:
The heat pump can be connected to the heating system without a bypass, as the circulation in the heat pump and the
heating system is managed by the integrated pump G2 (P2). However minimum flow of at least 70% of the nominal flow
(see the table below) must be maintained throughout the year. Thermostatic radiator valves should be fully open and
underfloor heating systems should have at least half of the coils fully open at all times. The control unit gives an alarm
when the return differential temperature exceeds 13ºC.
If the heating system is designed so that at least 70% of the nominal flow cannot be guaranteed, the heat
pump should be connected using a bypass and an external main pump G1 (P1).
Hot water function:
Hot water production is started by the hot water sensor T3 (GT3), and is stopped by the return sensor T9 (GT9).
Heating system pump
The circulation pump G2 (P2) is a Wilo Star 25/6-130.
Maximum system pressure drop in the
heating system
The maximum system pressure drop and the minimum flow that
the integrated circulation pump can operate with is presented
in the table. If the minimum flow cannot be guaranteed a
bypass and an external main pump G1 (P1) should be
installed. Ensure that TRV’s cannot close down and restrict the
required flow.
Pressure height (H)
Flow (Q)
Heat pump model Nominal flow [*] Minimum flow [*] Max system pressure drop [**]
Greenstore 6 0.20 l/s 0.14 l/s 36.0 kPa
Greenstore 7 0.25 l/s 0.18 l/s 36.0 kPa
Greenstore 9 0.31 l/s 0.22 l/s 34.0 kPa
Greenstore 11 0.38 l/s 0.26 l/s 32.0 kPa
Use in hard water areas
Normally there is no need for water treatment to prevent scale formation.
In areas where temporary water hardness exceeds 200ppm, consideration may need to be given to the fitting of a scale
prevention device. In such circumstances the advice of the local water authority should be sought.
[*] litres/second
[**] kiloPascal

18
Connect heat pump Combi model to the heating system
The built-in control unit controls the heat pump using the outdoor sensor T2 (GT2) and the return sensor T1 (GT1)
according to the outdoor compensated control curve. In the unlikely event the heat pump compressor is unable to meet
the heating requirements, the electric heater starts automatically and together with the heat pump provides the required
temperature. Hot water production is given priority over central heating. Hot water production is controlled by the sensor
T3 (GT3), which is located in the hot water cylinder. When the water in the cylinder reaches the required temperature,
heat is once more supplied to the heating system.
The control unit can also operate a second curve together with a mixing valve. The mixing valve curve must be set lower
than the heat curve for the rest of the heating system. This extra function is used, for example, in a heating system that is a
combination of radiators (higher temperature demand) and underfloor heating (lower temperature demand).
Connecting the sensors: Return sensor T1 (GT1) and Outdoor sensor T2 (GT2) must always be connected. Sensor T4
(GT4) is only connected if a mixing valve curve is used. The sensor T5 (GT5) is connected when the heat pump is to be
influenced by a room sensor. A room sensor is supplied as standard with the heat pump.
An absolute prerequisite for this type of connection is that at least 70% of the nominal flow can be maintained throughout
the year. Thermostatic valves must remain fully open in order to ensure this.
* If a bypass and external circulation pump is added, the flow over the heating system can be reduced down to 40% of the
nominal flow for the heat pump. This means that at least 30% of the thermostatic valves must be fully open. If none of the
above is possible, a 100 litre primary water storage tank should be fitted.
The length of the bypass should be at least 10 times the inner diameter of the pipe.
Symbols according to ISO/FDIS 14617.
Letter codes according to IEC 61346-2.
This is a principal drawing.
E10 Central heating system
C11: Expansion vessel
G1 (P1): Radiator pump
Q12: Isolating valve
E20 Heating system
E21: Heat pump
E22: Electric water heater
F21: Safety valve
G2 (P2): Heating system pump
Q21: Diverter valve
V21: Filter heating system
E30 Heat transfer fluid
F31: Safety valve
G3 (P3): Heat transfer fluid pump
Q32: Isolating valve
Q35: Air vent (manual)
V31: Filter heat transfer fluid in
E40 Mixed heating system
G4 (P4): Pump for mixed heating system
Q41: Mixing valve
Q42: Isolating valve
E60 Domestic hot water system
V60: Hot water draw-off
W60: Cold water cylinder inlet
C61: Expansion vessel *
F61: Pressure relief valve
F62: Temperature and pressure relief valve
Q62: Isolating valve
Q63: Pressure reducing valve
Q64: Non return valve
Q65: Tundish
T1 Central heating water
T2 Outdoor
T3 Domestic hot water
T4 Mixed heating system
T5 Room
T6 Compressor
T8 Primary flow
T9 Primary return
T10 Heat transfer fluid (coll) in
T11 Heat transfer fluid (coll) out
* Mixed heating system
There is a possibility to control a
second heating system with a mixing
valve. This is recommended when a
combination of radiators and a floor
heating system is used.
* Expansion vessel
No valve should be fitted between
the expansion valve and the storage
cylinder.
Connecting the heat pump to the heating system

19
Connecting the heat pump to the heating system
Individual temperature control in each room and increasing volume of
internal water
This solution is used to control the temperature of each room, for example, where thermostatic valves are used on the
radiators in each room. The function of the heat pump is to maintain a temperature in accordance with the heat curve
(depending on outdoor temperature) in the 100 litre primary water storage tank. The water is then distributed from the
store to the heating system. This solution also allows the overall volume of the installation to be increased if the volume of
the heating system is inadequate, for example with one or two fan-assisted radiators.
This system design is intended to ensure that the heat pump is able to continue operating if the flow falls below 70% of the
nominal system flow.
* Mixed heating system
There is a possibility to control a
second heating system with a mixing
valve. This is recommended when a
combination of radiators and a floor
heating system is used.
E10 Central heating system
C11: Expansion vessel
G1 (P1): Radiator pump
Q12: Isolating valve
E20 Heating system
E21: Heat pump
E22: Electric water heater
F21: Safety valve
G2 (P2): Heating system pump
Q21: Diverter valve
V21: Filter heating system
E30 Heat transfer fluid
F31: Safety valve
G3 (P3): Heat transfer fluid pump
Q32: Isolating valve
Q35: Air vent (manual)
V31: Filter heat transfer fluid in
E40 Mixed heating system
G4 (P4): Pump for mixed heating system
Q41: Mixing valve
Q42: Isolating valve
E60 Domestic hot water system
V60: Hot water draw-off
W60: Cold water cylinder inlet
C61: Expansion vessel *
F61: Pressure relief valve
F62: Temperature and pressure relief valve
Q62: Isolating valve
Q63: Pressure reducing valve
Q64: Non return valve
Q65: Tundish
T1 Central heating water
T2 Outdoor
T3 Domestic hot water
T4 Mixed heating system
T5 Room
T6 Compressor
T8 Primary flow
T9 Primary return
T10 Heat transfer fluid (coll) in
T11 Heat transfer fluid (coll) out
* Expansion vessel
No valve should be fitted between
the expansion valve and the
storage cylinder.

20
Filling the heating system
1. Open and close the filling loop between the cold water system and the
heating system in short time intervals whilst observing the pressure
guage.
2. Vent the system and refill to the correct pressure.
Filling the collector circuit
The collector circuit is filled with heat transfer fluid to be able to collect
energy from the ground. A heat transfer fluid consisting of bioethanol or
glycol and water is recommended. The freezing point should be approxi-
mately -15°C.
Fill the collector circuit
1. Connect the two hoses from the filling pump to the filling link as shown
in Diagram 1.
Diagram 1: Filling equipment
Expansion vessel
Filling link
Filling
pump
Refilling / de-airing valve
Note
Care should be taken when filling the
system, not to get any water on the
electrical components. Keep the side
panels on the heat pump when filling
the system.
Heat pump
Collector circuit
Connecting the heat pump to the heating system