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Worcester Greenstore 6kW, Instruction Manual, Page: 34 / 36

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Worcester Greenstore 6kW Instruction Manual Download Page 34

34

The heat pump and collector hose in general

39

The collector hose can be connected to the heat pump with one or more circuits. In a multi-circuit solution, the collector

hoses are connected in parallel as illustrated below. The parallel hoses are connected to two manifolds. Each coil should

have a shut off valve and a control valve. The control valve is adjusted so that the flow rate is the same in the coils.

After the distributor and the valves, the coils are connected to a collecting pipe. A filling unit, filter and an expansion vessel

are connected to the collecting pipe. A safety 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 headings Connecting the heat pump to the heating system /Filling water in the heating system

and Filling the heat transfer fluid in the collector hose.

Connecting the heat pump to the heating system

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

pipe 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 with ‘dead water’. When oxygen enters the system it

causes corrosion in the heat pump and blocks the filter on the heating system

side.

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). This also means the main pump G1 (P1) is omitted where a bypass is

fitted. A minimum flow of at least 70% of the nominal flow (see the table below) can be maintained throughout the year.

Radiator thermostat valves should be fully open and underfloor heating systems should have at least half of the coils to be

fully open. The control unit gives an alarm when the temperature increase exceeds 13ºC in the heating system. If the

heating system is designed so that a minimum 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 charging is started by the hot water sensor T3 (GT3), and is stopped by the return sensor T9 (GT9).

Heat carrier pump

The circulation pump G2 (P2) is a Wilo Star 25/6-130 on heat pumps from 6kW to 9kW.

Only qualified installers may carry out

the installation. The installer should

observe applicable regulations and

recommendations from the supplier.

  Connecting the heat pump to the heating system

Note

TECHNICAL INFORMA

TION

FOR THE USER

FOR THE INST

ALLER

TECHNICAL INFORMA

TION

FOR THE USER

FOR THE INST

ALLER

Expansion

vessel

Filling Unit

Collector

Heat pump

G3

(P3)

Expansion

vessel

Filling Unit

Collector

Heat pump

G3

(P3)

Manifolds

Control

valves

Single circuit solution

Multi-circuit solution

Summary of Contents for Greenstore 6kW

Page 1: ...COMMISSIONING SERVICING GB IE Worcester Bosch Group Cotswold Way Warndon Worcester WR4 9SW Worcester Bosch Group is a trading name of BBT Thermotechnology UK Ltd www worcester bosch co uk INSTRUCTION MANUAL INSTALLATION COMMISSIONING SERVICING Part Number 8 716 112 315 Issue a GB IE ...

Page 2: ...ty the product must not be modified without the manufacturer s permission If this occurs this documented EU declaration ceases to apply and the product s owner is considered to be the manufacturer and must verify and draw up an addendum to the EU declaration and file technical data for the inspection authority The product is CE marked 2006 05 19 Johnny Wärnelöv MD IVT Industrier AB Sweden BUILDING...

Page 3: ...Setting the room temperature 13 Set the heating 14 16 Set the required room temperature 17 Set the heat pump for extra hot water 17 Heating and hot water settings 18 Read the temperatures on the heat pump 18 19 Extra functions Customer level 2 20 Menu outline for Extra functions Customer level 2 20 Temperature settings 21 Set extra heat curve with mixing valve 22 Hot water settings 23 Timer contro...

Page 4: ...bypass 42 Increasing volume of internal water without bypass 43 Filling the heating system 44 Filling the heat transfer fluid in the collector hose 44 Connecting the heat pump to the power supply 47 Installation of sensors 47 External connections to the heat pump 48 Connecting the general alarm external input and load monitor 49 Installer and service menu I S 50 How to use the control panel 50 Com...

Page 5: ... 22 Nominal flow heating side l s 0 20 0 25 0 31 Maximum pressure available heating side at nominal flow kPa 36 36 34 Nominal flow of antifreeze mixture to the collector hose l s 0 30 0 38 0 46 Maximum pressure available to collector hose at nominal flow kPa 49 45 44 Type of antifreeze Bioethanol water or Propylene ethylene glycol Water Freeze protection temperature C 15 Maximum pressure heating s...

Page 6: ...he heat pump has been manufactured for easy and reliable use as well as to provide your house with inexpensive and environment friendly heating The easiest way to describe how a heat pump works is to say it works like a refrigerator but in reverse In a refrigerator heat is moved from the inside to the outside In a heat pump heat stored in the ground rock or water is moved into the house The heat p...

Page 7: ...g and domestic hot water systems The vapour is cooled in the condenser and becomes fluid The pressure in the refrigerant is still high when it reaches the expansion valve The refrigerant pressure is lowered in the expansion valve At the same time the temperature also drops to approximately 10ºC When the refrigerant passes the valve and the evaporator it changes to vapour again There is a valve to ...

Page 8: ...evaporator evaporates the refrigerant to gas and transfers heat from the heat transfer fluid to the refrigerant circuit Heat transfer fluid pump The pump is insulated and features an anti corrosive finish It ensures the heat transfer fluid circulates from e g the energy source to the heat pump Expansion valve Lowers the pressure of the refrigerant that enters the evaporator Sight glass Sight glass...

Page 9: ...way Read more about the sensors under heading Read the temperatures on the heat pump Possible cause 1 Temporary error Action 1 Monitor performance of product Possible cause 2 Short circuit or broken sensor cable Action 1 If you have a multimeter you can disconnect the sensor and check the cable s resistance Compare with the sensor table in the section Technical information Possible cause 3 Defecti...

Page 10: ...urn water from the radiators becomes too high The limit is at approximately 57ºC Possible cause 1 The temperature setting is too high Action 1 Lower the temperature setting Heat Possible cause 2 The valves on the radiators or underfloor heating system are closed Action 1 Open all valves 2 Press the Ackn button Possible cause 3 The hot water temperature is set too high Action 1 An alarm is given ac...

Page 11: ...aker is reset when you hear a clicking sound 3 Check that the filter on the primary circuit is clean Power switch ON OFF Indicator on Mains power ON Indicator flashes Mains power OFF Operating status Indicator on The heat pump compressor is operational Electric heater status Indicator on The heat pump is using additional heat from the electric heater Hot water status Indicator on The heat pump is ...

Page 12: ...n Basic functions Customer level 1 Compressor temperature T6 GT6 Possible cause 1 The working temperature of the compressor is too high Action 1 Press the Ackn button 2 Contact the Technical Department at repeated alarms Possible cause 2 Intermittent temperature rise due to abnormal operating conditions Action 1 Press the Ackn button 2 Monitor to see if fault clears Low pressure switch LP Possible...

Page 13: ...ial menu The following windows are displayed The reset switch for the compressor can be found under heading Fuses and resetting buttons on the heat pump The menu display shows The alarm indication goes out when acknowledging the alarm even if the fault has not been rectified The menu display shows Basic functions Customer level 1 Note Note Note TECHNICAL INFORMATION FOR THE USER FOR THE INSTALLER ...

Page 14: ... wall outdoors Curve slope The curve slope can be changed to increase or decrease the heating in the house The scale is between 0 10 All alarms There are many reasons why the alarm occurs However there is never a risk involved in resetting an alarm All the alarms that can appear in the menu display are described on the following pages The descriptions give an idea about the nature of the alarm and...

Page 15: ...ed Possible cause 1 Power failure in the house consumer unit Action 1 Check the fuses in the house consumer unit 2 If a miniature circuit breaker has tripped reset the circuit breaker Change the fuse if necessary 3 The heat pump automatically returns to its operating mode 15 minutes after the fault has been rectified Possible cause 2 The heat pump s miniature circuit breaker has tripped Action 1 R...

Page 16: ...ge Sight glass Bubbles may be seen for a few minutes during the initial start up of the appliance If bubbles are there continuously contact the installer If the sight glass indicates green this means there is no moisture in the system If it is yellow there is moisture in the system If this happens contact the installer Filter The task of a filter is to ensure no debris enters the heat exchangers O...

Page 17: ...he domestic hot water DHW Important points to check after start up In the first period after commissioning particular attention should be paid to the pressure and levels in the heat distribution and heat transfer fluid circuits After a short period of operation it may be necessary to top up the heat transfer fluid On delivery the motor cut out setting is determined by a value produced during hot w...

Page 18: ...e hysteresis set in the display P1 4 Set how many days you want the heating phase to last Set how many days you want the floor heating system to maintain the maximum drying temperature Set how many days you want the cooling phase to last Set the start and stop temperatures for the drying program Set the maximum temperature that the drying program should work at The function is activated and deacti...

Page 19: ...the hot water heater The temperature is approximately 5ºC lower than the temperature of the hot water inside the inner container This menu only applies together with a flow sensor If an extra curve with mixing valve is used for example for an underfloor heating system you can see the temperature on the flow water in the circuit The temperature varies with the outdoor temperature The menu is only a...

Page 20: ...eficial and commonly used However there are numerous extra functions that can be used to control the heat pump This can for example include activating the heat pump s holiday function or setting the time and date If no settings are made on Customer level 2 K2 the menu display will automatically return to Customer level 1 K1 after 30 minutes Proceed as follows to access the extra functions on Custo...

Page 21: ...rom factory preset to minimum temperature of heat transfer fluid collector 0 C inlet and 2 C outlet If anti freeze liquid with a freezing point of 15 C is used the heat pump can operate at outdoor temperatures down to 5 C The preset values must be changed during commissioning The settings in menus 9 4 and 9 5 must be changed to 7 C and 10 C respectively Hot water settings Set the temperature in th...

Page 22: ...id having to wait for the heat pump restart timer go to the menu Fast restart of heat pump menu 5 6 and quickly restart the heat pump If the heat pump does not start press the Info button to see if a heating demand exists 4 Check the sight glass inside the heat pump during start up Bubbles may appear in the sight glass for a few minutes during start up The bubbles should then stop Bubbles present ...

Page 23: ...lly returns to Customer level 1 The Installer level also includes Customer levels 1 and 2 How to use the control panel The following example shows how to use the control panel The example shows how you move to menu display 5 13 and confirm the external sensors More information about the control panel is found under the heading Control Panel in the User section 1 Press the menu button for approxima...

Page 24: ...onnected according to the diagram opposite The contact for the general alarm output carries no current and it closes at a general alarm Connect max 24 V and 100 mA on the contact External input The heat pump includes prepared functions to permit the heating to be controlled externally for example from a telephone The input to the heat pump can be programmed for different functions on the control u...

Page 25: ...eat pump Power supply 1 phase The power supply is connected to terminals L N and Earth Mixing valve on the heating circuit If a second heat curve with a mixing valve is to be used the mixing valve is connected to terminal block SV1 External main pump in the heating system G1 P1 The external main pump must be connected to the terminal block if a bypass is required The pump is connected to terminal ...

Page 26: ...o avoid interference on the sensors Wiring diagram is supplied with the heat pump A description of external connections is given in this section Examples of external connections include room and outdoor sensors and mixing valves The mains connection as well as the material used to make this connection must comply with current electrical regulations The heat pump electrical supply must be protected...

Page 27: ...t Pump Maintenance Technical information Table 1 Mixing ratio in litres metre For the Installer It is important that the installer reads through the For the User section of the manual The information necessary to get a comprehensive understanding of the heat pump is found here Example A 200 metre length of hose type 40 35 with anti freeze gives 200 x 0 29 litres anti freeze metre 58 litres of anti...

Page 28: ...zontal 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 filters and valves 5 Make the connections for any external additional heat sources 6 Connect any additional pump if required to the heating system Follow the instructions for the pump in question 7 Install the outdoor...

Page 29: ...2 Place the hose and submersible pump in a barrel that holds 100 litres Eye protection and gloves should be worn during filling of the system and handling of antifreeze 3 Fill the barrel with heat transfer fluid The relation between water and heat transfer fluid can be found in the tables 1 and 2 Pour water into the container before anti freeze liquid Before starting up the pump mix the anti freez...

Page 30: ...ctions All measurements are stated in millimetres Increasing volume of internal water without bypass This solution increases the overall volume of the installation if the volume of the heating system is inadequate for example with one or two fan assisted radiators Connecting the heat pump to the heating system 1520 TECHNICAL INFORMATION FOR THE USER FOR THE INSTALLER TECHNICAL INFORMATION FOR THE ...

Page 31: ...n operate at outdoor temperatures down to 5 C The preset values must be changed during commissioning At this level the COP is depending on model appr 3 3 3 5 at 35 C collector fluid out and 2 4 2 6 at 50 C collector fluid out Fit the filter The task of the filter is to filter out dirt before it can enter the heat pump The supplied filters should always be fitted on the incoming pipes on both the p...

Page 32: ...efore be used instead of other heat transfer fluids Connect the Greenstore heat pump 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 When the heat pump is unable to meet the heating requirements the electric heater starts automatically and together with the heat pu...

Page 33: ...lector hose has been pressure tested before it is connected to the heat pump The hose should be pressure tested to 3 4 bar for a minimum of 1 hour or 6 hours for Compact collectors to ensure there are no leaks A ground collector is usually pressurised during the laying process Pressure test with air up to 4 bar Reduce to 2 bar when refilling A further leakage test must be performed on the collecto...

Page 34: ...tem it causes corrosion in the heat pump and blocks the filter on the heating system side 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 This also means the main pump G1 P1 is omitted where a bypass is fitted A minimum flow of a...

Page 35: ...mber of collector modules The space between the collector modules should be about 20 cm but may be extended if needed The pipes on the collector modules are cut to a suitable length A trench width of at least 3 metres is required if collectors are placed at both sides of the trench The collector modules can also be installed horizontally The collector should then lean with the connection side at l...

Page 36: ...top of the HTF pump Heat transfer fluid out is connected to the bottom of the heat exchanger figure 2 Note The sensor fitted to heat transfer fluid out must be dismantled first figure 2 3 Remove the Armaflex insulation from the heat transfer fluid pipes so they are completely exposed figure 3 4 Cut the heat transfer fluid pipes so they are suitable for right hand side installation figures 4 and 5 ...

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