Contents Contents Calling up Live Monitor (checking status codes) ..............25 Calling up the installer level ......... 25 Safety ..............4 Heating mode flow temperature control....25 Action-related warnings ......... 4 Calling up statistics ..........25 General safety information ........4 Checking that the product works correctly...
1 Safety – Repair Safety – Decommissioning Action-related warnings ▶ Observe all instructions that are included Classification of action-related warnings with the product. The action-related warnings are classified in ▶ Proceed in accordance with current tech- accordance with the severity of the possible nology.
Page 5
Safety 1 ▶ Do not use the products' free terminals as ▶ Do not inhale any steam or gases that supporting terminals for other wiring. escape from the refrigerant circuit as a result of leaks. ▶ At lengths of over 10 m, 230 V connection ▶...
1 Safety The heat pump itself does not have a frost 1.2.17 Risk of material damage caused by using an unsuitable tool protection function. For smooth operation of the refrigeration circuit, a minimum room ▶ Use the correct tool to tighten or loosen temperature of 7 °C must be maintained.
Safety 1 ults in the product being switched off by the internal control and safety devices. Intended use includes the following: – observance of accompanying operating, installation and maintenance instructions for the product and any other system com- ponents – installing and fitting the product in accord- ance with the product and system approval –...
2 Notes on the documentation Notes on the documentation The outlet temperature of the heat source is constantly measured. If the outlet temperature of the heat source falls below a certain value, the compressor temporarily switches Observing other applicable documents off and displays a status message.
Product description 3 Design and functionality of the product 3.2.1 Design Condenser Brine circuit pressure sensor Compressor outlet Brine mixer temperature sensor Rotary piston com- Brine pump Removable hood Plate with serial number pressor on the rear Refrigerant collector Front casing High-pressure pressure Front flap Low-pressure sensor...
3 Product description 3.2.2 Functionality Information on the data Meaning plate 3.2.2.1 Heat pump Heating output at a brine tem- B0/W35 perature of 0 °C and heating flow temperature of 35 °C Heating output at a brine tem- B0/W55 perature of °C and heating flow temperature of 55 °C Volt Mains voltage...
Set-up 4 Benchmark Selecting the installation site ▶ Select a dry room that is frost-proof throughout and Applicability: Great Britain where the environmental temperature does not fall below 7 °C and does not exceed a maximum of 40 °C. Vaillant is a licensed member of the Benchmark Scheme. ▶...
Page 12
4 Set-up Always transport the product as illustrated above. Never transport the product as illustrated above. Installation and maintenance instructions geoTHERM 0020250181_00...
4 Set-up Minimum clearances Wall-mounting the product Danger! Risk of accidents as a result of insuffi- cient load-bearing capacity of the fixing means. If the fixing elements or wall do not have suf- ficient load-bearing capacity, the product may come loose and fall down. Brine fluid may leak from damaged lines.
Hydraulics installation 5 Removing the front casing 4.11 Removing the transport locks Remove the front casing as shown in the illustration. (→ Page 15) Remove the side casing. (→ Page 15) Remove the left- and right-hand transport locks (foam pieces): –...
5 Hydraulics installation Requirements for the heating circuit Install the expansion relief valve hose in a frost-free environment and ensure that its routing ends in an open In heating installations that are equipped primarily with ther- hopper where it is then visible. mostatic or electrically controlled valves, a constant and suf- Connect the heating flow to the heating flow connection ficient flow through the heat pump must be ensured.
Hydraulics installation 5 – Diameter of the tundish/discharge pipe: ≥ 32 mm Applicability: Great Britain (≥ 1.26 in) Install the tundish in such a way that no cables or other Total Water hardness at specific system volume heating electrical components can be damaged if there is a >...
5 Hydraulics installation 5.6.2 Filling/refilling the heating installation Expansion vessel From the heat pump to the heat source (cold From the heat source Open all of the thermostatic valves on the heating in- brine) to the heat pump (hot stallation and, if required, all other isolation valves. brine) Check all of the connections and the entire heating in- Install a dirt filter (33) in the pressure line.
Electrical installation 6 ▶ – Strip the cable ends to a maximum of Brine circuit operating pressure: 0.15 MPa (1.50 bar) 10 mm. ▶ Build up the pressure in the brine circuit by using the Take care to wire up correctly. filling pump to top up the brine fluid by opening the isol- ation valve (61).
Page 20
6 Electrical installation Hinge up the cover. Note the components and accessories in the relevant system instructions (→ Page 51) that you have to con- nect in the electronics box. Installation and maintenance instructions geoTHERM 0020250181_00...
Electrical installation 6 Connecting controls and accessories to the 13. Lay the lines correctly. electronics 14. Use the strain reliefs to secure the cable in the elec- tronics box. Danger! 15. Close the electronics box. (→ Page 23) Risk of death from live connections! Closing the electronics box There is a risk of death from electric shock when working in the heat generator's elec-...
7 Start-up 6.8.3 Attaching the front casing to the heat pump Starting up the heat pump ▶ Place the front casing on the upper brackets. Plug the mains plug into an earthed plug socket. Push the front casing onto the heat pump until the re- ◁...
Adapting the unit to the heating installation 8 Calling up Live Monitor (checking status Calling up statistics codes) Menu → Installer level → Test menu → Statistics Menu → Live Monitor – You can use this function to call up the statistics for the –...
8 Adapting the unit to the heating installation tuation affects the remaining feed heads at nominal volume Parameter Explanation flows for a heat source temperature spread of 3 K. Freeze Minimum outlet temperature from the heat pump protection into the environment circuit at which operation [ mbar ] is stopped in order to prevent the brine from freezing.
Inspection and maintenance 9 ▶ Handing the product over to the end user Always switch off all power supply lines for the heat pump and all components ▶ Explain to the end user how the safety devices work and involved before carrying out any electrical where they are located.
10 Troubleshooting Check that the heat pump system is working without Note any problems. If a fault message is present, the product re- mains in comfort protection mode after it is reset. After the product is reset, the fault mes- 10 Troubleshooting sage is displayed first before the message Limp home mode (comfort protection) ap-...
Replacing components 11 Menu → Installer level → Start inst. assistant Ensure that water does not drip on live components (e.g. the electronics box). 10.1.6 Using check programmes Use only new seals and O-rings. Menu → Installer level → Test menu → Check pro- 11.1.2 Completing the replacement work grammes Attach the casing.
12 Decommissioning 12 Decommissioning 11.1.3.2 Replacing the PCB and the display at the same time 12.1 Temporary decommissioning Language 12.1.1 Protecting the heat pump against frost 01 English ▶ Observe the requirements for the installation site of the heat pump (→ Page 11). 12.2 Permanently decommissioning 12.2.1 Recycling and disposal...
Customer service 13 ▶ Refrigerant must only be disposed of by a qualified com- petent person. 13 Customer service 0020250181_00 geoTHERM Installation and maintenance instructions...
Appendix Appendix Heat pump schematic Sensors & Switches: - 8 x T - 4 x P sensor - 1 x P switch - 1 x V flow rate sensor A10 (230 V) A12 (230 V) & A11 (PWM) & A13 (PWM) Mesh filter Mesh filter Compressor...
Page 33
Appendix Setting level Values Unit Increment, select Default setting Setting Min. Max. Environm. pump starts Current value Cooling mixer steps Current value EEV steps Current value VUV DHW switchings Current value Installer level → Test menu → Check programmes → P.01 Heating mode Select P.02 Cooling mode...
Page 34
Appendix Setting level Values Unit Increment, select Default setting Setting Min. Max. T.147 DCF status No DCF signal Validate DCF signal Valid DCF signal Installer level → Configuration → Language Current language 01 Deutsch 02 English 02 English 03 Français 06 Nederlands 16 Norsk 18 Čeština...
Appendix Setting level Values Unit Increment, select Default setting Setting Min. Max. End the installation assistant? Yes, back Can only work in conjunction with the VWZ ZK accessory. Fault lists (section 9.1) are only available, and can only be deleted, if faults have occurred. Maintenance messages Remedy Code...
Appendix Code Meaning Environment circuit S.242 Environment circuit: Outlet temperature too low S.246 Environment circuit: Pressure too low S.247 Env. circuit: Fault contact: Pump open Building circuit S.272 Building circuit: Remaining feed heads limit active S.273 Building circuit: Flow temperature too low S.274 Building circuit: Pressure too low S.275 Building circuit: Flow rate too low S.276 Building cir.: Lockout contact S20 opened...
Page 37
Appendix Remedy Code Meaning Cause – – F.546 Sensor fault: High pressure Sensor not connected or sensor in- Check and, if required, replace put has short-circuited the sensor (see sensor charac- teristic values in the appendix) – Replace the cable harness –...
Page 38
Appendix Remedy Code Meaning Cause – – F.723 Building circuit: Pressure too low Pressure drop in the building circuit Check the building circuit for due to leakages or air pockets leaks – – Building circuit pressure sensor de- Top up with water, purge fective –...
Appendix Remedy Code Meaning Cause – – F.735 Evaporation temperature too high Temperature in the environment cir- Reduce or stop the external heat cuit (heating mode) or building cir- that is entering cuit (cooling mode) too high for com- – Check the de-icer (does it heat pressor operation up even though it is "Off"...
Appendix Technical data Technical data – General VWS 36/4.1 230V Flow/return heating connections, boiler side 22 mm diameter Boiler-side flow/return heat source connections 22 mm diameter Product dimensions, width 440 mm Product dimensions, height 720 mm Product dimensions, depth 435 mm Weight without packaging 59 kg Weight with packaging...
Page 43
Appendix Technical data – Heating circuit VWS 36/4.1 230V Minimum operating pressure 0.05 MPa (0.50 bar) Maximum operating pressure 0.3 MPa (3.0 bar) 20 ℃ Min. heating mode flow temperature 60 ℃ Max. heating mode flow temperature 16 ℃ Min. cooling mode flow temperature Heating circuit water contents in the heat pump 3.5 l Nominal volume flow at B0 ΔT 3 K / W35 ΔT 5 K...
Appendix Safety group – drinking water connection Filling/draining cock Heating diaphragm expansion vessel Tamper-proof capped valve Diaphragm expansion vessel – potable water System control Single-room temperature control valve (thermo- Limit thermostat static/motorised) Outdoor temperature sensor Bypass valve Basic hydraulic diagram 0020235577 Heating/domestic hot water back-up boiler Bypass valve Heat pump...
Appendix Basic hydraulic diagram 0020235580 Heating/domestic hot water back-up boiler Domestic hot water generation prioritising diverter valve Heat pump Filling/draining cock Circulation pump Tamper-proof capped valve Monovalent domestic hot water cylinder Non-return valve Potable water expansion relief valve System control Safety group –...
Appendix Basic hydraulic diagram 0020235626 Heat generator Tamper-proof capped valve Heat pump 3-port mixing valve Circulation pump Non-return valve Heating pump Line strainer with magnetite separator Monovalent domestic hot water cylinder System control Decoupler module Remote control unit Potable water expansion relief valve Expansion/wiring centre Safety group –...
Appendix Wiring diagrams Wiring diagram 0020232108 Heat pump System control Circulation pump Limit thermostat Combi cylinder (tank in tank) Outdoor temperature sensor 0020250181_00 geoTHERM Installation and maintenance instructions...
Page 52
Appendix Wiring diagram 0020235577 Heating/domestic hot water back-up boiler Limit thermostat Heat pump Outdoor temperature sensor Circulation pump Cylinder temperature sensor System control Installation and maintenance instructions geoTHERM 0020250181_00...
Page 53
Appendix Wiring diagram 0020235580 Heating/domestic hot water back-up boiler System control Heat pump Remote heat pump expansion module Circulation pump Outdoor temperature sensor Domestic hot water generation prioritising diverter Cylinder temperature sensor valve 0020250181_00 geoTHERM Installation and maintenance instructions...
Page 54
Appendix Wiring diagram 0020249867 Heat pump System control Circulation pump Remote heat pump expansion module Domestic hot water generation prioritising diverter Outdoor temperature sensor valve Cylinder temperature sensor Installation and maintenance instructions geoTHERM 0020250181_00...
Page 55
Appendix Wiring diagram 0020185684 Heat generator eBUS bus coupler Heat pump Limit thermostat Circulation pump Outdoor temperature sensor System control Cylinder temperature sensor 0020250181_00 geoTHERM Installation and maintenance instructions...
Page 56
Appendix Wiring diagram 0020180635 Heat generator System control Heat pump Expansion/wiring centre Circulation pump eBUS bus coupler Monovalent domestic hot water cylinder Limit thermostat 2-zone module Outdoor temperature sensor Zone valve Flow temperature sensor/swimming pool sensor 3-port mixing valve Installation and maintenance instructions geoTHERM 0020250181_00...
Page 57
Appendix Wiring diagram 0020235626 Heat generator Expansion/wiring centre Heat pump eBUS bus coupler Circulation pump Outdoor temperature sensor Heating pump Cylinder temperature sensor 3-port mixing valve Flow temperature sensor/swimming pool sensor System control SysFlow System temperature sensor Remote control unit 0020250181_00 geoTHERM Installation and maintenance instructions...
Page 59
Appendix GROUND SOURCE HEAT PUMP COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the heat pump and associated equipment as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference.
Page 60
Appendix SERVICE RECORD It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed. Service Provider Before completing the appropriate Service Interval Record below, please ensure you have carried out the service as described in the manufacturer’s SERVICE 01 SERVICE 02 Date:...
Need help?
Do you have a question about the geoTHERM VWS 36/4.1 and is the answer not in the manual?
Questions and answers