▶ If room temperature modulation is activ- – Installation ated, be aware that, in the room where the control is mounted, all the radiator valves – Start-up must be fully open. – Inspection and maintenance Installation and maintenance instructions geoTHERM 0020250180_00...
Page 5
▶ If refrigerant escapes, do not touch any Frost protection and monitoring devices are components of the product. only active while the product is connected to the power supply. The product must be connected to the power supply. 0020250180_00 geoTHERM Installation and maintenance instructions...
▶ Ensure that the installation surface has ively for domestic use as a heat generator for sufficient load-bearing capacity to bear the closed central heating installations. Operating operating weight of the product. the product outside the operating limits res- Installation and maintenance instructions geoTHERM 0020250180_00...
Any direct commercial or industrial use is also deemed to be improper. Caution. Improper use of any kind is prohibited. Regulations (directives, laws, standards) ▶ Observe the national regulations, stand- ards, guidelines and laws. 0020250180_00 geoTHERM Installation and maintenance instructions...
Minimum brine fluid pressure: ≥ 0.05 MPa (≥ 0.50 bar) – Brine fluid operating pressure: ≥ 0.07 MPa (≥ 0.70 bar) 3.1.4 Freeze protection This function prevents the evaporator from freezing when the heat source temperature drops below a certain value. Installation and maintenance instructions geoTHERM 0020250180_00...
Cable feedthrough for From the heat pump to electrical connections the heat source (cold brine) Heating return From the heat source Heating flow to the heat pump (hot Expansion relief valve brine) drain hose Data plate 0020250180_00 geoTHERM Installation and maintenance instructions...
0 °C and heating flow temper- ature of 35 °C COP B0/W55 Coefficient of performance at a brine temperature of 0 °C and heating flow temperature of 55 °C Installation and maintenance instructions geoTHERM 0020250180_00...
Use an open hopper for the drain hose on the expansion relief valve in the heating circuit. ▶ Ensure that there is an option to divert any condensate Never transport the product as illustrated above. that forms. 0020250180_00 geoTHERM Installation and maintenance instructions...
Position the mounting template vertically over the in- stallation site. Attach the template to the wall, using tacks for example. Mark the drill holes for the unit mounting bracket on the wall. 0020250180_00 geoTHERM Installation and maintenance instructions...
To prevent excessive pressure losses on the heating Pull the lower section of the side casing forwards. water side, do not use stainless steel corrugated pipes. Lift the side casing up to remove it. Attach purging valves to the heating installation. Installation and maintenance instructions geoTHERM 0020250180_00...
▶ Have the hose end in such a way that nobody is at risk when steam and/or hot water is drained. Install a tundish for the expansion relief valve. 0020250180_00 geoTHERM Installation and maintenance instructions...
– Adey MC ZERO more than 10.0. – Fernox Antifreeze Alphi 11 – Sentinel X 500 ▶ If you have used the above-mentioned additives, inform the end user about the measures that are required. Installation and maintenance instructions geoTHERM 0020250180_00...
Only ethylene glycol in the specified ratio is authorised by ▶ Ensure that the brine pump is filled in the Vaillant as a brine fluid for operating the heat pump. direction of flow. Alternatively, suitable ready-mixed fluids for heat pumps can be ordered from Vaillant.
Undo the four clips on the rear cover (2) of the electron- secured to the 230 V terminal. ics box from the brackets (3) on the electronics box at the rear and at the sides. Installation and maintenance instructions geoTHERM 0020250180_00...
Page 19
Electrical installation 6 Hinge up the cover. Note the components and accessories in the relevant system instructions (→ Page 50) that you have to con- nect in the electronics box. 0020250180_00 geoTHERM Installation and maintenance instructions...
PWM1 High-pressure switch Electronic expansion valve Relay PCB X700 Compressor safety relay Cooling active signal, thermostatic radiator valve switch Compressor — — — Power supply Main PCB control line Main PCB mains connection transfer Installation and maintenance instructions geoTHERM 0020250180_00...
Page 21
+ DCF signal) Mains supply edge connector for the 2 in 7 addi- AI display edge connector tional module Environment circuit pump X100 eBUS (e.g. VRC 700 control) — X700 Compressor safety relay — 0020250180_00 geoTHERM Installation and maintenance instructions...
The installation assistant will close and will not launch described in the operating instructions for the heat pump. again when the product is next switched on. 7.1.1 Overview of the installer level menu structure Installer level overview (→ Page 31) 0020250180_00 geoTHERM Installation and maintenance instructions...
VWZ ZK accessory. Enviro. pump Target fixed value for the environment circuit set p. pump. This setting is used to adapt to the in- stalled environment circuit (e.g. ground probe or ground collector). Installation and maintenance instructions geoTHERM 0020250180_00...
Activate manual operation. because the pump speed is adjusted to the hydraulic resist- – Menu → Installer level → Configuration → Enable ance of the system. Vaillant recommends that you retain this limp home mode setting. Press the right-hand selection button ("...
▶ To determine which component is defective, read the Danger! fault memory. (→ Page 27) Risk of electric shock! Touching live connections may cause serious personal injury. Installation and maintenance instructions geoTHERM 0020250180_00...
Before starting up the unit, fit all of the casing sections for the heat pump. 10.1.5 Restarting the installation assistant You can restart the installation assistant any time by calling it Start up the heat pump system. up manually in the menu. 0020250180_00 geoTHERM Installation and maintenance instructions...
Remove the side casing. (→ Page 14) Close the service valves in the heating flow and in the heating return. Drain the heat pump if you want to replace water-carry- ing components in the heat pump. Installation and maintenance instructions geoTHERM 0020250180_00...
For smaller volumes, contact your local disposal com- Install the new pump with new seals. pany. Install new vapour-diffusion-tight insulating material around the pipelines. 12.2.3 Arranging disposal of refrigerant The product is filled with R410A refrigerant. 0020250180_00 geoTHERM Installation and maintenance instructions...
Refrigerant must only be disposed of by a qualified com- petent person. 13 Customer service Applicability: Belgium N.V. Vaillant S.A. Golden Hopestraat 15 B-1620 Drogenbos Belgien, Belgique, België Kundendienst / Service après-vente / Klantendienst: 2 3349352 Applicability: Germany Auftragsannahme Vaillant Kundendienst: 021 91 5767901 Installation and maintenance instructions geoTHERM 0020250180_00...
Build. pump starts Current value Environm. pump hours Current value 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. 0020250180_00 geoTHERM Installation and maintenance instructions...
Page 32
Open, closed Closed −60.0 ℃ T.146 Outside temperature 45.0 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. Installation and maintenance instructions geoTHERM 0020250180_00...
Page 33
Contact data Phone number 0 - 9 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. 0020250180_00 geoTHERM Installation and maintenance instructions...
General S.201 Check program: Purging of env. circuit active S.202 Check program: Purging of building circuit active S.203 Actuator test active Communication S.211 Connection error: Display not detected S.212 Connection error: Control not detected Installation and maintenance instructions geoTHERM 0020250180_00...
All consumers in the heating system flow rate of 150 l/h are closed – Check that the building circuit – Flow rate is too low for recording pump functions correctly with the volume flow sensor (< 120 l/h) 0020250180_00 geoTHERM Installation and maintenance instructions...
Page 36
– Check the quality of the plug dervoltage) and switched the pump contact on the PCB off as a securing measure. – Check that the pump functions correctly – Purging the environment circuit Installation and maintenance instructions geoTHERM 0020250180_00...
Page 37
(cooling mode) too low for com- sensor/actuator test) pressor operation – Check the compressor inlet – Refrigerant volume too low sensor, high-pressure sensor and low-pressure sensor – Check the refrigerant volume (700 g) – Leak-tightness test 0020250180_00 geoTHERM Installation and maintenance instructions...
To be able to achieve the B−10/W20 and B−10/W55 operating limits, you must change the freeze protection in the configuration from the factory setting to -13 °C. Basic hydraulic diagram Basic hydraulic diagram 0020232108 Heat pump Hydraulic tower Circulation pump Potable water expansion relief valve 0020250180_00 geoTHERM Installation and maintenance instructions...
Potable water expansion relief valve System control Safety group – drinking water connection Limit thermostat Heating diaphragm expansion vessel Outdoor temperature sensor Diaphragm expansion vessel – potable water Cylinder temperature sensor Single-room temperature control valve (thermo- static/motorised) Installation and maintenance instructions geoTHERM 0020250180_00...
Potable water expansion relief valve System control Safety group – drinking water connection Remote heat pump expansion module Heating diaphragm expansion vessel Outdoor temperature sensor Diaphragm expansion vessel – potable water Cylinder temperature sensor Bypass valve Multi-function output 0020250180_00 geoTHERM Installation and maintenance instructions...
If you have installed a low loss header between the heat pump and the heating installation, the VF2 system sensor in the flow of the low loss header must be attached to the heating installation. – Install the control in the living room. 0020250180_00 geoTHERM Installation and maintenance instructions...
For the parallel heating mode, the 2-zone kit (Vaillant accessory) must be installed. The heat pump, the gas-fired boiler and the required heating circuits are connected to the 2-zone kit. When using a 2-zone kit (Vaillant accessory), the two non-return flaps are not required.
Heating diaphragm expansion vessel Limit thermostat Diaphragm expansion vessel – potable water Outdoor temperature sensor Single-room temperature control valve (thermo- Cylinder temperature sensor static/motorised) Flow temperature sensor Filling/draining cock SysFlow Cylinder temperature sensor 0020250180_00 geoTHERM Installation and maintenance instructions...
Appendix Wiring diagrams Wiring diagram 0020232108 Heat pump System control Circulation pump Limit thermostat Combi cylinder (tank in tank) Outdoor temperature sensor Installation and maintenance instructions geoTHERM 0020250180_00...
Page 51
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 0020250180_00 geoTHERM Installation and maintenance instructions...
Page 52
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 Installation and maintenance instructions geoTHERM 0020250180_00...
Page 53
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 0020250180_00 geoTHERM Installation and maintenance instructions...
Page 54
Appendix Wiring diagram 0020185684 Heat generator eBUS bus coupler Heat pump Limit thermostat Circulation pump Outdoor temperature sensor System control Cylinder temperature sensor Installation and maintenance instructions geoTHERM 0020250180_00...
Page 55
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 0020250180_00 geoTHERM Installation and maintenance instructions...
Page 56
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 Installation and maintenance instructions geoTHERM 0020250180_00...
Need help?
Do you have a question about the geoTHERM and is the answer not in the manual?
Questions and answers