alterra WZSV-series – ground source inverter heatstations for indoor installation


Article Number 10072241

The space saver - the entire heating system on half a square meter.

Operating limit flow temperature 20°C to 65°C
Recommended range of application heat source -5°C to 25°C

The heat pumps are recommended for the following total heating demand:
WZSV 62H(K)3M = ca. 3-6kW; WZSV 92H(K)3M = ca. 6-9kW; WZSV 122H(K)3M = ca. 9-14kW.

For faster installation, the system comes with the following components:

  • Domestic hot water tank 178 l with impressed current anode
    (flow rate 240 l - ErP 40 °C, removal of 10 l / min)
  • Heat pump controller Luxtronik 2.1
  • Energy efficient circulation pump
  • Switching valve heating and domestic hot water preparation
  • Overflow valve heating circuit
  • Electronic heating element for support during heating operation and domestic hot water preparation
    (6 kW: WZSV 62H(K)3M and WZSV 92H(K)3M; 9 kW: WZSV 122H(K)3M)
  • vibration decoupling brine and heating circuit
  • Shut-off valve for the heat source circuit
  • Heat quantity recording
  • Refrigerating circuit in module box (can be removed for bring in)
  • Free Cooling (K-series)
  • Filled with fluorinated greenhouse gas R407C

Additionally delivery:

  • Shut-off valve (fill and drain valve) heating circuit
  • Outdoor sensor

Necessary accessories:

  • Safety assembly and expansion vessel for the heating circuit
  • Safety assembly and expansion vessel for the heat source circuit


Article Number 10072241
Equipment designation WZSV 62K3M
Capacity for heating (kW) 3,32 (B0/W35 part. load)
COP 4,86 (B0/W35 part. load)
Max. flow temperature 65
Cooling Yes
Heat source S/W
Indoor/ Outdoor installation Indoor installation
Detached/semidetached house* Yes
Multiple dwelling* No
Industrial building* No
New building* Yes
Refurbishment* Yes
Seasonal space heating energy efficiency ƞs (35°C) 199,4
Seasonal space heating energy efficiency ƞs (55°C) 149,9
Seasonal water heating energy efficiency class(the package of combination heater, temperature control and solar device) A
manual (400 V) EN
controller (part 1) EN
controller (part 2) EN
logbook EN
Energylabel EN

The operating instructions of the functionally necessary accessories such as hydraulic module or hydraulic station are stored in the "Downloads" tab under "ACCESSORIES".

* The data are only recommendations. Depending on individual circumstances, a heat pump with a lower heating capacity may also be suitable for larger buildings and vice versa. In addition, it is possible to connect several heat pumps together and thus increase the heating capacity. Finally, a precise individual calculation is required to select the really suitable system for the project.

Possible energy efficiency classes
Space heaters (35° C, 55° C): A+++ to D Ӏ Combined space heaters: A+++ to G Ӏ Combi heaters: A+++ to D Ӏ Hot water preparation: A+ to F Ӏ Combination combi heaters: A+++ to G Ӏ Hot water tanks: A+ to F Ӏ Domestic hot water preparation: A+ to F Ӏ Ventilation: A+ bis G

Technical changes and errors excepted