DOMUSA DUAL CLIMA 11, Installation And Operating Instrictions

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DUAL CLIMA
26
9.6.6 Connecting the Heat/Cold diverter valve (G3)
When it is required to divert the water to different circuits depending on whether the machine is in
the Heating or Cooling mode (e.g. Heating by radiators and Cooling by fan-coils), a motorised 3-
way diverter valve must be installed between the machine and the installation. By means of this
valve, the electronic controller of the heat pump will divert the water to the heating circuit during
Heating mode or to the cooling circuit during the Cooling mode.
The electrical connection of the valve will be made between terminals G3C , G3O and G3N (Neutral)
of the component terminal of the heat pump. The motorised diverter valve can be equipped with 2
wires (with return spring) or 3 wires. If the valve is equipped with 2 wires, depending on its
hydraulic assembly, it must be connected in some terminals or others of said terminal. The
following figures describe the connection of each type of motorised valve:
2-wire valve 3-wire valve
HEATING
COOLING
NO
V3V (2 wires)
NC
HEATING
PUMP
G3C
G3N
HEATING
COOLING
NC
V3V (2 wires)
NO
HEATING
PUMP
G3O
G3N
HEATING
COOLING
V3V (3 wires)
HEATING
PUMP
G3C (COLD)
G3O (HEAT)
G3N
NO: Normally OPEN (not energising the motor).
NC: Normally CLOSE (not energising the motor).
IMPORTANT: Before carrying out any work on the electrical installation of the heat pump,
always ensure it is disconnected from the mains.