DOMUSA DUAL CLIMA 11, Installation And Operating Instrictions

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9.6.5 Connecting the DHW diverter valve (G1)
When installing an DHW tank in combination with the heat pump, a motorised 3-way diverter valve
must be installed between the unit and the installation. By means of this valve, the electronic
controller of the heat pump will divert the water to the DHW tank (in DHW mode) or to the
heating/cooling circuit (in heating or cooling mode).
The electrical connection of the valve will be made in terminals G1C , G1O and G1N (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. The following figures describe the
connection of each type of motorised valve:
2-wire valve 3-wire valve
HEATING
D.H.W.
NO
V3V (2 wires)
NC
HEATING
PUMP
G1C
G1N
HEATING
D.H.W.
NC
V3V (2 wires)
NO
HEATING
PUMP
G1O
G1N
HEATING
D.H.W.
V3V (3 wires)
HEATING
PUMP
G1C (DHW)
G1O (HEAT)
G1N
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.