DOMUSA TEKNIK DUAL CLIMA R, Installation And Operation Instructions Manual

Page: 31 / 84

31 DUAL CLIMA R
Voltage-free connection
When the input to manage the activation of the backup energy source is voltage-free type (i.e. room
thermostat input, phone relay input, etc.), it is necessary to isolate the powered output of the heat
pump (
E2 ) from the voltage-free input of the backup energy source, by means of installing a relay
between them. To perform correctly this electrical installation follow carefully the diagram below:
IMPORTANT: Before carrying out any work on the electrical installation of the heat pump,
always ensure it is disconnected from the mains.
6.6.7 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 in terminals G3S and N (Neutral) of the component
terminal of the heat pump. The motorised diverter valve has to be equipped with 2 wires (with return
spring) or 3 wires with phase return. In the latter case, the phase wire of supply of the valve (line)
must be connected in the terminal
L of the terminals strip. The following figures describe the connection
of the motorised valve:
HEATING
COOLING
NC
V3V
NO
HEAT PUMP
N
G3S
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.
E1L
E2L N
N
G2S G3S N
L
C H COM