10
10
Distribution box
Distribution box
3-way
connector
3-way
connector
3-way
connector
3-way
connector
RG Cable
RG Cable
Towards terminal
Towards terminal
Damper actuator cable
Damper actuator cable
Towards damper
Towards damper
Only one damper
Air input or exhaust
Two dampers in parallel
input and air exhaust
Black
Red
2.7.4 Internal water cooling coil option
The internal water cooling coils are supplied with a motorised 3 way and pre-wired valve, "BW" control cable and a temperature probe (for measuring
the temperature of the fl uid circulating in the cooling coil). The "BW" cable and temperature probe are connected on one side of the control terminal.
On the other side, they are located in the raceway, ready to be connected by the installer.
Hydraulic connection of the 3-way valve and the cooling coil collectors (see section 2.8.4). When the hydraulic connections are completed, carry out
the cable connections for the internal water cooling coil (see wiring diagram below).
Internal water cooling coil 3-way valve actuator connection drawing
Towards unit connection terminal block
BW Cable
Temperature
probe
on 3-way valve
Heat pump-ON/OFF
Connector
male 3 pin
Connector
female 3-pin
3-way valve actuator cable
Towards 3-way valve
Collar clips
Water circuit
cooling coil
Temperature
probe
Insulation
3 way
valve
Actuators
Water circuit
cooling coil
Cold pump-ON/OFF
Connect the male "BW" cable plug to the actuator female socket ("BW" cable wires 1, 2, 3).
If required, connect the 4 free wires of the of the "BW" cable enabling the cooling coil water circuit pump (hot or cold) to be switched on or off. In the event
of a reversible cooling coil, the two pumps can be switched on or off ("BW" cable wires 4 and 5. power supply to hot water pump; "BW" cable wires 6 and 7
Power supply to cold water pump). Wires 4-5 and 6-7 are non-voltage relays.
Caution:
electrical connections of external appliances or those used in a damp environment must be watertight. It is recommended to protect the
connections between the actuator cable and the «BW» cable to a minimum of protection class of IPX5.
Locate the temperature probe on the 3-way valve of the internal cooling coil using a plastic snap fastener. To increase the accuracy of fl uid temperature
measurement, insulate the probe and 3-way valve.