Pipe connections
GENERAL
Pipes and other cold surfaces must be insulated with
diffusion-proof material to prevent condensation. Where
the cooling demand is high, fan convectors with drip
trays and drain connection are needed.
The brine circuit must be provided with a pressure ex-
pansion vessel. If there is a level vessel this should be
replaced.
INSTALLATION PRINCIPLE
Circulation pump
The circulation pump’s permitted positions.
Shunt
The shunt’s permitted positions.
CHECK VALVE, MIXING VALVE AND
CIRCULATION PUMP
• Install the enclosed non-return valve (RM5) between
two T-pipe connections to PCS 44 nearest the heat
pump on brine in (see the outline diagram).
• Fit the shunt valve (QN18) as follows:
- Port AB is fitted to the supply line to the fan coil.
- Port B is fitted to the return line from the fan coil.
- Port A is fitted to brine out from the heat pump.
As shown in the illustration below, the red markings
show the position of the valve when the motor is in
standby mode, when port AB is open to port B. On a
signal, port AB opens to port A.
• Install the extra circulation pump (GP10) after the
shunt valve (QN18), on the supply line to the fan coil.
LEK
A
AB
B
TEMPERATURE SENSOR
• Install the supply temperature sensor for the cooling
system (BT64) on the pipe after the circulation pump
(GP10) in the direction of flow.
• Install the return line sensor for the cooling system
(BT65) on the pipe from the cooling system.
LEK
LEK
E
Install the temperature sensors using cable ties, together
with the heat conducting paste and aluminium tape.
Then insulate with the enclosed insulation tape.
NOTE
Sensor and communication cables must not
be placed near power cables.
PCS 44 F-series | GB
80
F