Temperature Sensor; Pipe Connections - Nibe PCS 44 Installateurhandbuch

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 expan-
sion vessel. If there is a level vessel this should be re-
placed.
Check valve, mixing valve and circulation
pump
Install the supplied check valve between two T-pipe
■
connections to PCS 44 nearest the heat pump on brine
in (see the outline diagram).
Install the mixing valve (QN18) on the flow line to the
■
fan convector (port AB) so that port AB is open towards
port A when the motor is in idle mode. In the event of
a signal, port AB opens towards port B. The return line
from the fan convector is connected to the mixing
valve (port A) as well as brine in closest to the heat
pump.
Install the extra circulation pump (GP13) after the
■
shunt valve (QN18), on the supply line to the fan coil.
A
B
AB
PCS 44 | GB

Temperature sensor

Install the supply temperature sensor for the cooling
■
system (BT64) on the pipe after the circulation pump
(GP13) in the direction of flow.
Install the return line sensor for the cooling system
■
(BT65) on the pipe from the cooling system.
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.
Pump and pressure drop diagrams
Tillgängligt tryck (kPa)
Available pressure (kPa)
80
CC4
70
CC3
60
CC2
50
CP3
CC1
40
PP3
30 CP2
PP2
20
PP1 PP1
CP1
10
0
0 0,14 0.28 0,42
Flow (l/s)
Flöde (l/s)
500 1000 1500
Flöde (l/h)
Flow (l/h)
Choose between 10 different settings on the pump.
There are three different control curves for proportional
pressure (PP), or three different constant pressure (CP
and four constant curves (CC).
0,56 0,7 0,84 0,98
2000 2500 3000 3500
13