Pipe Connections; Temperature Sensor - 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 supplied with a pressure ex-
pansion vessel. If there is already a level vessel installed
this should be replaced.
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 1) so that port 1 is open to-
wards port 2 (blue coloured) when the motor is in
idle mode. In the event of a signal, port 1 opens
towards port 3 (red coloured). The return line from
the fan convector is connected to the mixing valve
(port 2) as well as brine in closest to the heat pump.
Install the extra circulation pump (GP13) after the
mixing valve (QN18) on the flow line to the fan
convector.
3
1
Colour marking
2

Temperature sensor

Install the flow 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 with cable ties with the
heat conducting paste and aluminium tape. Then insu-
late with supplied insulation tape.
NOTE
Sensor and communication cables must not
be placed near power cables.
Pump and pressure drop diagrams
Available pressure
Tillgängligt tryck
kPa
kPa
70
60
50
CP2
40
30
20
10
Speed II
Speed I
0
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
0 0,1 0,2 0,3
Choose between seven settings on the pump. You can
choose between three different constant speeds (I, II
or III) or two different curve types, one proportional
pressure (PP) and one constant pressure (CP), where 1
is lowest and 2 highest.
CP1
PP2
PP1
Speed III
0,4 0,5 0,6 0,7
GB
Flow Flöde
l/h
l/s
11