Overview Of Internal Components; Checking Sensors; Temperature Sensors - Viessmann BW 35 .AHT PW Series Installation And Service Instructions Manual

Overview of internal components

Fig. 39
Return temperature sensor, secondary circuit
qO
Primary circuit return temperature sensor (heat
wP
pump brine outlet)
Electronic expansion valve (EEV)
wQ
Flow temperature sensor, secondary circuit
wW
wE Sight glass, liquid line
Primary circuit flow temperature sensor (heat
wR
pump brine inlet)
Draining the heat pump on the primary/secondary side
Drain the heat pump at the on-site drain valve on the
primary/secondary side.

Checking sensors

For connections, see from page 41 and "Connection
and wiring diagram".

Temperature sensors

Sensor
System flow temperature sensor
■
Buffer temperature sensor
■
Cylinder temperature sensor
■
Flow/return temperature sensor, heat-
■
ing circuit
All sensors inside the heat pump
■
(cont.)
For the installation position, see from page 54.
Test ele-
ment
Pt1000
Repairs
55