124
O
Secondary pump (accessory for
type BW 301.A)
P
Air vent valve on the secondary side
Q
Low pressure sensor EEV
R
Suction gas temperature sensor
S
Safety high pressure switch
T
High pressure sensor EEV
U
Filter dryer
V
Primary circuit return temperature
sensor (heat pump brine outlet)
W
Drain valve, primary side
X
Hot gas temperature sensor
Draining the heat pump on the primary/secondary side
1.
Shut off the connection to the heating
network.
2.
Drain heat pump at drain valve on pri-
mary/secondary side (see
page 122).
Checking sensors
Sensor connections to the controller and
sensor PCB.
For the position of the sensors in the heat
pump, see diagram on page 122.
Temperature sensors type Ni 500
400
-40 -20
0
Resistance in
Temperature in °C
440
480
520
560
600
20 40 60
640
Capturing element: "Ni 500"
■ Outside temperature sensor (F0)
■ Flow temperature sensor, heating cir-
cuit M2 (F12)
■ Flow temperature sensor, separate
cooling circuit
■ Room temperature sensors
Troubleshooting
Repairs
(cont.)
5600 161 GB
Summary of Contents for BW 01.A06
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