50
7
Compressor 2
(only type BW 302.CS090 to BW 302.CS230)
8
Compressor 1
9
Sight glass, oil level, compressor 1 and 2
(only type BW 302.CS090 to BW 302.CS230)
qP
Filter dryer
2nd parallel filter dryer
(only type BW 302.CS090 to BW 302.CS230)
qW
Plate condenser
qE
Plate evaporator
qR
Return temperature sensor, primary circuit (outlet)
qT
Flow temperature sensor, secondary circuit (outlet)
qZ
Flow temperature sensor, primary circuit (inlet)
qU
Return temperature sensor, secondary circuit (inlet)
qI
Sight glass, refrigerant
qO
Vibration absorber
wP
Schrader valve
wQ
Dryer bracket
wW
Contact temperature sensor (beneath the insulation); see position 0008 on page 54
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
Sensor
Test element
Connection/installation
position
■
Outside temperature sensor
■
Flow temperature sensor, secondary circuit
■
Flow temperature sensor, cooling circuit
Pt 1000
See separate wiring dia-
gram
■
Buffer temperature sensor
■
Cylinder temperature sensor
■
Flow/return temperature sensor, secondary circuit
Pt 1000
■
Contact temperature sensor
Temperature sensors type Pt 1000
1600
1500
1400
1300
1200
1100
1000
900
800
Resistance
in Ω
Temperature in °C
-50
0
50
100
150
Fig. 26
Note
All sensors can be checked via the temperature
displays in the program. If a sensor still needs to
be tested directly, one of the 2 sensor connections
must be separated from the controller. Otherwise
the measuring device will indicate false values or
can sustain damage.
Repairs
Overview of internal components, Vitocal 300-G
(cont.)
5789 986 GB
Maintenance
