65
qE
Sight glass, oil level, compressor 1 and 2
(only type BW 302.C090 to BW 302.C230)
qR
Hot gas temperature sensor
qT
Filter dryer
qZ
2nd parallel filter dryer
(only type BW 302.C090 to BW 302.C230)
qU
Plate condenser
qI
Plate evaporator
qO
Return temperature sensor, primary circuit (outlet)
wP
Flow temperature sensor, secondary circuit (outlet)
wQ
Flow temperature sensor, primary circuit (inlet)
wW
Return temperature sensor, secondary circuit
(inlet)
wE
Sight glass, refrigerant
wR
Vibration absorber
wT
Schrader valve
wZ
Dryer bracket
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 (F0)
■
Buffer temperature sensor (F4)
■
Cylinder temperature sensor (F6/F7)
■
Flow temperature sensor, heating circuit M2/HC2 (F12)
■
System flow temperature sensor (F13)
■
Flow temperature sensor, cooling circuit (heating circuit with-
out mixer A1/HC1 or separate cooling circuit SKK) (F14)
■
Boiler water temperature sensor, external heat generator
(F20)
■
Room temperature sensors
■
All sensors in the heat pump refrigerant circuit
NTC 10 kΩ
See controller and sensor
PCB, see page 42.
■
Flow/return temperature sensors, primary circuit/secondary
circuit (X25)
Pt500A (PTC)
Temperature sensors, type NTC 10 kΩ
10
Temperature in °C
Resistance in kΩ 0.4
0.6
2
4
10
20
0.8
1
6
8
30
50
70
90 110
Fig. 37
Repairs
Overview of internal components
(cont.)
5787 232 GB
Maintenance
Summary of Contents for BW 301.C090
Page 91: ...91 5787 232 GB...
