Draining The Heat Pump On The Primary/Secondary Side; Checking Sensors; Temperature Sensors, Type Ntc 10 Kω - Viessmann Vitocal 300-G Pro Installation And Service Instructions For Contractors

Overview of internal components
Sight glass, oil level, compressor 1 and 2
qE
(only type BW 302.C090 to BW 302.C230)
Hot gas temperature sensor
qR
Filter dryer
qT
2nd parallel filter dryer
qZ
(only type BW 302.C090 to BW 302.C230)
Plate condenser
qU
Plate evaporator
qI
Return temperature sensor, primary circuit (outlet)
qO

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
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
■
Flow/return temperature sensors, primary circuit/secondary
■
circuit (X25)
Temperature sensors, type NTC 10 kΩ
20
10
8
6
4
2
1
0.8
0.6
0.4
10 30 50 70
Temperature in °C
Fig. 37
(cont.)
90 110
Flow temperature sensor, secondary circuit (outlet)
wP
Flow temperature sensor, primary circuit (inlet)
wQ
Return temperature sensor, secondary circuit
wW
(inlet)
Sight glass, refrigerant
wE
wR Vibration absorber
Schrader valve
wT
Dryer bracket
wZ
Test element
NTC 10 kΩ
Pt500A (PTC)
Repairs
Connection/installation
position
See controller and sensor
PCB, see page 42.
65