65
qO
Vibration absorber
wP
Schrader valve
wW
Immersion temperature sensor
wE
Ball shut-off valve with Schrader valve
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 the position of the sensors in the heat pump: See
Fig. 41.
For sensor connections: See controller and sensor
PCB, page 42.
Sensor
Test element
■
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 without 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
■
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. 42
Repairs
Overview of internal components
(cont.)
5838144
Maintenance
Summary of Contents for Vitocal 300-G Pro BW 302.D090
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