Draining heat pump on the secondary side
1. Close the on-site boiler drain & fill valve.
Checking sensors
■
For sensor connections to the controller and sensor
PCB: see page 29.
For the position of the sensors in the heat pump: see
■
Fig. 50 on page 64.
Sensor
Outside temperature sensor (F0)
■
Buffer temperature sensor (F4)
■
Cylinder temperature sensor, top (F6)
■
Cylinder temperature sensor, bottom (F7)
■
Flow temperature sensor, heating circuit with mixer M2/HC2 (F12)
■
System flow temperature sensor (F13)
■
Flow temperature sensor, cooling circuit (heating circuit without mixer A1/HC1 or sep-
■
arate cooling circuit SKK) (F14)
Room temperature sensor for separate cooling circuit (F16)
■
Boiler water temperature sensor, external heat generator (F20)
■
Buffer temperature sensor, cooling (F26)
■
Room temperature sensors
■
Sensors in the refrigerant circuit
■
Secondary circuit flow temperature sensor (F8)
■
Return temperature, secondary circuit (X25.11/X25.12)
■
Temperature sensor, air intake (X25.1/X25.2)
■
Temperature sensor, air discharge (X25.3/X25.4)
■
Viessmann NTC 10 k
Ω
Outside temperature sensor
200
100
80
60
40
20
10
8
6
-20
-10
0
Temperature in °C
Fig. 51
(marked blue)
10
20
30
2. Drain heat pump at drain valve: see Fig. 50 on
page 64.
Further sensors
20
10
8
6
4
2
1
0.8
0.6
0.4
10
30
50
Temperature in °C
Fig. 52
Maintenance
Test element
NTC 10 k
Ω
Pt500A
70
90
110
65