34
Plug
Sensor
Type
a:D
A
PWM signal, primary pump
a:D
B
PWM signal, secondary pump
a:D
C
PWM signal, circulation pump for cylinder heating
Note
Flow temperature sensor for heating circuit with
mixer M3/HC3:
The flow temperature sensor for one
heating circuit with mixer M3/HC3 is connected to the
mixer extension kit (accessories).
Connecting the primary circuit flow/return temperature sensor, 2-stage heat pump
<42 V
1.
[G
X
3.
aS
aS
aD
aD
aS
aD
aS
aD
aS
aD
[XG
X
2.
Fig. 20
aS
Flow temperature sensor, primary circuit
aD
Return temperature sensor, primary circuit
!
Please note
Unmarked sensor leads cannot be uniquely
identified, e.g. during diagnosis.
Mark sensor leads.
!
Please note
If sensor lead wires drift into the adjacent volt-
age area, this can cause appliance damage,
e.g. when a wire comes loose.
Secure sensor leads and stripped leads (with
plug
aS
/
aD
) to the other low voltage leads using
the cable ties provided.
Installation sequence
Electrical connection
(cont.)
5855006
Installation
