22
Connection to the switching contact on the heat
pump control unit
If the external heat generator is directly connected to
the switching contact on the heat pump control unit,
the 230 V signal must be converted (for switching con-
tact, see pos.
D
in Fig. 42, page 56).
N
L
A1
A2
K1
A
B
C
D
Fig. 19
A
Connection to heat pump control unit
B
Connection to external heat generator control unit
C
Temperature sensor, external heat generator
D
Resistor
Resistance subject to external heat generator tem-
perature sensor
External heat generator
temperature sensor
C
Resistor
D
NTC 10 k
Ω
2.2 k
Ω
Pt500
680
Ω
Pt1000
1.3 k
Ω
Installation sequence
Electrical connections
(cont.)
5788 057 GB
Installation
