Viessmann AC-Box - Switching to Heat Pump Control Unit (NC; AC Signal); Shutdown Signal for Heat Pump 230 V

16
Switching to heat pump control unit (NC / AC signal)
4
N
?
3
2
1
N N N N
1
? ? ?
123
X6
X1
X2
123
sYÖsYAsYSsYD
4 1235
F
12
171D
1
2
GNYE
171E
1
2
GNYE
BU BN BU BN
A
?
E
D
C
B
Fig.8
Note
Plugs
aMAD
and
aMAE
are plugged into the AC-Box
PCB at the factory.
A
AC-Box PCB
B
"AC signal" connecting cable
C
"NC Signal" connecting cable
D
Heat pump control unit Vitotronic 200
E
Cross connect PCB
X1 Earth conductor terminal strip
X2 Neutral conductor terminal strip
F
Main PCB (function components 230 V~)
Shutdown signal for heat pump 230 V~
The frost stat and contact humidistat 24 V– are con-
nected to the AC-Box. The shutdown signal must be
connected at the heat pump control unit to ensure the
compressor stops when these safety devices respond.
Installation sequence
Electrical connection (cont.)
5675 895 GB
Installation