Viessmann Vitocal 300-G Installation And Service Instructions For Contractors page 69

Electrical connections in the heat pump control...
Type BWS
A Transformer, EEV PCB
B EEV PCB (electronic expansion
valve)
C Compressor contactors, control unit
starter, three-phase monitor
D Cable channel
E Compressor power supply
F Cross connect PCB
E
N
M
D
C
B
A
G Main PCB
H Main PCB extension
K Controller and sensor PCB
L Programming unit
M Plug for connecting cable stage 1/2
230 V~
N Plug for connecting cable stage 1/2,
low voltage
Installation sequence
(cont.)
69