Viessmann VITOCAL 300-A Installation And Service Instructions Manual page 65

Electrical connections in the control panel
Note
In the delivered condition, the coding
card is affixed inside the control
panel. Remove the coding card and
insert into the control unit; see
page 80.
Overview of electrical connections in the control panel
A Transformer
B Fan control (230 V~)
C Sensor terminal strip (LV ≤ 42 V~)
D Refrigerant circuit control (con-
troller for electronic expansion
valve EEV)
E Plug rail
Installation sequence
(cont.)
F Only type AWC-I-M:
Control module, instantaneous
heating water heater (accessory)
Type AW-O-M:
The control module for the instan-
taneous heating water heater is
installed on the wall inside the
building adjacent to the instanta-
neous heating water heater (see
separate installation instructions).
G Mains terminals (230 V~) for the
compressor and fan with contact
shield and power-OFF seal if
required
65