57
Overview of connections: External unit
Vitocal 222-S, type AWT-AC
221.A04
221.A07
221.A10 and A13
A
A
A
A
Wiring chamber:
■ BUS connection to the internal
unit
Note
Do not interchange the BUS con-
nection wires between the internal
and external units.
■ Compressor power supply
Installation sequence
Electrical connection
(cont.)
5600 950 GB
Installation