Viessmann AWT 221.A04, Installation And Service Instructions For Contractors

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Plug Component
F101 Fuse 1.0 A L (slow)
P202 Bus connection (12 V to outdoor unit for type AWT/AWT-AC 221.A10/A13, 221.B10 to
B16)
P203 Bus connection (43 V to outdoor unit for type AWT/AWT-AC 221.A04 to A07)
Note
■
Only one BUS connection should be connected.
■
Do not interchange the BUS connection wires
between the internal and external units.
■
Route the BUS connecting cable in the 230 V~ volt-
age area.
Outdoor unit: overview of connections
Opening the outdoor unit wiring chamber
Type AWT/AWT-AC
221.A04
221.A05/A07 221.A10/A13/B10/B13/B16
A
Fig. 31
A
Fig. 32
A
Fig. 33
A Wiring chamber:
■ BUS connection to the internal unit
Note
Do not
interchange the BUS connection wires
between the internal and external units.
■ Compressor power supply
Installation sequence
Electrical connection
(cont.)
5776 028 GB
Installation