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

Page: 33 / 140

33
Indoor unit: routing cables to the wiring chamber
400/230 V
> 42 V
< 42 V
Fig. 25
A
Power cables to switching module for instantane-
ous heating water heater 230 V~/400 V~
B
Connecting cables for 230 V~ components
C
LV connecting leads (sensors, KM-BUS) < 42 V
D
Type AWT/AWT-AC 221.A10/A13, 221.B10 to
B16
:
Bus cable 12 V: routing in the 230 V~ voltage area
(for connection, see page 41)
E
Type AWT/AWT-AC 221.A04 to A07 :
Bus cable 43 V: routing in the 230 V~ voltage area
(for terminals, see page 41)
F
Heat pump control unit 230 V~ power cable
Installation sequence
Electrical connection
(cont.)
5776 028 GB
Installation