Electrical Connections; Opening The Hmu Wiring Chamber - Viessmann VITODENS 222-F Installation And Service Instructions Manual

Electrical connections

Opening the HMU wiring chamber

!
Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Prior to commencing any work, touch earthed
objects, such as heating or water pipes to dis-
charge static loads.
3.
1.
Fig. 10
Note
For further information on the connections, see the fol-
lowing chapters.
A B
40 156 156
Fig. 11
Connections to 230 V~ plugs
Power supply
fÖ
230 V input, floating
lH
Output 230 V
Switched power outlet
aBH
2x
2.
M M
1~ 1~
96
P1 P2
6 5 4 3 2 1
C
6 5 4 3 2 1
74 5 1
P1 Cylinder loading pump (connected in the deliv-
ered condition)
Installation sequence
91 91
17