Viessmann Vitocal 222-A - Page 64

64
A
B
C
Fig. 55
A
Operation
B
Drain the drinking water circuit in the appliance
excluding the DHW cylinder via the cold water
connection
C
Drain the drinking water circuit in the appliance
and the DHW cylinder via the DHW connection.
The cold water connection remains filled.
1. Connect the hose to the drain valve and route it
into a suitable container or drain outlet.
Note
Ensure adequate ventilation in the DHW pipework.
2.
Turn drain valve from lever position
A
to lever
position
B
or
C
as required.
Cleaning the DHW cylinder
According to EN 806, a visual inspection and (if neces-
sary) cleaning must be carried out no later than 2
years after commissioning, and as required thereafter.
1.
8x
BA
2.
Fig. 56
Commissioning, inspection, maintenance
Draining the appliance on the DHW side
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