Gas Connection - Viessmann VITODENS 200-W Installation Instructions Manual

Gas connection

1. Seal in gas shut-off valve A at the
gas connection.
2. Carry out a leak/tightness test.
!
Please note
Excessive test pressure
may damage the boiler and
the gas valve.
Max. test pressure
150 mbar. Where higher
pressure is required for
tightness tests, separate the
boiler and the gas valves
from the gas supply pipe
(undo the fitting).
3. Vent the gas supply pipe.
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