Gas Connection - Viessmann Vitodens 100-W WB1B Installation And Service Instructions Manual

Installing the boiler and making all connections
Safety valve connection

Gas connection

Installation sequence
(cont.)
Connect safety valve drain A
(7 15 mm) with visible outlet B to
the dewatering system or route with
visible outlet through the external wall.
1. Connect gas shut-off valve to con-
nection A.
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 tight-
ness tests, separate the boil-
er and the gas valves from
the gas supply pipe (undo
the fitting).
3. Vent the gas supply pipe.
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