Gas Connection - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Installing the boiler

Gas connection

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Fig. 9
1. Seal gas shut-off valve
Information on operation with LPG
Install an external safety solenoid valve if the boiler
is installed below ground level.
2. Carry out a tightness test.
Note
Only use suitable and approved leak detection
agents (EN 14291) and devices for the tightness
test. Leak detection agents with unsuitable constit-
uents (e.g. nitrides, sulphides) can cause material
damage.
Remove residues of the leak detection agent after
testing.
!
Please note
Excessive test pressure will damage the
boiler and the gas train.
Max. test pressure 150 mbar (15 kPa).
Where higher pressure is required for tight-
ness tests, disconnect the boiler and the gas
train from the main supply pipe (undo the fit-
ting).
16
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A to the gas connection.
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3. Purge the gas line.
Conversion to alternative gas types:
See page 36.