Burner Connection On The Gas Supply Side - Viessmann Vitocrossal 200 Installation Instructions Manual

Burner connection on the gas supply side

1. Connect the mains gas according
to TRGI 1986/1996 [or local regula-
tions].
Note
According to the [German] Com-
bustion Order, a thermal shut-off
facility must be installed into the
gas supply line.
The installation of a gas filter into
the supply line is recommended, if
the gas line has been contaminated
(e.g. old pipes with corrosion pro-
ducts).
Gas supply pressure: 20 mbar
Max. permissible gas supply pres-
sure: 50 mbar
Gas connection:
87 to 186 kW: R 1"
246 and 311 kW: R 1¼"
18
2. Carry out a soundness test.
!
Please note
Excessive test pressure
may damage the burner and
the gas valve.
Maximum test pressure
150 mbar. If a higher pres-
sure is required for sound-
ness tests, separate the
boiler and the gas train from
the gas supply pipe (undo
the compression fitting).
3. Vent the gas supply pipe.
Danger
Escaping gas can lead to
explosions which may lead
to serious injury.
The gas pipe should not be
vented through the boiler
combustion chamber.