Viessmann Vitogas 200-F GS2 Service Instructions Manual page 12

Commissioning, inspection, maintenance
Further details regarding the individual steps
11. Open the gas shut-off valve and
check top test nipple A for gas
tightness.
Supply (flow) pres-
sure for natural
gas
Below 17.4 mbar
(1.74 kPa)
17.4 to 25 mbar
(1.74 to 2.5 kPa)
Above 25 mbar
(2.5 kPa)
12
Supply (flow)
pressure for LPG
(at 50 mbar,
5 kPa pre-charge
pressure)
Below 42.5 mbar
(4.25 kPa)
42.5 to 57.5 mbar
(4.25 to 5.75 kPa)
Above 57.5 mbar
(5.75 kPa)
Danger
Gas escaping from the test
nipple leads to a risk of
explosion.
Check the test nipple for gas
tightness.
Action
Do not start the boiler. Notify your gas
supply utility or LPG supplier.
Start the boiler.
Position a separate gas pressure gover-
nor upstream of the system and regulate
the pre-charge pressure to 20 mbar
(2 kPa) for natural gas or 50 mbar
(5 kPa) for LPG.
Notify your gas supply utility or LPG sup-
plier.
(cont.)