12
11.
Open the gas shut-off valve and
check top test nipple
A
for gas
tightness.
Danger
Gas escaping from the test
nipple leads to a risk of
explosion.
Check the test nipple for gas
tightness.
Supply (flow) pres-
sure for natural
gas
Supply (flow)
pressure for LPG
(at 50 mbar,
5 kPa pre-charge
pressure)
Action
Below 17.4 mbar
(1.74 kPa)
Below 42.5 mbar
(4.25 kPa)
Do not start the boiler. Notify your gas
supply utility or LPG supplier.
17.4 to 25 mbar
(1.74 to 2.5 kPa)
42.5 to 57.5 mbar
(4.25 to 5.75 kPa)
Start the boiler.
Above 25 mbar
(2.5 kPa)
Above 57.5 mbar
(5.75 kPa)
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.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5692 704 GB
