Checking The Gas Supply Pressure - Wolf MGK-2-390 Installation Instructions Manual

Countries, gas categories and connection
pressures
If the supply pressure is outside the specified range,
Caution
adjustments must not be carried out and the boiler
must not be started.
Check the gas supply pressure (gas flow pressure)
Work on gas components must only be
performed by a licensed gas fitter. Work
that is carried out incorrectly may lead to
gas escaping, resulting in a risk of
explosion, suffocation or poisoning.
• Switch ON/OFF switch on the appliance to OFF.
• Release the plug at the test nipple with two turns.
• Slowly open the gas shut-off valve.
• Bleed off escaping gas via a hydraulic seal
until no more air escapes.
• Connect the differential pressure tester at the
pressure test nipple to "+", with "-" against
atmosphere.
• Switch the ON/OFF switch to ON.
After starting the boiler, check the supply pressure
at the differential pressure tester.
• Switch the ON/OFF switch to OFF. Close the gas
shut-off valve.
• Remove the differential pressure tester.
Re-seal the test nipple with the plug.
• Open the gas shut-off valve.
• Check the test nipple is gas-tight.
• Refit the burner hood.
If any screws are not tightened, there is a
danger of gas escaping, leading to a risk
of explosion, suffocation or poisoning.
54

30. Checking the gas supply pressure

Country
EN
AT, BG, CH, CZ, DK, EE,
ES, FI, GB, GR, HR, IE,
IS, IT, LT, LV, NO, PT,
RO, RU, SE, SI, SK, TR
LU
PL
BE
FR
HU
NL
Pressure test nipple
Appliance Supply pressure
in mbar
category
Natural Natural gas
gas
Nom. Min. Max.
I2ELL 20 18
I2H 20 18
I2E 20 18
I2ELw 20 18
I2E(R) 20/25 18
I2Esi 20/25 18
I2HS 25 18
I2L 25 18
3063772_201507
25
25
25
25
30
30
30
30