Commissioning Gas Connection - Wolf CGU-2-18 Installation And Maintenance Instructions Manual

Only qualified personnel must carry out the
commissioning and boiler operation as well
as the user instruction to prevent dangers
and injuries as well as material losses.
Commissioning gas train:
Prior to commissioning, ensure that the boiler corresponds
to the gas type available.
Gas type
Natural gas H 11.4 - 15.2
LPG P 20.3 - 21.3
- The boiler and system must be fully vented and must
be absolutely tight.
- If the system water pressure falls below 1.5 bar, top
up with water until a pressure of 1.5 to max. 2.5 bar
has been achieved.
- Check that all flue gas accessories have been correctly
installed.
- The gas fired boiler must be switched OFF. Open the
gas shut-off valve.
- Remove the casing cover.
- Release the plug at test nipple  and vent the gas
supply pipe.
3062347_0309
Start-up gas connection
Wobbe index Ws
kWh/m³ MJ/m³
40.9 - 54.7
72.9 - 76.8

- Connect the hose to the pressure test appliance at
test nipple  and check against atmosphere.
Gas type Nominal supply pressure,
Permissible range
Natural gas H 20 mbar
LPG P 50 mbar
LPG P 37 mbar
LPG P 29 mbar
Never take the boiler into use if the actual value falls
outside the specified limits.
→ Notify gas supply utility.
- Read off value and enter in the commissioning
report.
- Pull the hose off and tighten the test nipple again.
- Retighten the plug.
- Start the boiler.
- Check the ignition and the regular flame structure of
the burner.
Check test nipple  for gas-tightness,
otherwise gas may escape, resulting
in a risk of explosion, asphyxiation or
poisoning.
18 - 25 mbar
43 - 57 mbar
25 - 45 mbar
25 - 35 mbar
33