Do not change the boiler fuel without consulting the boiler manufacturer.
A qualified installer, service agency or the gas supplier must perform installation and service on the fuel delivery
system.
Do not use naked flames or other sources of ignition to check for gas leaks.
Some suitable leak-detection spray used for leak testing is corrosive to certain types of metals.
Clean all piping thoroughly after completing the leak check.
Gas piping must be installed in compliance with all applicable codes.
Adhere to the following for installation:
1.
No changes shall be made to the factory fuel train.
2.
The pipe and fittings used must be new and free of dirt or other deposits.
3.
The piping must be of the proper size to ensure adequate gas supply to the gas head
assem
bly without a pressure loss. Consult your gas company for specific recommendations.
4.
When making gas piping joints, use a sealing compound resistant to the action of
liquefied petroleum gases. Do not use PTFE tape on gas line threads, always use a
sui
table gas paste.
5.
Piping must be installed such that no piping stresses are transmitted to the equipment. The
equipment shall not be used as a pipe anchor.
6.
Components may have vent connections which must be vented per local codes.
7.
After gas piping is completed and before wiring installation is started, carefully check all
piping connections (factory and field) for gas leaks.
8.
All gas piping must be arranged so that it does not interfere with any cover or burner, inhibit
ser
vice or maintenance, or prevent access between unit and walls or another unit.
Verify that the burner is suitable for the type of gas being supplied. Ensure that an appl
iance
isolation valve is inserted in the line between the boiler and the meter. To avoid pressure drops,
eliminate all unnecessary bends and elbows in the pipework between the gas meter and the
boiler. A scale trap is provided on the gas train and should be used.
Burners suitable for operation on natural and manufactured gas are supplied with gas trains or a
modular gas head.
A minimum working pressure of 18 mbar at the specified flow rate, is required at the gas train for
natural gas installations.
If the gas supply is in excess of 35 mbar for Natural gas a suitable regulator is required before the
main gas valve.
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