Gas Connection - Alpha Pro Tec 48NX Design, Installation And Servicing Instructions

1.10 Gas coNNEcTIoN

Our appliances are built to work with natural gas (G Z50, G27), LPG and mixtures of methane and hydrogen up to 20% in volume
(20%H2NG). Power supply pipes must be the same as or larger than the appliance fitting.
Before connecting the gas line, carefully clean inside all the fuel feed system pipes to remove any residue that could impair
appliance efficiency.
Also make sure the gas corresponds to that for which the appliance is prepared (see appliance data nameplate).
If different, the boiler must be converted for operation with the other type of gas (see converting appliance for other gas types).
It is also important to check the dynamic pressure of the mains (methane or lPG) used to
supply the boiler and its attachment, as insufficient levels may reduce generator output and
cause discomfort to the user.
static/dynamic network pressures higher than those required for regular operation may cause
serious damage to the appliance control elements; in this case shut the gas line off.
Do not operate the device.
Have the device checked by experienced personnel.
The gas supply pipe must be suitably dimensioned according to current regulations in order to guarantee correct gas flow rate to the
burner even in conditions of maximum generator output and to guarantee appliance efficiency (technical specifications).
The internal gas supply system must be built in compliance with the provisions and regulations and all legislation in force, and any other
reference on good technique.
The appliance is designed to operate with fuel gas free from impurities; otherwise it is advisable to fit special filters upstream of
the appliance to restore the purity of the fuel.
storage tanks (in case of supply from lPG depot).
- New LPG storage tanks may contain residual inert gases (nitrogen) that degrade the mixture delivered to the appliance casing
functioning anomalies.
- Due to the composition of the LPG mixture, layering of the mixture components may occur during the period of storage in the tanks.
This can cause a variation in the calorific value of the mixture delivered to the appliance, with subsequent change in its performance.
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