Eliminating System Air; Filling The Boiler With Water; Gas Supply - FULTON FHE-250 Installation, Operation & Maintenance Manual

2.8

ELIMINATING SYSTEM AIR

There is a factory-installed AAV (automatic air vent) on the heat exchanger.
The AAV must not be altered or removed.
2.9

FILLING THE BOILER WITH WATER

Adhere to the following:
1. Once the boilers have been installed and connected to the distribution system, open the
isolating valves on each boiler, the AAV's (automatic air vents) will vent any excess air in the
system.
2. Visually inspect all pipe joints and equipment connections for leaks. If necessary, drain system,
repair leaks and refill/purge the system. If no pressure drop is detected for a period of two hours
under pressure, the system may be considered watertight.
3. When purging is completed, make sure the following are open: combination shut-off/purge valve,
shutoff valve to pressure reducing (fill valve), shutoff valve in cold water fill line, and shutoff
valve in return line.
4. Make sure the following are closed: all drain cocks, the vent on the combination shutoff purge
valve, and all manual vents.
5. Open fuel shut-off valve, allowing fuel to flow to boiler.
2.10

GAS SUPPLY

The local gas supplier should be consulted at the installation planning stage in order to establish
the availability of an adequate supply of gas. An existing service pipe must NOT be used without
prior consultation with the local gas supplier.
A gas meter can only be connected by the local gas supplier, in UK by a Gas Safe Registered
Engineer or in IE by a competent person.
An existing meter should be checked, preferably by the gas supplier, to ensure that the meter is
adequate to deal with the dynamic rate of gas supply required. A minimum working gas pressure of
6.5 mbar MUST be available at the boiler inlet for Natural Gas.
Do not use pipes of a smaller size than the boiler inlet gas connection.
The complete installation MUST be tested for gas soundness and purged in accordance with the
appropriate standards.
Gas Boosters
A gas booster is required if the gas pressure available at the boiler is lower than 6.5 mbar. Boosted
gas supplies should not exceed 20 mbar.
Location of the booster requires careful consideration but should preferably be closer to the burner
rather than the gas meter. Ventilation should also be considered to ensure ambient temperatures do
not exceed designed recommendations. Further guidance is provided in IGEM/UP/2 (Institution of
Gas Engineers and Managers-Installation pipework on industrial and commercial premises.
Communication number 1729).
FHE-250 MANUAL 09 2014 ISSUE 2
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