7
Take care when making a gas connection
to the heater not to apply excessive turning
force to the internal controls.
A flexible hose is installed to allow safe linear
expansion to each burner without creating
undue stress on the gas supply pipe work. It is
therefore important that a tested and certified
hose assembly made to ISO 10380, supplied
with ½” BSP female cone seat adapters, is
installed as per these instructions.
It is also important to ensure that expansion is
taken up in the body of the flexible hose, and
not on its attachment to the pipe work.
The cone seat adapter supplied on one end of
the flexible gas hose provides a `swivel` action,
and must be fitted on the burner using a ½”
BSP barrel nipple to provide ease of
disconnection for future servicing.
The installation layout described below is
the only method recommended by the
institute of gas engineers, the hose
manufacturer, and AmbiRad and must only be
carried out by a qualified/competent gas
engineer.
1.5 Gas Connection and Supply
A competent or qualified engineer is required to
either install a new gas meter to the service
pipe or to check that the existing meter is
adequate to deal with the rate of gas supply
required.
Installation pipes should be fitted in accordance
with BS 6896, so that the supply pressure, as
stated in Table 3 will be achieved. It is the
responsibility of the competent engineer to
ensure that other relevant Standards and
Codes of Practice are complied with in the
country of installation.
Pipes of smaller size than the heater inlet gas
connection must not be used. The complete
installation must be tested for soundness as
described in the country of installation.
The gas union service cock MUST be
fitted in the gas supply close to the heat-
er, but not onto the burner itself.
Before installation, check that the
local distribution conditions, nature of
gas and pressure, and adjustment of
the appliance are compatible.
Table 3 Gas Supply Pressures
Gas Category
G20 G31
Gas Type
Natural Gas Propane
Max Supply Pressure (mbar)
50 57.5
Min Supply Pressure (mbar)
17.5 25
Nominal Pressure (mbar)
20 37
Gas Supply
Connection R½ ½in BSP Internal Thread
G25
Natural Gas
50
20
25
G30
Butane
35
20
29
(20 paginas)
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