Section 10: Gas Piping
All Gas Pipe-work to the appliance should be installed in accordance with
current regulations, local and national codes and must be connected with an
acceptable gas isolation valve and union, so that the burner maybe removed
to aid servicing and inspection of the burner.
Size and Connection
The following considerations are to be taken into account:
a)
Pipe work smaller than the inlet gas connection should not be used.
b)
The gas supply pipe is adequately sized to carry correct volume of gas from
the gas meter to the heater(s).
c)
The heat input and gas flow rates for each heater can be found in section 4
table 1 to aid in the design of gas supply pipe work.
d)
All gas pipe work and electrical connections must be adequately supported
and must not support any of the heaters weight or rely on the strength of the
burner gas pipe work.
e)
Unless the heater is suspended or movement is apparent, the BMM Heater
must be connected with medium, heavy or copper pipe; otherwise the use
of an approved flexible connection between the isolating valve and the
heater can be used. We recommend that the flexi hose is one size bigger
than the heater connection to reduce any pressure loss.
The minimum inlet gas pressure for natural gas should be 20 mbar.
Please note
: We require a minimum of 17.5mbar at the inlet when running and a
maximum of 75mbar, if this is exceeded then a governor must be fitted.
Important:
The complete installation must be purged and tested for gas
soundness in accordance with local, national codes and a registered engineer.
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