Page 79 - B8773-AEW-XX-XX-PP-A-0001_[P8]_Contractors Manual

4.4 Gas

4.4.1 Gas Installation
• The gas installation shall commence at • The ventilation control panel supplier will also
the outlet of the gas meter in the position provide a suitable 42mm gas solenoid valve
indicated on the drawing. for installation, in the oven supply pipe, by
the main contractor’s Gas Safe registered
• Gas pipework shall be light gauge copper (commercial classification) engineer.
tube, to BS EN 1057 (1996), and shall be sized
to carry the load of all ovens and gas fired • It is the main contractor’s responsibility to
water heater operating simultaneously. ensure that the gas pipe is purged through
the valve before hand-over of the system.
• The main pipe run to the ovens must always If this is not done and the oven installers are
be run in 42mm pipe. unable to complete their commissioning,

• The gas supply to all ovens shall be any subsequent call backs will be charged
terminated at outlets / branches to suit the to the main contractor.
oven manufacturers requirements. • In all cases, the final “Quick Disconnect”

• As far as possible the gas supply shall be gas hoses and fittings will be supplied
concealed from public view. and installed by the oven commissioning
engineer.
• Lever type stop-cocks shall be provided in
such a position that they are easily accessible • Testing and commissioning certificates must
and would enable the gas supply to be cut be provided by the Principal Contractor on
off quickly in the case of an emergency. project handover.
They should not be located at the “back” of
ovens where access is difficult. The handles
should be yellow ochre in colour.
• All pipework shall be suitably primed and
painted yellow ochre.

• Note that the position and number of the
gas connections will vary between different
oven manufacturers.
• The Gas Safe registered (commercial
classification) engineer MUST check if they
are unsure which is required. No claims for
subsequent alteration will be accepted.

4.4.1 Gas Installation 3 September 2018