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4.5 Drainage and Piped Services
heater coil circuit.D R A F T
4.5.1 Hot Water
Hot water shall normally be provided by a gas with BS 5546: 2010 Specification for
fired, room sealed, instantaneous, condensing Installation and maintenance of Gas-fired
multi-point combi water heater, ( Worcester water-heating appliances of rated input not
Bosch Greenstar 28i Junior, or equal or better) exceeding 70kW net and manufacturers
located at high level in the position shown instructions.
on the drawing and installed to comply with • The hot water installation shall be carried out
manufacturers and appropriate building in light gauge copper tube Table X and shall
regulations requirements. This boiler series MUST be designed and installed in accordance
be used to ensure compliance with Part L2 of with BS 8558: 2011 Specification for Design
Building Regulations. Installation Testing and Maintenance of
• Note that the boiler MUST be installed so that Services Supplying Hot Water for Domestic
a minimum of 600mm clear space is left in Use within Buildings and their Curtilages.
front of it for servicing. This includes ensuring • Pipework shall be concealed as far as
that no shelving or other obstructions possible but not hidden inside stud walls etc.
are subsequently installed to reduce this • Any voids which are used for pipe runs must
clearance. be ventilated.
• The boiler heating circuit will supply a low • Gas pipework which is visible to the
pressure hot water heater coil installed in the customers should be painted white and
fresh air intake duct ( supplied and installed marked at appropriate intervals with yellow
by others). The plumber must connect the “GAS” tape. Other gas pipes should be
hot water supply to the heater coil via a painted yellow ochre.
thermostat and 3-way valve (supplied by • Gas pipework shall terminate with an
others). appropriate sized yellow handle stop-cock,
• The plumber must install isolation valves on adjacent to each appliance, and earth
the flow and return pipework to the heater bonded as required.
coil so that the coil can be isolated in case • All water pipework in unheated areas shall
of a problem. be insulated against frost with insulation of a
• A drain-off point should also be fitted to the suitable thickness.
• The insulation, adhesive, tape and all other
• Any pipework, return loops, or similar, needed installation materials shall be suitable for use
to ensure the safety of the boiler must be in food premises.
installed using appropriate pipework and • All exposed pipework shall be installed with
fittings. sufficient clearance between the pipe
• The gas supply pipe for the boiler should be (or insulation surface) and adjacent walls,
not less than 22mm. pipes, cables, equipment etc. to allow
• The gas supply pipe for the boiler MUST be proper cleaning.
routed so that it is NOT disconnected from • All valves shall be WRC approved,
the gas supply in the event of the solenoid manufactured from non-dezincifiable brass.
valve cutting supplies to the ovens. • A gas installation certificate must be
• The boiler shall be installed in accordance provided on completion.
4.5.1 Hot Water 3 February 2016
