Page 80 - B8773-AEW-XX-XX-PP-A-0001_[P1]_Contractors Manual
P. 80
4.5 Drainage and Piped Services
4.5.1 Hot Water • The boiler shall be installed in accordance
with BS 5546 Specification for Installation
Hot water shall normally be provided by a gas of Gas Hot Water Supplies for Domestic
fired, room sealed, instantaneous, condensing Premises and manufacturers instructions.
multi-point combi water heater, ( Worcester
Bosch Greenstar 28i Junior, or equal or better) • The hot water installation shall be carried out
located at high level in the position shown in light gauge copper tube Table X and shall
on the drawing and installed to comply with be designed and installed in accordance
manufacturers and appropriate building with BS 6700 1997 Specification for Design
regulations requirements. This boiler series MUST Installation Testing and Maintenance of
be used to ensure compliance with Part L2 of Services Supplying Hot Water for Domestic
Building Regulations. Use within Buildings and their Curtilages.
• Note that the boiler MUST be installed so that
• Pipework shall be concealed as far as
a minimum of 600mm clear space is left in possible but not hidden inside stud walls etc.
front of it for servicing. This includes ensuring
that no shelving or other obstructions • Any voids which are used for pipe runs must
are subsequently installed to reduce this be ventilated.
clearance.
• 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
others). • Gas pipework shall terminate with an
• The plumber must install isolation valves on appropriate sized yellow handle stop-cock,
the flow and return pipework to the heater adjacent to each appliance, and earth
coil so that the coil can be isolated in case bonded as required.
of a problem.
• A drain-off point should also be fitted to the • All water pipework in unheated areas shall
heater coil circuit. be insulated against frost with insulation of a
• Any pipework, return loops, or similar, needed suitable thickness.
to ensure the safety of the boiler must be
installed using appropriate pipework and • The insulation, adhesive, tape and all other
fittings.. installation materials shall be suitable for use
• The gas supply pipe for the boiler should be in food premises.
not less than 22mm.
• The gas supply pipe for the boiler MUST be • All exposed pipework shall be installed with
routed so that it is NOT disconnected from sufficient clearance between the pipe
the gas supply in the event of the solenoid (or insulation surface) and adjacent walls,
valve cutting supplies to the ovens. pipes, cables, equipment etc. to allow
proper cleaning.
• All valves shall be WRC approved,
manufactured from non-dezincifiable brass.
• A gas installation certificate must be
provided on completion.
4.5.1 Hot Water 3 February 2016
