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3.5 Air supply
Detailed recommendations for air
supply are given in BS 5440: Part 2.
It is not necessary to have an air vent
in the room or internal space in which
the boiler is installed.
3.5.1 Cupboard or compartment air
supply
TURBOmax Room Sealed Combination
Boilers are very high efficiency
appliances.
As a consequence the heat loss from
the appliance casing during operation
is very low. For cupboard and
compartment installations it is therefore
not necessary to provide any high or
low level permanent air vents for
cooling purposes.
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3.6 Electricity supply
A 230 V~ 50Hz single phase
electricity supply fused to 3 amps must
be provided in accordance with the
latest edition of BS7671 (I.E.E. Wiring
Regulations) and any other local
regulations that may apply.
THIS APPLIANCE MUST BE EARTHED.
The method of connection to the mains
electricity supply must provide a
means of completely isolating the
boiler and its ancillary controls.
Isolation is preferably by the use of a
fused three pin plug and unswitched
shuttered socket outlet, both complying
with the requirements of BS 1363.
Alternatively, a 3 Amp fused
double-pole switch with a 3mm
contact separation on both poles may
be used.
3.7 Guide to system
requirements
3.7.1 Water circulation system
Detailed recommendations for the
water circulation system are given in
BS 6798 and BS 5449: Part 1 (for
small bore and micro bore central
heating systems).
Pipework not forming part of the useful
heating surface should be insulated to
help prevent heat loss and possible
freezing, particularly where pipes are
run through roof spaces and ventilated
underfloor spaces.
Draining taps must be located in
accessible positions which permit the
draining of the whole system including
the boiler and the hot water system.
Draining taps should be at least 1/2
in. BSP nominal size and be in
accordance with BS 2879.
The boiler is suitable for use with
minibore or microbore systems.
Copper tubing to BS 2871: Part 1
should be used for water carrying
pipework. All capillary joints in the
DHW pipework must be made with
lead free solder.
Particularly where a new boiler is to
be fitted to an existing system, it is
good practice that the system is
thoroughly cleansed. This cleasing
should take place prior to the fitting of
the new boiler and be in accordance
with BS 7593.
For advice on the application of
system cleansers contact Sentinel,
Grace Dearborn Ltd, Widnes,
Cheshire, WA8 8UD.
Tel: 0151 4951861.
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