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10.8
Gas Connection
Warning, this appliance must be earthed.
External wiring must be correctly earthed, polarised and in
accordance with relevant regulations / rules. In GB this is the
current I.E.E. WIRING REGULATIONS. In IE reference should be
made to the current edition of the ETCI rules. This boiler is supplied
for connection to a 220 - 240 V~ 50 Hz supply.
The supply must be fused at 3 A.
The method of connection to the electricity supply must facilitate
complete electrical isolation of the appliance, by the use of a fused
double pole isolator having a contact separation of at least 3 mm in
all poles or alternatively, by
means of a 3 A
fused three pin plug
and unswitched shuttered socket outlet both complying with BS
1363.
The point of connection to the Electricity supply must be readily
accessible and adjacent to the appliance unless the appliance is
installed in a bathroom when this must be sited outside the
bathroom.
The local gas region contractor connects the gas meter to the
service pipe.
The gas installation should be in accordance with the relevant
standards. In GB this is BS6891 and in IE this is the current edition
of I.S.813.
The connection the the appliance is a 22 mm copper tail located at
the rear of the gas service cock (Fig. 10.2).
If the gas supply for the boiler serves other appliances ensure that
an adequate supply is available both to the boiler and the other
appliances when they are in use at the same time.
Pipe work must be of an adequate size. Pipes of a smaller size than
the boiler inlet connection should not be used.
Central Heating
Detailed recommendations are given in BS 6798:1987 and BS
5449-1:1990, the following notes are given for general
guidance.
Pipe Work:
Copper tubing to BS EN 1057:1996 is recommended for water
pipes. Jointing should be either with capillary soldered or
compression fittings.
Where possible pipes should have a gradient to ensure air is
carried naturally to air release points and water flows naturally
to drain taps.
The appliance has a built-in automatic air release valve,
however it should be ensured as far as possible that the
appliance heat exchanger is not a natural collecting point for air.
Except where providing useful heat, pipes should be insulated
to prevent heat loss and avoid freezing.
Particular attention should be paid to pipes passing through
ventilated spaces in roofs and under floors.
By-pass:
The appliance includes an automatic by-pass valve, which
protects the main heat exchanger in case of reduced or
interrupted water circulation through the heating system, due to
the closing of thermostatic valves or cock-type valves within the
system.
10.9
Water Connections
