Installation Manual

27
Gas and electric supply
Gas supply
The Gas Supply should be checked
at the installation planning stage in
order to establish the availability of
an adequate supply of gas.
A gas meter can only be connected by
the gas supplier or their contractor.
An existing meter and / or pipework
should be of sufficient size to carry
the maximum boiler input plus the
demand of any other installed appliance.
(BS 6891: 1988).
The governor at the meter must give
a constant outlet pressure of 21 mbar
+/- 1mbar when the appliance is
running.
The gas supply line should be purged.
WARNING: Before purging open all
doors and windows, also extinguish any
cigarettes, pipes and any other naked
lights.
The complete installation must be
tested for gas soundness.
Electricity supply
Wiring external to the appliance must be
in accordance with BS 7671 (the current
I.E.E Wiring Regulations) for electrical
installation.
The mains cable must be at least 0.75
mm
2
(24/0.2 mm) PVC insulated to
BS 6500 table 16.
WARNING: THIS APPLIANCE MUST BE
EARTHED. (Failure to provide a
satisfactory earth connection would be
a safety hazard and may also result in
appliance malfunction).
The method of connection to the
mains supply must facilitate complete
electrical isolation of the appliance.
Either a 3A fused three pin plug and
unswitched shuttered socket outlet,
both complying with BS 1363, or a 3A
fused double pole switch having a 3mm
contact separation in both poles and
serving only the boiler (and its external
controls) may be used.
5350 485 GB 08/2007
Vitoden 200-W installation 4/9/07 7:27 pm Page 27