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