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10 Electrical Connection
WARNING: This appliance must be earthed.
This appliance must be wired in accordance with these instruc-
tions. Any fault arising from incorrect wiring cannot be put right
under the terms of the Glow-worm guarantee.
All system components must be of an approved type.
Electrical components have been tested to meet the equivalent
requirements of the BEAB.
Do not interrupt the mains supply with a time switch or pro-
grammer.
Connection of the whole electrical system and any heating sys-
tem controls to the electrical supply must be through a com-
mon isolator.
Isolation should preferably be by a double pole switched fused
spur box having a minimum contact separation of 3mm on
each pole. The fused spur box should be readily accessible
and preferably adjacent to the boiler. It should be identifi ed as
to its use.
A fused three pin plug and shuttered socket outlet may be used
instead of a fused spur box provided that:
a) They are not used in a room containing a fi xed bath or show-
er.
b) Both the plug and socket comply with the current issue of
BS1363.
10.1 System Controls
WARNING: UNDER NO CIRCUMSTANCES MUST ANY MAINS
VOLTAGE BE APPLIED TO THE CONNECTION LEAD.
Connect the mains supply and system heating controls e.g.
room thermostat as diagram 10.1. External controls should be
fi tted in accordance with the rules in force.
IMPORTANT NOTE
ALL electrical connections to the boiler
must be permanently fi xed to a wall or a
sturdy support feature in a tidy manner.
10.2 Mains Voltage System Controls
WARNING: The Betacom is designed exclusively for use with
potential free system controls. Under no circumstances must
any mains voltage be applied to the white controls con-
nection lead.
10.3 Electrical Connections - Testing
Carry out preliminary electrical system checks as below:
1. Test insulation resistance to earth of mains cables.
2. Test the earth continuity and short circuit of cables.
3. Test the polarity of the mains.
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