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9.Electrical Connections
9.1 The boiler is supplied factory wired complete with 1.5 m of mains fl y lead. All electrical
connections to the mains supply must be made in full accordance with the current I.E.E. or
other local regulations.
9.2 The boiler must be connected to an effective earth system. Using the cable supplied
the boiler may be connected via a 3 amp fused three pin plug to an unswitched shuttered
socket outlet. However if the boiler is installed in a room containing a bath or shower
regulations dictate that disconnection must be incorporated in the fi xed wiring with a switch
provided for disconnection from the mains supply having a contact separation of at least
3 mm on all poles and fused at 3 amp.
9.3 The point of connection must be readily accessible, at a distance no further than 1.5m
adjacent to the appliance and provide complete electrical isolation for the boiler and control
system.
9.4 The low voltage room thermostat terminal block is located behind the plastic cover on
the left hand side (fi gure 7). On connection of a voltage free room thermostat to the boiler,
the factory fi tted bridge across the room thermostat terminal connectors must be removed.
If a mains voltage thermostat is to be used then please refer to 9.5 below and the electric
wiring diagram in fi gure 8.
9.5 Mains powered thermostats must be connected directly to the mains circuit board as
indicated in Figure 8 where connection of the thermostat is to the terminal block within
the control box. If using this connection the link wire across the terminal block shown
in fi gure 7 must be removed.
9.6 Ensure that the polarity of the mains connection is correct as reversed polarity may
cause the appliance to malfunction.
9.7 While the boiler's main pcb, pump, three-way valve and gas valve are supplied at 230V
a.c., all other components and associated circuits are supplied at low voltage.
13
Figure 7
Warning!:
On no account must any
mains voltage be applied to
any of the terminals on the
heating control connection
plug.
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