IDEAL imax W45, Installation And Servicing Manual

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23 -
Installation & Servicing
INSTALLATION
Warning. This appliance MUST be efficiently earthed.
A mains supply of 230V 50Hz is required. The supply wiring
MUST be suitable for mains voltage. Wiring should be 3 core
PVC insulated cable NOT LESS than 0.75mm
2
(24 x 0.2 mm)
and to BS. 6500, Table 16. The fuse rating should be 3A.
Wiring external to the boiler MUST be in accordance with the
current I.E.E. (BS7671) Wiring Regulations and any local
regulations. For Ireland reference should be made to the
current ETCI rules for electrical installations.
Connection should be made in a way that allows complete
isolation of the electrical supply - such as a double pole switch,
31 ELECTRICAL CONNECTIONS
having a 3mm (1/8") contact separation in both poles, or a
plug and unswitched socket serving only the boiler and
system controls. The means of isolation must be accessible
to the user after installation.
When making mains electrical connections to the boiler it is
important that the wires are prepared in such a way that the
earth conductor is longer than the current carrying
conductors, such that if the cord anchorage should slip the
current carrying conductors become taut before the earthing
conductor.
4 self adhesive cable clips are provided to aid routing of the
wiring across the bottom panel of the boiler.
30 GAS CONNECTION
Refer to Frame 1 for details of the position of the gas
connection.
A MINIMUM working gas pressure of 17.5 mbar (7" w.g.) must be
available at the boiler inlet for natural gas and 37mbar for
propane with the boiler firing. Refer to 'Servicing' for details of
the pressure test point position.
Extend a gas supply pipe NOT LESS THAN 22mm O.D. to the
boiler and connect using the gas cock provided.
Note.
If the pipe run from the meter to the boiler is greater than
3m (10') it is recommended that a 28 mm O.D. pipe is used.
IMPORTANT. The gas service cock contains a non-metallic seal
so must not be overheated when making capillary connections.
External wiring MUST be in accordance with the current I.E.E.
(BS7671) Wiring Regulations. For Ireland reference should be
made to the current ETCI rules for electrical installations.
The wiring diagrams illustrated in Frames 48, 49 and 50 cover
the systems most likely to be used with this appliance.
For wiring external controls to the boiler, reference should be
made to the systems wiring diagram supplied by the relevant
manufacturer in conjunction with the connection diagram
shown in Frame 33.
Difficulty in wiring should not arise, providing the following
directions are observed:
1. The appliance must be wired with a permanent live supply.
External controls should NOT be wired in series with this
mains input. Controlling the mains input in this way will
prevent the pump over-run sequence and may cause
damage to the heat exchanger.
2. 230V AC output is provided and must be used for the
system pump and optionally for a DHW pump or valve,
programmer and thermostats. Care must be taken to
ensure that the earth conductor is longer than the current
carrying conductors for reasons given in Frame 31.
32 EXTERNAL WIRING
3. Input terminals are available for connecting a variety of
system controls for heating demand, and optionally for DHW
demand.
Heating demand can be controlled by:
• 230V programmer and/or room thermostat
• programmable room thermostat kit
• Modulating sequencer kit
• a bms (connected via optional board)
• outside temperature sensor
DHW demand can be controlled by:
• 230V programmer and/or cylinder thermostat
• tank sensor kit (this cannot be timer controlled except
when using our programmable room thermostat, which
can block DHW demand during the 'night' period).
The electrical supply and their inputs onto the boiler can be
seen in Frame 33.
4. An optional outside temperature sensor may be fitted for
outside weather compensation. See Frame 33 for
connection details.
INST
ALLA
TION