25
EVOMAX
-
Installation & Servicing
InStALLAtIon
In
S
t
ALLA
t
Ion
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 45-48 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 34.
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 32.
33 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
•
outside temperature sensor
DHW demand can be controlled by:
•
230V programmer and/or cylinder thermostat
• tank sensor kit
The electrical supply and their inputs onto the boiler can be
seen in Frame 34.
4.
An optional outside temperature sensor may be fitted for
outside weather compensation. See Frame 34 for connection
details.
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 4A.
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
32 ELECtRICAL ConnECtIonS
switch, 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.
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