TW10i
4
ELECTRICAL REQUIREMENTS
WARNING
THIS APPLIANCE MUST BE EARTHED
In the UK, the installation, supply cable and
circuit protection must conform with IEE
wiring regulations and be sufficient for the
amperage required.
The following notes are for guidance only:
1 The heater must only be connected to a
230-240V ac supply. If you are installing a heater
with a kilowatt rating above 9kW, it is advisable
to contact the local electricity supply company.
1.1 The electrical rating of the heater is shown
on the rating label (fig.4) within the unit.
Fig.5 schematic of installation circuit
2 Before making any sort of electrical
connection within the installation, ensure that no
terminal is live. If in any doubt, switch off the
whole installation at the consumer unit.
3 The heater must be connected to its own
independent electrical circuit. IT MUST NOT be
connected to a ring main, spur, socket outlet,
lighting circuit or cooker circuit.
3.1 The electrical supply must be adequate for
the loading of the unit and existing circuits.
4 Check your consumer unit (main fuse box)
has a main switch rating of 80A or above and that
it has a spare fuse way which will take the fuse or
mcb necessary for the heater (fig.5).
4.1 If your consumer unit has a rating below
80A or if there is no spare fuse way, then the
installation will not be straight forward and may
require a new consumer unit serving the house or
just the heater.
4.2 You will need to contact the local electricity
company. They will check the circuit and carry out
what is necessary.
5 The earth continuity conductor of the
electrical installation must be effectively
connected electrically to all exposed metal parts of
other appliances and services in the room in
which the heater is to be installed, to conform to
current IEE regulations.
Table A
CIRCUIT PROTECTION
unit cartridge
rating mcb fuse
7.0kW 30/32A 30A
7.5kW 32A 35A
8.0kW 40A 35A
8.5kW 40A 45A
9.0kW 40A 45A
9.5kW 40/45A 45A
10.5kW 45A 45A
Fig.4
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