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Fig. 3.8
MINIMUM CLEARANCES
3.5.6 The position must allow for correct termination of the
flue system (see Section 3.4).
3.5.6 The combination boiler may be installed in any room
or internal space, although particular attention is drawn to
the requirements of the current I.E.E. Wiring Regulations,
and in Scotland, the electrical provisions of the Building
Regulations applicable in Scotland, with respect to the
installation of the combination boiler in a room or internal
space containing a bath or shower.
Where a room-sealed appliance is installed in a room
containing a bath or shower, any electrical switch or
appliance control utilising mains electricity should be so
situated that it cannot be touched by a person using the
bath or shower.
3.6 ELECTRICAL
3.6.1
Electrical connections and installation must
conform to current IEE Regulations and. in Scotland, the
electrical provisions of the Building Regulations.
The appliance must be earthed.
Wiring external to the appliance MUST be carried out by a
competent person in accordance with the current IEE
Regulations and Local Regulations which apply. The
Thermornatic Combination Boiler is supplied for
connection to a 240V-50Hz single phase. The appliance is
fused at 3A
3.6.2
The method of connection to the electricity supply
MUST provide means of completely isolating the electricity
supply to the boiler and its ancillary control, preferably by
using a 3A fused three-pin plug and unswitched shuttered
socket outlet both complying with the requirements of 8S.1
363. or alternately a 3A fused double-pole switch having n
3 mm contact separation on both poles.
A flexible three-core PVC insulated cable must be
used between the isolator and terminal block with a
minimum cable size of 0.75 mm1 (24 x 0.2 mm)
BS.6500 Table 16
Ensure all cables are secure.
3.6.3 ELECTRICITY SUPPLY
WARNING: THIS APPLIANCE MUST BE EARTHED.
Connection shall be made to a 240 Volts 50 Hz -
supply. K a mains plug connection is used it must be
of a three-pin type and fused to 3 Amps.
To connect a plug
As the colour of the wires in the mains lead of (he
appliance may not correspond with the coloured
markings identifying the terminals in your plug, proceed
as follows:—
The wire which is coloured green-and-yellow must be
connected to the terminal in the plug which is marked
with the letter E or by the earth symbol or coloured
green or green-and-yellow.
The wire which is coloured blue must be connected to
the terminal which is marked with the tetler:N or
coloured black.
The wire which is coloured brown must be connected to
the terminal which is marked with the letter L or
coloured red.
ELECTRICAL CONNECTIONS
3.6.4 To gain access to the terminal block remove me
four screws fixing (he base panel with the attached front
door and remove the panel (see Fig. 3.10, item 9'1
3.6.5Thread the main supply cable through the cable
restraining clamp, leave enough cable for removal of
control panel to replace any boiler controls.
3.6.6 Ensure earth wire is longer than current carrying
conductors so that if cables are strained or slip in their
anchorage, the current carrying conductors become taut
before the earth wire.
Page 11
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