Drill two holes 3 mm diameter
through the air duct clamp (2. Fig 24)
ensuring that the drill does not pene-
trate the flue duct. Screw the clamp to
the boiler half ring using the self tap-
ping screws provided.
Note: The air duct clamp must not be
screwed to the bottom of the air flue
duct and terminal assembly. The
air/flue duct and terminal assembly
must be able to slide in the air duct
clamp to absorb any slight
movements in the roof structure.
4.7 Electrical installation
4.7.1 General electrical requirements
All electrical work shall be carried out
by a competent person and shall
comply with BS7671 (IEE
Regulations).
The boiler is supplied for connection
to a 230V~ 50Hz supply fused at 3A
rating. Connection to the mains supply
should be made via a fused 3 pin
plug to an unswitched, shuttered
socket, both complying with the
requirements of BS1363. (Alternatively,
connection may be made via a 3
Amp fused double pole isolator
having a contact separation of at least
3mm in all poles and supplying the
boiler and controls only).
The point of connection to the mains
must allow complete electrical isolation
of the boiler and its ancillary controls.
It should be readily accessible and
adjacent to the boiler. A 3 core
flexible cord according to BS6500
tables 6, 8 or 16 (3x0.75 to 3x1.5
mm
2
) should be used.
Warning: This appliance must be
earthed
4.7.2 Connecting to mains supply
Slacken front panel fixing screw (1,
fig. 25) and lower front panel. Remove
terminal box cover by undoing screw
(1, fig. 26)
Connect the power supply cord as
follows (see fig. 27):-
green / yellow (earth) wire....
boiler terminal
Blue (neutral) wire..... boiler terminal N
Brown (live) wire..... boiler terminal L
Note: Do not use boiler terminal
connections 7-8-9
19
1
2
fig. 25
GW 603/1
1 3
2
fig. 26
GW 614/1
N
L
3
4
5
7
8
9
1
2
fig. 27
GW 1528/0GB
1
fig. 28
GW 1527/0
IMPORTANT Ensure that all cords
pass through the terminal box entrance
grommets and are securely fixed by
the cable clamps. Ensure that the
power supply cord is connected such
that the current carrying conductors
become taut before the earthing
conductor should the supply cord slip
from the cable clamp.
Refit the terminal box cover after
completion of all electrical components.
The cable clamp (1, fig. 28) is only
meant as a mounting aid. A possible
damage caused when mounting or
removing it will not cause any
malfunction of the appliance.
