16
INSTALLATION
Mexico Super CF445 - CF475 -
Installation & Servicing
16 ELECTRICAL CONNECTIONS
17 INTERNAL WIRING
18 EXTERNAL CONTROLS
External wiring must be in accordance with the current
I.E.E. (BS 7671) Wiring Regulations. Fore Ireland
reference should be made to the current ETCI rules for
electrical installations.
The wiring diagrams illustrated in Frames 20-22 cover
the systems most likely to be fitted to this appliance.
For wiring external controls to the
Mexico Super CF
boiler
reference should be made to the system wiring diagrams
supplied by the relevant manufacturer, in conjunction with
this flow wiring diagram and Frame 23.
Difficulty in wiring should not arise, providing the following
directions are observed:
1.
Controls that switch the system on and off, e.g. a time
switch, MUST be wired, in series, in the live mains
lead to the boiler.
2.
Controls that override an on/off control, e.g. a frost
thermostat, MUST be wired into the mains lead, in
parallel, with the control(s) to be overridden. Refer to
Frame 23.
3.
If a proprietary system is used, follow the instructions
supplied by the manufacturer.
Advice on required modifications to the wiring may be
obtained from the component manufacturers.
Note.
If there are no external controls the circulating pump
MUST be wired into the control box.
WARNING.
The appliance MUST be efficiently earthed.
A mains supply of 230 V ~ 50 Hz fused at 3A is required.
All external controls and wiring MUST be suitable for mains
voltage.
Wiring should be in 3-core PVC insulated cable NOT LESS than
0.75 mm
2
(24 x 0.2 mm) to BS.6500, Table 16.
Wiring external to the boiler MUST be in accordance with current
l.E.E. (BS 7671) Wiring Regulations and local regulations. For
Ireland reference should be made to the current ETCI rules for
electrical installations.
Connection must be made in a way that allows complete
isolation of the electrical supply - such as a double pole
switch, having a 3mm (1/8") contact separation in both
poles, or a plug and socket serving only the boiler and
system controls.
The means of isolation must be accessible to the user after
installation (except in the case of bathroom installations for
domestic boilers where the point of connection to the mains
MUST be outside of the bathroom).
Flow and pictorial wiring diagrams are
shown in Frames 18 and 19.
1.
Remove the securing screw and lift
off the control box cover.
2.
Route the electrical leads into the
box and wire into the terminal strip,
as shown.
Notes.
a.
Secure each lead with one of the
cable clamps.
b.
The mains lead connection MUST be
made so that, should the lead slip
from its anchorage, the current
conductors become taut before the
earthing conductor.
MEX 2129
TTB
MEX 2130
From systems controls
Boiler thermostat
Gas valve
PCB
Flow wiring diagram
LEGEND
b
blue
bk
black
br
brown
w
white
y/g
yellow/green
INST
ALLA
TION
200943-1.p65
3/4/2004, 1:58 PM
16
