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26
9.0 Installation
© Baxi Heating UK Ltd 2013
Fig. 32
Fig. 33
9.7
Making The Electrical Connections
1. See Section 7.5 for details of the electrical supply. Undo
the securing screws and lift the case front panel off.
2. Disengage the securing tab and hinge the control box
downwards. Undo the terminal block cover securing screw
and remove the cover (Fig. 32).
3. Slacken the gland nut in the left of the boiler lower panel
and pass the mains cable through it. Remove the grommet
adjacent to the gland nut, pierce the diaphragm and insert
the cable from the external control system.
4. Leave sufficient slack in the cables to allow the Control
Box to be hinged fully open. Tighten the gland nut and refit
the grommet.
5. Connect the Earth, Permanent Live and Neutral wires to
the terminal strip.
NOTE:
Both the Permanent Live and Neutral
connections are fused.
6. Refer to the instructions supplied with the external
control(s).
IMPORTANT:
The room thermostat
MUST
be suitable
for 230V switching.
7. Remove the link between terminals 1 & 2. The switched
output from the external control must be connected to
terminal 1. (Fig. 33).
8. Replace the terminal block cover.
9.8
Preliminary Electrical Checks
1. Prior to commissioning the boiler preliminary electrical
system checks should be carried out.
2. These should be performed using a suitable meter, and
include checks for Earth Continuity,
Resistance to Earth, Short Circuit and Polarity.
Control Box
A
l
ways
f
i
t
fast
b
lo
w
2A
fuse
Fused
supp
l
y
3A
230V
~
50Hz
Neutra
l
(b
l
ue)
Earth
(green/ye
llo
w)
Li
ve
(br
o
wn)
1
2
230V
br
b
g/y
b
bk
Terminal Block
Fuses