Supplied By www.heating spares.co Tel. 0161 620 6677
20
221504A
8 Gas Connection
Diagram 8.1
GAS VALVE
(cover removed for clarity)
GAS SERVICE
COCK (shown on )
Make the gas connection, refer to diagram 8.1.
9 Electrical Connection
Diagram 9.1
CABLE RETAINING CLIPS
SELF ADHESIVE
BACKED CABLE
CLIPS
9.1 Electrical Connection
WARNING. This boiler must be earthed.
Take the two plastic cable retaining clips, from the loose items
pack, peel off the backing paper and position them as shown in
diagram 9.1.
Remove the control box by supporting it and removing the fixing
screw, lower slightly and pull forward to disengage, support the
box on the lip bracket at the front, see diagram 9.2.
Take care not to damage any internal wiring and capillaries.
Using heat resistant (85
o
C) PVC insulated cable of at least
0.75mm
2
(24/0.2mm) to the current issue of BS6500 Table 16,
and of a suitable length, thread the cable through the cable
clamp secure into the plastic clips and connect to the appropriate
terminals, see diagram 9.3 and 13.5.
Standard colours are, brown - live, blue - neutral and Green and
Yellow - earth.
The mains cable outer insulation must not be cut back external
to the cable clamp, see diagram 9.3.
When making connections, make sure that the earth conductor
is made of greater length than the current carrying conductors,
so that if the cable is strained the earth conductor would be the
last to become disconnected.
CAUTION. It
is essential that the polarity is correct.
9.2 Pump Connection
The pump must be connected directly to the control box, as
shown in diagram 9.3 and 13.5 threading the cable through the
cable clamp in the side of the control box.
9.3 External Controls
Remove the red link between 9 and SL in the control box when
using any external controls.
Always make sure that all cables are secured and clear of hot
surfaces.
3301
3555
9.3 Testing - Electrical
Checks to ensure electrical safety should be carried out by a
competent person.
After installation of the system, preliminary electrical system
checks as below should be carried out:
1. Test insulation resistance to earth of mains cables.
2. Test the earth continuity and short circuit of all
cables.
3. Test the polarity of the mains.
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