Glow-worm 56/3e Back Boiler - Manual (Page 14)

14 221725B
5 Electrical Wiring
6883
6869
5.1 General
WARNING. This boiler must be earthed.
ISOLATE THE ELECTRICAL SUPPLY BEFORE DOING ANY
WIRING
All of the electrical installation must be correctly earthed and be
in accordance with the current issue of BS7671 and be carried
out by a competent person.
The boiler electrical supply is 230V~ 50Hz, fused at 3A. A
double pole isolating switch, having a minimum contact
separation of 3mm in both poles should be used.
The boiler will only require a permanent live if a fire front with
lights or ignition is to be fitted.
External controls are connected to the live 'L' terminal in the 5
way plug, as an example see diagram 5.1.
Supply cable should be (85 o C) PVC insulated type to the
current issue of BS6500 Table 16, not less than 0.75mm 2 (24/
0.20mm).
NOTE: The supply to the boiler and any remote control must be
through the same isolating switch or plug and socket.
It is preferable to have the boiler electrical supply cable
entering the builder’s opening at the left.
If the cable has to be routed down the left hand side of the
combustion chamber the heat shield assembly supplied in the
fittings pack must be used and the cable routed through the
clips, see diagram 5.2.
Diagram 5.1
6452
Froststat Pipestat
Roomstat Programmer
Pump
Ls
N
E
L
N
E
Double
Pole
Switchspur
5 Way
Plug at
Appliance
Diagram 5.2
Diagram 5.3
HEAT
SHIELD
ASSEMBLY
ELECTRICAL
SUPPLY
CABLE
CABLE
CLIPS (3)
ELECTRICAL
SUPPLY
CABLE
CABLE CLIPS
ELECTRICAL
SUPPLY
CABLE
If right hand access is required fit the three clips from the fittings
pack to the combustion chamber extension and route the cable
down the right hand side of the combustion chamber. Keep the
cable well clear of hot surfaces, see diagram 5.3.
NOTE: The boiler electrical supply cable must not be
routed along the back of the appliance.
The cable must be kept well clear of hot surfaces.
When fitting the back boiler unit do not trap the cable.
5.2 Control Thermostat Phial
Unwind the capillary avoid kinking, make sure that the capillary
is positioned so that it passes through the cut out in the side of
the control box, see diagram 10.3. Route the capillary well clear
of any part of the back boiler which becomes hot. Use the
capillary clips, supplied. Secure the capillary and push the phial
into the pocket, secure the phial with the retaining pin supplied,
see diagram 5.4. Again make sure that the capillary is not
touching the casting.
NOTE: When fitting the phial into the phial pocket use the heat
sink compound supplied in the fittings pack.