Glow-worm BBU 54/4 - Manual (Page 14)

14 2000225024C
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 does not require a permanent live. External controls
are connected to the live 'L' terminal in the 3 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, see diagram 5.2. Keep the cable
well clear of hot surfaces.
If right hand access is required and the boiler electrical supply
cable has to be routed down the right hand side of the combustion
chamber keep the cable well clear of hot surfaces. The cable
must also be routed in front of the gas control valve, see diagram
5.3.
Note: If the fire front to be fitted to the back boiler unit is, a Firelite
4, Contour 4, Miami 4, Heartbeat 4, or Black Beauty 4, the mains
cable, if it is routed from the right, will have to be secured in a
retaining clip on the combustion chamber extension. Fitting
instructions for the combustion chamber extension are given in
the Use, Installation and Servicing instructions of the above fire
fronts.
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 Thermistor Phial
Route the cable well clear of any part of the back boiler which
becomes hot. Push the phial into the pocket and secure with
retaining wire, from fittings pack, see diagram 5.4. Again make
sure that the cable is not touching the casing.
5.3 Boiler Control Box
Taking care that the POWER IS OFF, wire the incoming mains
cable to the mains plug supplied in the fittings pack. Do not
connect the mains supply plug to the control box socket, see
diagram 5.5.
5.4 Boiler User Control lead fitting,
Chatsworth 4 and Dovedale 4 only.
Before the fire front is positioned the boiler user control will need
to be fitted to the control box.
Remove the control box lid securing screws, see diagram 5.5.
Remove the control box lid taking care not to damage the
insulation.
Remove the boiler user control and its long connecting lead
from the control box, see diagrams 5.8 and 10.4.
Remove the long connecting lead and bracket from boiler user
control, first unscrewing cable grip to remove support bracket
and then unplug lead. Discard support bracket and long lead,
see diagram 5.6.
5 Electrical Wiring
Diagram 5.3
9636
ELECTRICAL
SUPPLY
CABLE
Diagram 5.1
6452
Froststat Pipestat
Roomstat Programmer
Pump
L
N
E
L
N
E
Double
Pole
Switchspur
3 Way
Plug at
Appliance
(Right hand shown)
Diagram 5.2
11615
ELECTRICAL
SUPPLY CABLE
(Left hand shown)