5 electrical wiring – Glow-worm Inset 40BBU User Manual

Page 13

221722B

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

C) PVC insulated type to the current

issue of BS6500 Table 16, not less than 0.75mm

(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.

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, down the
side and rear of the electrical control box and restrained using
the cable ties supplied in the fittings pack, 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 Electrical Wiring

Diagram 5.2

Diagram 5.3

8062

6355a

SECURING
SCREW (2)

HEAT
SHIELD
ASSEMBLY

CABLE TIE

ELECTRICAL
SUPPLY
CABLE

CABLE
CLIPS (2)

ELECTRICAL
SUPPLY
CABLE

Diagram 5.1

6452

Froststat

Pipestat

Roomstat

Programmer

Pump

Double
Pole
Switchspur

3 Way

Plug at

Appliance