Electrical - Worcester 12/14 Installation And Servicing Instructions

10. Electrical

(See Figs. 14 to 19).
10.1 The wiring between the appliance and the electrical supply
shall comply with current IEE wiring regulations (and any local
regulations which apply) for fixed wiring to a stationary appliance.
NOTE: It must be possible to completely isolate the appliance.
10.2 To gain access to the electrical terminal strip.
1. Isolate the mains electrical supply.
2. Remove the cabinet top panel by snatching squarely
upwards.
3. Release the four screws securing the cover of the
electrical control box and remove.
10.3 Mains Wiring
MAINS SUPPLY – 230V AC ~ 50HZ 5A External Fuse to BS1362.
LIVE - Brown, NEUTRAL - Blue, EARTH - Green/Yellow
Mains Cable: 0.75mm (24 x 0.20 mm) to BS6500 Table 16.
The supply to the boiler must be the only electrical supply to the
system. This ensures the safety of a single fused supply.
The mains supply cable should be connected into the terminals
marked L (Live), N (Neutral) and E (Earth) on the appliance
Fig. 14. Wiring Diagram (Standard).
Mains supply 230/240V 50Hz
Earth
Stud
Green/Yellow
High limit Manual reset
thermostat thermostat
Orange
Brown
Brown
Green/Yellow
E
Blue
N
Brown
L
Fan motor
E N L
Blue
L N E E N 1 2 3 4 5 6
Brown
Blue
Green/Yellow
Brown
Black
Mains on
(1)
neon
(C)
Control
Lockout
thermostat
neon
Burner Control
1 2 3 4 5 6
Plug in connector
1 2 3 4 5 6 7 8 9
N
E
Satronic control box
terminal strip and securely held in the cable clamp located in the
left-hand side of the electrical tray box. To secure the cable,
remove the clamp retaining screw and pull its inner body out to
allow the cable to be fed through. With the cable in position refit
the screw and fully tighten to grip the cable. Feed the cable
between the side panel and the boiler insulation jacket and route
to the connection point avoiding any hot surfaces.
The appliance must be earthed.
10.4 Programmer
(See Fig. 16a).
A plug in, colour co-ordinated, 2 channel electronic programmer
is available from Worcester Heat Systems Limited. Full
instructions covering installation and operation of the
programmer are included with the kit.
The programmer will give fully independent central heating (CH)
and hot water (HW) programmes when the switch on the rear of
the unit is set to P.
If an external programmer is to be fitted to the boiler the link plug
should be removed from the programmer terminal strip. (See Fig.
16b). The LIVE, NEUTRAL and EARTH wires should be connected to
the LIVE, NEUTRAL and EARTH terminals on the main terminal strip
and the switched lines connected to terminals 1 and 2.
Brown
Brown
Blue
Green/Yellow
Blue
White
Grey
Time clock
white
connecter
Brown
Blue
Green/Yellow
Red
Grey
Black
Plug in
1 2 3 4 5 6
connector
Brown
Blue
Green/Yellow
Pump
15
11 12 13 14 15
7 8 9 10
Green/Yellow
Pink
Yellow
Brown White
Grey
Brown
White
Operating Switch
Post Purge Unit.
For use on open flue low
level discharge models
only. (Not RS models) Unit
supplied in Flue Kit.
Post purge
black
connecter