3
Figure 2 Typical external wiring
Figure 3 Internal wiring diagram
This appliance must be earthed.
Supply 230V 50Hz single phase.
Current rating 0.55 amp max (inductive).
Fuse: external 3 amp.
All electrical work should be carried out to
IEE standards by a competent electrician.
The electrical connection to the heater is
made by means of a three pin plug-in
power connector. Live, neutral and earth
connections should be made via a flexible
supply cable to the power connector and
routed clear of the heater or tubes. The
flexible supply cables should be of 0.5mm
2
complying with BS 6500:1990.
Wiring
The wires in the mains lead are coloured in
accordance with the following code:
Green & Yellow
Earth
Blue
Neutral
Brown
Live
Instructions for connecting mains lead to
plug:
Connect green and yellow to plug terminal
marked E. Connect blue wire to terminal
marked N. Connect brown wire to terminal
marked L.
It is recommended the electrical circuit
controlling the heater or group of heaters
incorporates thermostats, a time switch and
if required manual control switches and a
frost thermostat.
Note For more comprehensive control arrangements see black bulb and control panel
leaflets
Circuits and controls
All such controls and switchgear must be
rated to handle the total inductive load of
the circuit they control. Load per Ambi-Rad
heater is 0.55 amp. For large installations,
the use of relays and contactors should be
considered. The method of connection to
the electrical supply must facilitate
complete isolation and should be made via
fused double pole isolator having a contact
separation of at least 3mm in all poles and
supplying the appliance only.
Alternatively, connection may be made via a
fused three pin plug and un-switched
shuttered socket, both complying with the
requirements of BS 1361:1971 (1986).
Ensure that a copy of the lighting
instructions plate is affixed adjacent to the
electricity supply switch. Should this switch
serve more than one heater it is only
necessary to affix one copy per service.
Thermostats and other controls
For details on the use and siting of
thermostats (if used) refer to Ambi-Rad
leaflets Doc Ref GB/CON/002/0902.
4 Electrical connection
!
!
!
EMCFIL
TER
BURNER
ON
GREEN/YELLOW
MAINJ.S.T
.
YELLOW
GREY
WHITE
BLUE
RED
RED
RED
BROWN
LAMPS
MAINS
ON
YELLOW
WHITE
GREY
1
1
V
.J.S.T
.
2
2
3
3
BLUE
RED
RESISTOR
7
9
1
1
10
12
IGNITER
FLAMESENSOR
GREY
1
BROWN
3
2
4
8
BROWN
BLUE
GREEN/YELLOW
PINK
MAINSINPUT
BLUE
L
GREEN/YELLOW
BLUE
N
YELLOW
SOLENOIDV
AL
VE
V
ACUUMSWITCH
N.O.
C.
N.C.
L/H
GREEN/YELLOW
R/H
F
AN
N
L
