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4 Electrical connection

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

I.E.E. 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

complying with BS 6500:1990.

Note SL heaters require an electrical cable

between the burner unit and the fan

assembly. This to be provided by the

installing/electrical contractor.

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 that 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.

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 a fused double pole isolator having a

contact separation of at least 3mm in all

Figure 2 Typical wiring connections

U Tube Heater

SL Heater

Fan plugs into burner via plug/socket supplied by Ambi-Rad (Extension cable by others)

DL Heater

Socket not used on DL burner

(no interconnect)

Fused Spur

For more comprehensive control arrangements see black bulb and control panel leaflets.

Figure 3 Internal wiring diagram (AR Burner)

poles and supplying the appliance only.

Alternatively, connection may be made

via a fused three pin plug and unswitched

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

switch.

Fused Spur

Fan Plugs into burner

Fused Spur