Operating instructions

1104UESAGBEN, page 16/31

7. ELECTRICAL

SUPPLY AND

CONNECTIONS

DANGER :

THIS APPLIANCE

MUST BE EARTHED.

Electrical supply

The electrical installation must only be carried out in accordance with the IEE regu-

lations and by an appropriately qualiﬁ ed person. The electrical supply line to the

heater should include a main isolating switch. The minimum clearance distance

between the contacts must be more than 3 mm.

All electrical connections should be made in the heater control compartment (re-

fer ﬁ gure ‘Wiring connections’). Screw type terminals are provided. Connections

should be in accordance with the terminal markings and the wiring diagram afﬁ xed

to the air heater.

Attention :

Permanent damage can occur to burner relay when faulty connection of thermo-

stat, reset switch or burner failure lamp.

Switching of wires for reset switch and ﬂ ame failure (e.g. in a remote control box)

will destroy the burner relay.

The minimum external control required for the air heater is a room thermostat. It is

essential that the main input L and N terminals remain live at all times even when

the heater is switched off to ensure correct operation of the unit.

An external burner reset switch with red indicator light is ﬁ tted on the heater. To

add a remote reset button, make connections to the terminals in the electric box as

indicated on the wiring diagram.

IMPORTANT: If the reset button requires activating for any reason, the cause must

be determined. After determining and correcting the problem, restart the heater

and monitor long enough to ensure proper operation (approx. 5 minutes).

An external orange indicator light is ﬁ tted on the heater to signify when the burner

is on.

Ensure that all cables and installers wiring are appropriately ﬁ xed and that they do

not touch the ﬂ ue combustion collector box.

Do not attempt to control more than 1 heater from a single thermostat or control

panel unless a properly wired relay is ﬁ tted. Follow the instructions supplied with

such panels.

The location of the room thermostat or sensor is very important. It should not be

positioned on a cold wall or cold surface. Avoid location in draughty areas or where

it may be inﬂ uenced by heat sources e.g. the sun, process plant, etc. The thermostat

should be mounted on a vibration free surface and mounted about 1,5 metres above

ﬂ oor level. Follow the thermostat manufacturers instructions.

Thermostat location

7.1 Electrical sup-

ply