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Sales/Spares & Replacement Help Line 01604 762881
10. ELECTRICAL
WARNING: THIS APPLIANCE MUST BE EARTHED!
10.1 MAINS SUPPLY
a.
The heater is supplied with mains cable (PVC sheathed, heat resisting to 85°C), 3 core: Brown; Blue;
Green/Yellow, 6A, 0.75mm
2
), connected to a terminal block and exiting through the heater at the right
hand top. The cable is suitable for a 230V 50Hz supply and requires connection to the fixed wiring using
a double pole switched, fused spur with a contact separation of at least 3mm in ALL poles. The fuse
fitted must be rated 5A to BS 1362. Connections must also be in accordance with the current edition
of I.E.E Regulations BS 7671.
NOTE: If, for any reason, the heater is re-wired, then
3 core cable
that meets the above specification
MUST be used. Under NO circumstances, should 5 core cable be used for the combined purpose of
supplying power to the heater and connecting the thermista-stat!
b.
Fan delay and overheat (limit controls) are not adjustable and are factory set so that the limit switch
opens at 93°C and closes at 76°C.
c.
An electronic controller (thermista-stat) is supplied which acts like a room thermostat.
10.2 THERMISTA-STAT & IT’S LOCATION
a.
The thermista-stat should be located where there is free air circulation and positioned approx. 1.5m
(5ft) from the floor.
b.
Avoid the following locations:
i. In a room where temperature is greatly affected by the sun or any other heat source, e.g. radiant
fire, wall light fittings or TV set.
ii. Near an outside door or windows, or on an outside wall.
iii. Where it will be affected by warm air ducts, diffusers, waste pipes or the heater itself.
iv. Where it will be subjected to vibration.
c.
Connect the thermista-stat wires to terminals ‘8’ and ‘9’ on the terminal block (see Figures 17 & 18).
11. GAS (See BS 5864 and BS 6891)
11.1.1 The local gas supply conditions MUST be adequate for the specified burner pressures as stated
in the technical specification (paragraph. 1.3)
11.1.2 An independent gas supply pipe from the meter is to be preferred wherever possible. Where this
is not possible, the pipe must be capable of taking the complete input of the heater and all other
gas appliances being served by the same pipe. This supply should be suitably sized to conform
to British Standards requirements of no more than 1.0 mbar (0.4” wg) pressure drop (See table of
discharge in BS 6891).
11.1.3 The ½” union gas cock (supplied) MUST be fitted to the gas inlet of the heater for easy isolation
during servicing. The gas pipe should be fitted and installed so as to be durable, substantial and
gas tight. To assist in determining where a gas connection may not be tight, a leak detection fluid
should be applied around the connection. Under no circumstances should a flame be used to
locate a gas leak. Gas entry to the air heater is through either side to a to a Rp ½ (½” BSP. internal
[parallel] thread).
12.
FITTING INSTRUCTIONS
CAUTION: This appliance exceeds the recommended weight for a one man lift as detailed in the Manual
Handling Operations, 1992 Regulations.
It should be noted that this appliance could contain sharp edges and care MUST be taken when handling.
12.1
FITTING THE APPLIANCE
12.1.1 Making sure the plenum is clear from all debris, lift the appliance into place.
12.1.2 Using a spirit level it is important the appliance is completely level, this appliance MUST NOT lean
or tilt in any direction. This will cause problems with the condense draining.
12.1.3 Seal the unit to the plenum, using ducting tape (not supplied). Ensure a good seal is made.
12.1.4 Fix all connections to the appliance ready for commissioning.
