Roberts Gorden HE45UT Servicing Instructions, Tube and Reflector Maintenance, Annual Procedure

SECTION 15: SERVICING INSTRUCTIONS

SECTION 15: SERVICING INSTRUCTIONS

DANGER		WARNING
Electrical Shock Hazard	Explosion Hazard	Burn Hazard	Cut/Pinch Hazard
Disconnect electric	Turn off gas supply to	Allow heater to cool	Wear protective gear
	heater before service.	before service.	during installation,
before service.
			operation and service.
		Tubing may still be hot
More than one			Edges are sharp.
disconnect switch may		after operation.
be required to
disconnect electric from
heater.
Heater must be
connected to a properly
grounded electrical
source.

Failure to follow these instructions can result in death, electric shock, injury or property damage.

IMPORTANT: Never use the heater as a support for ladders or other access equipment. Always test for gas soundness with a suitable detection fluid after completing any servicing or exchange of gas carrying component. On completion of any service/fault finding tasks which require the breaking and remaking of electrical connections, the checks:- A: Earth Continuity, B: Polarity and C: Resistance to Earth must then be repeated.

15.1.3 Tube and Reflector Maintenance

With burner and fan removed, clean the outer surfaces of the tubes using a brush and wipe the inner surface of the reflector with a soft damp cloth - use a household detergent if necessary. Never use abrasive cleaners on the reflectors. Reassemble the burner and fan in reverse order. Carry out the Testing Procedure. See Page 58, Section 14.2.

15.1 Annual Procedure

Carry out the following procedure annually. The preferred time would be immediately before the winter heating period. If very dirty conditions arise, it may be necessary to carry out this procedure more often. If the unit takes in air through an air duct or filter assembly, more frequent service may be necessary.

15.1.1 Burner and Fan Removal

Isolate the heater from the gas and electrical supplies. Remove the fan plug from the burner. Unscrew the securing screws on the burner flange. The burner can now be removed. Take care not to disturb the gasket on the flanged burner tube. Unscrew the securing screw on the fan flange spigot. The fan can now be removed.

15.2 Sealing Gaskets

During annual service, all gaskets, as indicated on Page 68, Section 17, must be inspected for cuts, misalignment or dryness. All round rubber gaskets, sealing the screw holes, must be replaced in three year intervals or earlier as needed. All other gaskets must be replaced every five years or earlier as needed.

Old gaskets must be removed completely before installing the new gasket. When replacing gaskets on screws, ensure that the screws are not over tightened. Deformation of the gasket is an indication of suffcient torque. The control and combustion chamber doors have internal seals, replacements must be attached to the same location.

15.1.2Burner and Fan Removal Maintenance

Remove the fan and burner independently to floor level and clean both items internally using a soft brush and compressed air, if available. Take care not to damage the internal parts of the burner. Check fan impeller for cleanliness and free rotation.

The electrodes are an integral part of the burner. To check spark gap, remove the securing screws on the electrode and withdraw it ensuring the gasket is not damaged. Spark gap on electrode should be approximately 3 mm.

15.3 Component Removal

First, isolate the heater from the gas and electricity supply.

Entry to the burner assembly is gained by removing the six door screws and removing the control chamber door. Entry to the combustion chamber is gained by removing the combustion chamber door.

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