Roberts Gorden HE15UT Manual Do Utilizador

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SECTION 15: S
ERVICING
 I
NSTRUCTIONS
59 of 73
SECTION 15: SERVICING INSTRUCTIONS
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 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.
15.1.2 Burner 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.
15.1.3 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
.
15.2 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.
15.3 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.
Cut/Pinch Hazard
Wear protective gear 
during installation, 
operation and service.
Edges are sharp.
WARNING
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Burn Hazard
Allow heater to cool 
before service.
Tubing may still be hot 
after operation.
Explosion Hazard
Turn off gas supply to 
heater before service.
DANGER
Electrical Shock Hazard
Disconnect electric 
before service.
More than one 
disconnect switch may 
be required to 
disconnect electric from 
heater.
 
Heater must be 
connected to a properly 
grounded electrical 
source.