7. Maintenance Instructions
Page
15
of
28
Every Use
•
Generally inspect the equipment for external damage or signs of deterioration.
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Ensure that the product is clear of obstruction and that the airflow remains
unrestricted.
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Check the fan guards, impeller and heating elements for any residual dust build up.
Anything noted must be removed with a damp cloth.
•
Check the impeller blades for signs of damage, and that there is at least 2mm of
clearance to the casing and the guard. Any damage should be reported to EXHEAT
Industrial Ltd and the heater taken out of service.
•
Check the casing for any signs of contact from the impeller. Any scuffs or marks
made by the impeller should be reported to EXHEAT Industrial Ltd and the heater
taken out of service.
Six-monthly Maintenance Inspections
The following should be undertaken every six months in addition to the maintenance
inspections above:
Do not remove the terminal enclosure cover during wet or humid conditions as
this could lead to a reduction in insulation resistance of the thermostat.
•
Ensure the 5mm grub screws that affix the impeller to the motor are tight.
•
Remove the fan guard and ensure the blades rotate unimpeded and that there
remains a gap of at least 2mm all the way around.
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Isolate the electrical supply and remove the cover as per section 5.
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Internals should be clean, dry and free from debris, clean using a damp cloth.
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Ensure that electrical terminations are undamaged and secure.
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Measure the overall insulation resistance of the heater. Use a 500V dc Insulation
Resistance Tester to take a reading between the earth and the phase terminals. The
reading should be better than 2 megohm. If it is not, refer to section 4.
•
Ensure that the gasket is in good condition and replace if required. Carefully refit the
covers using only the fixings provided, as per section 5.
•
Earth continuity must be maintained between all earth points and the main structure,
ensure that any earth conductors are correctly and securely fitted between all earth
points and main structure.
