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GHND-SVX01A-EN • High Efficiency Propeller Fan Gas Unit Heater 35
Maintenance
3. To clean or replace the main burners, remove the bottom panel and compress the
spring by moving the burner toward the manifold. Slide the opposite end of the
burner downward from the locating slot while retaining spring is still compressed.
Pull the burners away from the heat.
4. With the burners removed, wire brush the inside surfaces of the heat exchanger.
5. Remove any dirt, dust, or other foreign matter from the burners using a wire brush
and/or compressed air. Ensure that all parts are unobstructed. Inspect and clean
pilot burner if necessary.
6. Reassemble the gas unit heater by replacing all parts in reverse order.
7. Complete the appropriate unit start-up procedure as given in the “Operation”
section of this manual (see lighting instruction plate on the unit).
8. Check the burner adjustment. See the “Primary Air Shutter Adjustment” section of
this manual.
9. Check all gas control valves and pipe connections for leaks.
10. Check the operation of the automatic gas valve by lowering the setting of the
thermostat, stopping the operation of the gas unit heater. The gas valve should
close tightly, completely extinguishing the flame on the main burners.
11. Inspect and service the motor/fan assemblies. To maintain efficient air flow, inspect
and clean the fan blades and guard to prevent buildup of foreign matter.
12. Check lubrication instructions on the motor. If oiling is required, add 3 to 4 drops of
electric motor oil as follows:
a. Light Duty - After 3 years or 25,000 hours of operation.
b. Average Duty - Annually after 3 years or 8,000 hours of operation.
c. Heavy Duty - Annually after 1 year or at least every 1500 hours of operation.
ƽ CAUTION
Bearing Failure!
Do not mix greases with different bases within the bearing. Mixing grease within the bearing
may result in premature bearing failure.
13. Check and test the operational functions of all safety devices supplied with your
unit.