Installation, Operation & Maintenance Manual
IM-895
14
Maintenance
(refer to safety section)
All heating equipment should be serviced before each heating
season to assure proper operation. The following items may
be required to have a more frequent service schedule based
on the environment in which the unit is installed and how
long the equipment is operated.
Motor Assembly
Check the motor sheave setscrews and the motor slide base
bolts for tightness upon initial start-up and before each
heating season. The motor bearings are pre-lubricated at the factory for initial operation but should be re-lubricated (when
provided with grease fittings) at six (6) month intervals. The recommended lubricants are Shell Oil Company "Dolium R", Chevron
Oil "SRI No. 2" or Texaco "Premium RB" lubricant. When lubricating, consider the following:
1. Clean the grease fitting and then apply the grease with a proper grease gun. Keep grease clean.
2. Use two full strokes for each bearing. Do not over-lubricate.
3. Do not mix petroleum grease with silicone.
4. Lubricate motors at standstill.
Burner
Annually, prior to each heating season, a check should be made of the burner and components. Clean the igniter and flame rod
and examine porcelain for cracks. Perform the following:
1. Inspect the burner carefully, including upstream and downstream sides of mixing plates as well as burner body face. Any
accumulation of scale or foreign material on either side of the mixing plates should be removed with a wire brush.
2. Add fresh di-electric grease (Grainger p/n 23YC40) inside the flame rod boot.
3. Check visually that no holes in the mixing plates are blocked. If any mixing plates are loose or missing fasteners, tighten/
replace as necessary. Always use zinc plated or stainless fasteners.
4. Check burner orifices for carbon build-up and clean. Use a pin vise with a #43 drill bit for Maxon NP-I burner orifices.
DO NOT ENLARGE BURNER ORIFICES – THIS MAY AFFECT PERFORMANCE.
When using a drill bit to clean the burner gas ports, do not
distort or enlarge the ports. Use a pin vise not a power drill.
CAUTION
1. Electric shock hazard. Could cause severe injury or death. Failure to bond the frame of this equipment to the building electrical ground
by use of the grounding terminal provided or other acceptable means may result in electrical shock. Disconnect electric power before
servicing equipment. Service to be performed only by qualified personnel. Make sure power is turned off and locked in the OFF
position.
2. If equipped with the factory installed disconnect switch option, when the switch is in the "OFF" position, supply power remains energized
at the supply power terminal strip and the top of the disconnect switch. When providing service on or near these terminals, building
supply power to the unit should be de-energized.
WARNING
Burner Orifices (Direct Spark Ignition shown)
NOTICE
Service and maintenance procedures should be performed by a
qualified service agency.