Service
WARNING
ELECTRICAL SHOCK, FIRE,
OR EXPLOSION HAZARD.
Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property damage.
Improper servicing could result in dangerous opera- tion, serious injury, death, or property damage. Before servicing, disconnect all electrical power to furnace.
When servicing controls, label all wires prior to dis- connecting. Take care to reconnect wires correctly. Verify proper operation after servicing.
At the beginning of each heating season, a qualified techni- cian should check the system as follows:
Blower
Check the blower wheel for debris and clean if necessary. The blower motors are prelubricated for extended bearing life. No further lubrication is needed.
WARNING
The blower access panel must be securely in place when the blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal inju- ry or death.
Filters
All ML180UH filters are installed external to the unit. Filters should be inspected monthly. Clean or replace the filters when necessary to ensure that the furnace operates prop- erly. Replacement filters must be rated for high velocity air- flow. Table 1 lists recommended filter sizes.
Flue And Chimney
1 − Check flue pipe, chimney and all connections for tight- ness and to make sure there is no blockage.
2 − Check unit for proper draft. Electrical
1 − Check all wiring for loose connections.
2 − Check for the correct voltage at the furnace (furnace operating). Correct voltage is 120VAC + 10%.
3 − Check amp−draw on the blower motor with inner blow- er panel in place.
Unit Nameplate__________Actual__________
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