2.Turn off all electrical power to the appliance. (See Fig. 9.)
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3.Close the oil supply valve. (See Fig. 10).
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4.If applicable, turn off water sup- ply to humidifier.
5.If furnace blower will be neces- sary for cooling system, remem- ber to turn electric power back on when needed for air condi- tioning.
6.If the furnace is being shut down because of a malfunction, call your dealer as soon as possible.
ALWAYS KEEP MAIN OIL VALVE TURNED OFF IF BURNER IS SHUT DOWN FOR AN EXTENDED PERIOD OF TIME.
PERFORMING ROUTINE MAINTENANCE
With proper maintenance and care, your furnace will operate economi- cally and dependably. Instructions for basic maintenance follow. How- ever, before beginning maintenance, follow these safety precautions:
!WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal in- jury due to electrical shock.
Turn off all electrical power to furnace before performing any maintenance or service on unit.
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!CAUTION
CUTS AND ABRASION HAZARD
Failure to follow this caution may result in minor personal injury.
Although special care has been taken to minimize sharp edges, be extremely careful when handling parts or reaching into the furnace.
FILTERING OUT
TROUBLE
Dirty air filters will cause a loss of airflow in your duct system. When excessive loss of airflow occurs, the furnace may cycle on its safety controls. If this condition is left
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unattended, the furnace will even- tually lock out. It is recommended that the furnace air filters be checked every 3 or 4 weeks and cleaned or replaced as necessary.
!CAUTION
UNIT OVERHEAT HAZARD Failure to follow this caution may result in damage to the furnace blower motor, over- heat the heat exchanger and reduce the efficiency.
Never operate your furnace without the air filters in place.
The air filters are located in the blower compartment installed in an internal filter rack which is pro- vided as standard equipment with furnace. (See Fig. 2.) To inspect, clean, and or replace air filters, fol- low these steps:
1.Turn off electrical supply to fur- nace. (See Fig. 11.)
2.Remove blower access door in rear of furnace. (See Fig. 13.) Lift door up, then out using han- dle on blower access door.
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2
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3.Remove air filters from furnace.
a.Remove filter resting in filter rack at an angle in front of blower first. Slide filter back to clear filter rack ends then lift up and out of filter rack and blower compartment. (See Fig. 14.)
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