York LL8V*DH, PV8*DH, FC8V*DH, FL8V*DH, LC8V*DH Safety Section, Furnace Maintenance Section

271015-UUM-A-0407

Every time the filters are changed the following items should be visually inspected:

•Check vent pipe for blockage or leakage.

•Check all components to be sure they are in good condition and that there are no obvious signs of deterioration.

•Check for dirt or lint on any surfaces or on components. Do not try to clean any of the surfaces or components. Cleaning of the fur- nace and its components must be done by a qualified service pro- fessional.

If, during the inspection of your furnace, you find any of the following conditions:

•Excessive amounts of dust and lint on components.

•Damaged or deteriorated components or surfaces.

•Leaks or blockage in the vent pipe passages.

•Water on any surface inside or outside of the furnace.

Do not operate the furnace, call a certified dealer / servicing contractor to check and / or clean your furnace, or for more information if you have questions about the operation of your furnace.

If all components appear to be in good operating condition, replace the front panels. Turn ON the gas and electrical power supplies to the fur- nace, and set thermostat to the desired temperature.

Air Filters

Dirty filters greatly restrict the flow of air and may cause damage to the moving parts of the furnace. If the filters become clogged the heat exchangers and blower motor could overheat resulting in a potentially dangerous situation.The filters should be checked every 3 months. On new construction, check the filters every week for the first four weeks and every three weeks after that, especially if the indoor fan is running continuously. When replacing the filter(s) you must use filters that are the same size as those recommended in Table 1. use the following pro- cedure to determine the filter size. Never operate your furnace without a suitable air filter.

Removing Filters

Externally Mounted Air Filters

Some installations may have the air filter in a rack attached to the cas- ing of the furnace or placed in the return air duct. You can gain access to the filter by pulling on the door or unscrewing the retaining screw, then slide the filter(s) out of its channel. Replace throw away filter(s) with the same size new filter(s). Throw away filter(s) may be replaced with cleanable filter(s) at this time. Cleanable filter(s) may be cleaned as described in the manufacturer instructions or as described below and then re-installed.

To replace the filter after cleaning you must do the following:

1.Slide filter into place.

2.Snap the door on or place the door in position and tighten the retaining screws, if provided.

3.Make sure the door is secure to the end of the filter rack.

TABLE 1: Filter Sizes

Cabinet Size	Top Return (in)	Top Return (cm)
A	(2) 14 x 20	(2) 35.6 x 50.8
B	(2) 14 x 20	(2) 35.6 x 50.8
C	(2) 14 x 20	(2) 35.6 x 50.8

How to Clean your Filter

High-velocity filters may be cleaned with a vacuum cleaner or washed with a garden hose. Be sure to shake off excess water and allow filter to completely dry before re-installing the filter.

Blower Care

Even with good filters properly in place, blower wheels and motors will become dust laden after long months of operation. The entire blower assembly should be inspected annually. If the motor and wheel are heavily coated with dust, they can be brushed and cleaned with a vac- uum cleaner. If the blower cannot be properly cleaned without removing it from the furnace, then this service must be performed by a qualified service agency.

Make sure you DO NOT move the clip on weight on the indoor fan wheel when cleaning the wheel. This weight is used to balance the wheel. Moving the weight will cause the fan wheel to vibrate.

Motor Lubrication

The motors in these furnaces are permanently lubricated, and do not require periodic oiling.

SECTION II: SERVICE AND MAINTENANCE MANUAL

SAFETY SECTION

The following safety rules must be followed when servicing the furnace.

ELECTRIC 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 operation, serious injury, and death or property damage.

•Before servicing, disconnect all electrical power to the fur- nace.

•When servicing controls, label all wires prior to disconnect- ing. Reconnect wires correctly.

•Verify proper operation after servicing.

FURNACE MAINTENANCE SECTION

The furnace should be cleaned and adjusted by a certified dealer or qualified service contractor once a year or before the start of every heating season. The following items must be cleaned and serviced or replaced if there are signs of deterioration.

1.The vent terminal screen (if applicable).

2.The furnace vent and combustion air intake passageways. Should it be necessary to service the vent/air intake system, the manufac- turer recommends this service be conducted by a qualified service agency. The operation of this appliance requires the reassembly and resealing of the vent/air intake system.

3.The furnace burners, ignitor and flame sensor.

4 Unitary Products Group