York Understanding Furnace Filter Location for Optimal Maintenance

Remove the access cover in the return air duct above furnace and slide the filter(s) out of the filter channel. You may need to tilt the filter in order to clear the vent pipe.

NOTE: The spring-loaded safety cutoff switch, mounted to the blower deck will automatically cut off the electrical supply to the furnace when the blower access door is removed.

FURNACE RETURN AIR DUCT

HORIZONTAL FURNACE TYPICAL FILTER LOCATION

HORIZONTAL FURNACES

Most horizontal furnaces have their fil- ters located in a filter grille(s) so that it may be easily changed without gaining access to the attic or crawlspace.

Some installations may have a filter rack near the furnace. With this type of acces- sory, unsnap the filter rack door and pull. The filter is attached to the door and will slide out. If you are unsure where the furnace filter is installed, check with the installer.

HOW TO CLEAN YOUR FURNACE’S FILTER

High-velocity filters may be cleaned with a vacuum cleaner or washed with a gar- den hose. Be sure to shake off excess water before re-installing the filter.

MOTOR LUBRICATION

The motors in these furnaces are perma- nently lubricated, and require no peri- odic oiling.

INSTALLATION AND MAINTENANCE INSTRUCTIONS

YORK strongly recommends regular pe- riodic preventative maintenance on this equipment.

In order to ensure safe, reliable opera- tion and long product life, it is recom- mended that the entire heating system be inspected annually by a qualified service person.

The person most familiar with the equip- ment in your system is a YORK dealer. The YORK dealer can ensure your main- tenance program meets the conditions of the "YORK Warranty", maximize the efficiency of the equipment, and service your unit within the mandated guidelines with regard to unlawful discharge of re- frigerants.

The inspection should include heating element, vent piping, to see that they are clear and free of obstructions and with- out holes or corrosion. Make sure the horizontal run of the vent system slopes upward and all of the connections are secure. Make sure the return air duct connections are physically sound and sealed to the furnace casing. Make sure no sagging, cracks, gaps, etc. exist around the base of the furnace.

Routine periodic maintenance checks should be done on your furnace at least every time you check the filters. Proper burner flame appearance is shown below.

BLUE CONE PORTION OF

FLAME SHOULD ENTER HEAT

EXCHANGER TUBE

PROPER BURNER FLAME

APPEARANCE

CAUTION: Before proceeding, be sure the area is well venti- lated. Turn the thermostat OFF. If the blower is running, wait until it stops automatically. Turn OFF the gas and electrical power sup- plies to the furnace. Check all metal parts and surfaces to be sure they have cooled to room temperature before you begin.

Remove the front panels and turn the knob on the gas control to the OFF po- sition. Check the following items:

∙Check for dust and lint on the sensor and main burners.

∙Check the vent pipe and chimney for blockage, corrosion or leakage or any obstructions.

SUGGESTED HIGH VELOCITY

FILTER SIZES

UPFLOW	FILTER SIZE
MODELS	Side	Bottom
P3HUA08N03201	16 x 26	14 x 26
P3HUA12N03201	16 x 26	14 x 26
P3HUA08N04801	16 x 26	14 x 26
P3HUA12N04801	16 x 26	14 x 26
P3HUA12N06401	16 x 26	14 x 26
P3HUB16N06401	16 x 26	16 x 26
P3HUC20N06401	(2) 16 x 26	20 x 26
P3HUB12N08001	16 x 26	16 x 26
P3HUB16N08001	16 x 26	16 x 26
P3HUC20N08001	(2) 16 x 26	20 x 26
P3HUC16N09201	16 x 26	20 x 26
P3HUC20N09201	(2) 16 x 26	20 x 26
P3HUD20N10401	(2) 16 x 26	24 x 26

DOWNFLOW	FILTER SIZE
MODELS
P3DNA08N03201	(2) 14 x 20
P3DNA08N04801	(2) 14 x 20
P3DNA12N04801	(2) 14 x 20
P3DNA12N06401	(2) 14 x 20
P3DNB16N06401	(2) 14 x 20
P3DNB12N08001	(2) 14 x 20
P3DNC20N08001	(2) 14 x 20
P3DNC16N09201	(2) 14 x 20
P3DNC20N09201	(2) 14 x 20
P3DND20N10401	(2) 14 x 20

*Eighth place model designator may be "N" for standard units or "L" for factory built Lo NOx units.

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

If all components appear to be in good operating condition, turn the gas control to the ON position. Replace the front panels. Restore gas and power supplies to the furnace, and set thermostat to the desired temperature.

If, during your inspection of your furnace, you find any of the following conditions, do not operate the furnace:

∙Excessive amounts of dust and lint on components.

∙Damaged or deteriorated compo- nents or surfaces.

∙Leaks or blockage in the vent pipe passages.

Call a certified servicing contractor to check your furnace, or for more informa- tion if you have questions about the op- eration of your furnace.

Unitary Products Group
P.O. Box 1592, York, Pennsylvania USA 17405-1592
Subject to change without notice. Printed in U.S.A.		650.74-O1Y (297)
Copyright ã by York International Corporation 1997. All Rights Reserved.	Code: EBY, EGY