Externally Side Mounted Air Filters
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 in “How to Clean Your Filter”.
This furnace has the filter(s) mounted externally to the cabinet on either both sides of the cabinet, one side and the bottom of the cabinet, or the bottom of the cabinet only DO NOT place the air filter(s) on the inside of the blower compartment on this furnace. The air filter(s) must be placed in the externally mounted air filter hardware. Follow the instructions below to remove and replace the air filter(s).
1.Before removing the air filters follow the instructions “To Turn Off the Appliance” on page 3.
2.Remove the cover on the front of the filter box by removing the retaining screw or knob that secures the cover to the box. The external filter box may be located on one side or both sides of the furnace cabinet. Refer to Figure 9 for filter box locations.
3.Use your fingers to grab the outside edge of the filter and remove the filter(s) from the filter box.
4.If the filter(s) are permanent cleanable filter(s) follow the instruc- tions on how to clean your filter or you may replace the throwaway filter with permanent cleanable filter(s) at this time. Refer to Table 1 for the recommended air filter size.
5.Install the filter(s). The filter(s) should fit in the entire filter track. If the filter does not fit inside the entire filter track then the filter you have is the wrong size. Refer to Table 1 for the recommended filter size.
6.Reinstall the filter box access cover.
7.Follow the Operating Instructions on page 3 to place the furnace back in service
FIGURE 9: Side Return Filter Rack in the Horizontal Position
TABLE 1: Air Filter Size
Side Return | Bottom/End Return | ||
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in. | cm | in. | cm |
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16 x 25 | 41 x 63.5 | (2)16 x 29 | (2)41 x 74 |
Return air duct(s) may consist of either a bottom return only, or a bottom return and one side return.
A single side return or a
An Accessory External Side Filter Rack and an Accessory External Bottom Filter Rack are available.
Refer to the accessories section at the back of these instructions for the Filter Rack part numbers
How to Clean your 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, igniter and flame sensor.
Unitary Products Group | 5 |
