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It also keeps the dirt from circulating through your home. As the filter continues to collect these particles, it becomes clogged and no longer allows enough air to circulate through the furnace. If this happens, the heat exchangers and blower motor could overheat; a potentially dangerous situation. It is very important to keep the air filter clean! Never operate your furnace without a suitable air filter. WARNING: When replacing filters DO NOT use a type with excessively highpressuredrop. Some high efficiencyfiltersavailable will cause the furnace to operateimproperly andcouldresult ina safetyhazard. FREQUENCY OF CHECKING FILTERS Clean your furnace’s filter at least every three months. If you need to replace a filter, check the filter chart to be sure you install the right size and type of filter for your furnace. If your home is new, you should check the filter every week for the first four weeks after you begin to use the furnace, and then at least every three weeks after that, especially if the system runs constantly. NOTE: Some instal llations may have morethan one filter. LOCATING/REMOVING FILTERS UPFLOW FURNACES Most upflow furnaces have their filters located on the side or bottom of the furnace in a filter frame. If your furnace has this type return filter frame, remove the door by pulling on it. Slide the filter out of its channel. To replace after cleaning, slide filter into place and snap the door on the end of the filter rack. Some installations may have filters located in the blower compartment. Check with the installer for your filter location. UPFLOW FURNACE WITH EXTERIOR FILTER RACK UPFLOW FURNACE BOTTOM MOUNT FILTER RETAINER To check filters located in the blower compartment, remove the upper furance door by lifting up. Pull out bottom of door and lower from furnace. Remove the blower compartment panel by lifting up. NOTE: The spring-loaded safety cutoff switch, mountedunderthe blowerdeck willautomaticallycut off the electrical powersupplyto the furnace whentheblowerpanel isremoved. To remove bottom mounted filter(s) on all furnaces, push the looped end of the filter retainer to the side and then lift up. Reverse the procedure to reinstall filters. DOWNFLOW FURNACES The filters in your downflow furnace are located in the plenum or ductwork above the furnace.To check the filters, turn off the electrical supply to the furnace. VENT PIPERETURNAIRDUCTACCESSPANELFURNACE DOWNFLOW FURNACE TYPICAL FILTER LOCATION 3 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 theelectrical supplytothe furnace whenthebloweraccess door isremoved. FURNACERETURN AIR DUCT HORIZONTAL FURNACE TYPICAL FILTER LOCATION HORIZONTAL FURNACES Most horizontal furnaces have their filters 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 accessory, 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 garden hose. Be sure to shake off excess water before re-installing the filter. MOTOR LUBRICATION The motors in these furnaces are permanently lubricated, and require no periodic oiling. INSTALLATION AND MAINTENANCE INSTRUCTIONS YORK strongly recommends regular periodic preventative maintenance on this equipment. In order to ensure safe, reliable operation and long product life, it is recommended that the entire heating system be inspected annually by a qualified service person. The person most familiar with the equipment in your system is a YORK dealer. The YORK dealer can ensure your maintenance 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 refrigerants. The inspection should include heating element, vent piping, to see that they are clear and free of obstructions and without 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 wel ll ventilated. Turnthe thermostatOFF.If t...
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