MAINTENANCE OF YOUR NEW GAS-FIRED FURNACE NOTE TO INSTALLER: THIS MANUAL MUST BE LEFT WITH THE EQUIPMENT USER. MODEL PG8UAA UPFLOW FURNACE WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.
Years went into the development of your new furnace. Take a little time now to assure its most efficient operation for years to come MODEL PG8DAA Downflow/Horizontal Furnace MODEL PG8UAA Upflow Furnace UPFLOW FURNACE COMPONENTS Relief Box...
DOWNFLOW/HORIZONTAL FURNACE COMPONENTS Manual-Reset Auxiliary Limit Switch (When Used) Blower and Blower Motor Relief Box Gas Valve Control Knob or Electric Switch (On/Off) Gas Valve Gas Burner Rating Plate Control with LED Light Blower Door Safety Switch Draft Safeguard Tube and Switch Gas Manifold Manual Reset Limit Switch (2) Hot Surface Ignitor...
SAFETY CONSIDERATIONS Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified personnel should install, repair, or service heating equipment. Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be performed by trained service personnel.
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2. Close the external manual gas valve. (See Fig. 8.) 3. Turn OFF the electrical supply to your furnace. (See Fig. 9.) 4. Remove the furnace access door(s). a. Downflow/Horizontal—remove blower door after removing 2 screws first, then remove the control door. (See Fig. 10.) b.
8. Turn ON the electrical supply to the furnace. (See Fig. 18.) 9. Open the external manual gas valve. (See Fig. 19.) 10. Set the room thermostat to a temperature slightly above the room temperature. This will automatically signal the furnace to start. The inducer motor will start, and the hot surface igniter will energize.
4. Remove the control access door on your furnace. (See Fig. 10 or 11.) On upflow furnaces, removing the blower access door is not required. 5. Turn the control knob or switch on the gas valve to the OFF position. (See Fig. 23 or 24.) 6.
5. Inspect the filter. If torn, replace the filter. 6 Wash the filter (if dirty) in a sink, bathtub, or outside with a garden hose. Always use cold tap water. A mild liquid detergent may be used if necessary. Spray water through the filter in the opposite direction of airflow. Allow filter to dry. 7.
DOWNFLOW/HORIZONTAL FURNACE FILTER TABLE FURNACE CASING WIDTH FILTER SIZE † FILTER TYPE 14-3/16 (2) 16 x 20 x 1* Cleanable 17-1/2 (2) 16 x 20 x 1* Cleanable (2) 16 x 20 x 1* Cleanable 24-1/2 (2) 16 x 20 x 1* Cleanable * Factory-provided with the furnace.
• If for some reason the vent is blocked, the draft safeguard switch will shut off the furnace. Reset the switch by pushing the button located on top of the switch. (See page 2 or 3 for switch location.) If the switch trips a second time, turn off the furnace and call for service. •...
INSTALLATION DATA SPLIT-SYSTEM OUTDOOR UNIT: Date Installed Product No. Dealer Name Model No. Address Serial No. City State INDOOR COIL: Telephone Product No. FURNACE Model No. Product No. Serial No. Model No. Serial No. THERMOSTAT Manufacturer Model No. —11—...
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