Use a soap-and-water solution. A failure to heed this warning could result in personal injury or death. 4. Turn gas supply manual shut-off valve on and check inlet pressure tap plug for leaks. 5. Turn furnace gas valve control knob to ON and check all threaded pipe connections for gas leaks. 6. Turn on electrical supply. 7. When pilot ignites, check pilot gas-supply tube connections for leaks. When main burners ignite, check manifold orifices for gas leaks. 8. Determine gas input: a. Turn

The kit can be used to convert propane gas 100% shutoff IID controls to natural 100% shutoff IID. It is designed for use in furnaces with 30,000- thru 100,000-Btuh nominal output capacity. These furnaces are to be installed only within California. NOTE: The definition of 100% shutoff refers to automatic shutoff of the pilot and main burner gas when the ignition source is not proven. NOTE: Read the entire instructions before starting the installation. There are additional parts shipped in the k

If your unit makes an especially loud noise when the main burners are ignited, shut down the heating section and call your dealer. Proceed as follows to inspect the combustion area and power- venting system of your unit. 1. Turn off electrical power and gas supply to your unit. 2. Remove burner access panel. (See Fig. 1.) 3. Using a flashlight, carefully inspect the burner areas for dirt, soot, rust, or scale. See Fig. 2. If dirt, soot, rust, or scale accumulations are found, call your dealer an

USAGE CONTENTS CRNGHIAT002A00 48PG16 9 Burner Orifices, Drill Size No. 31, 0.120 in. 9 Burner Orifices, Drill Size No. 32, 0.116 in. SAFETY CONSIDERATIONS Read these instructions entirely before installing the accessory high altitude kit into the base rooftop unit. Installation, start-up, and servicing of this equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs). Only trained, qualified installers and service technicians should install, start

5. Observe unit heating operation, and watch the burnerflame core to see if it is bright blue. If you observe a suspected malfunction, or if the burner flame cores are notbright blue, call your dealer. See Fig. 5. NOTE: Burner flame cores that have a mixture of orange, yellow, or red flames together with the blue may not beburning gas efficiently. Your dealer may have to adjustthe air/gas mixture. 6. Replace gas section access panel. Unit Panels and Doors — After performing any maintenance or se

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. — Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. — WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbor’s phone. Follow the gas suppl

This checkout should not be attempted by anyone not having the required expertise and equipmentto do the job properly. Checking and/or cleaning the heatexchanger involves removing the gas controls assembly andthe flue collector box cover and, when completed, reinstallingthe gas controls assembly for proper operation. Also, the fluecollector box cover must be replaced correctly so that a properseal is maintained. Contact your dealer for the required periodic maintenance. STEP 1 Run Status Service

1 SECTION 1 SECTION 2 LIMIT SWITCH NO. 2 FLUE OUTLET GAS VALVE Fig. 1 — Heat Section Details NOTE: High heat consists of sections 1-3. Low heat consists of sections 1 and 2 only. 055-100 SIZES LOW HEAT NOTE: High heat consists of sections 1 and 2. Low heat consists of section 1 only. 030-050 SIZES a48-8445a a48-8445b GAS VALVE FLUE OUTLET LIMIT SWITCH NO. 1 SECTION 1 LIMIT SWITCH NO. 2 SECTION 2 FLUE OUTLET GAS VALVE SECTION 3 FLUE OUTLET GAS VALVE Fig. 1 — Heat Section Details (cont) NOTE: High

See Fig. 13. 7. Turn the control knob on the internal gas valve to the PILOT position. 8. Place a lighted match or other suitable source of flame near the top of the pilot. See Fig. 14. Refer to the lighting instruction label affixed to the furnace blower access door. Depress the button or knob and hold it down. The pilot will light. Remove and extinguish the match while continuing to hold the button or knob down for at least 60 seconds. Then, release. The pilot will remain lit. NOTE: If th

See Fig. 20. Remove both access doors from your upflow furnace—the control access door first, and the blower access door second. Lift doors up and out. See Fig. 10 or 11. Remove only the blower access door of your downflow furnace. 2. Remove the filter. • UPFLOW FURNACES ONLY: Push the filter retainer toward the back of the furnace until it clears the flange at the front of the furnace casing. Gently remove the filter and carefully turn it over to avoid spilling any dirt that may be on the fil