Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional information, consult a qualified installer, service agency, or the gas supplier. FOR YOUR SAFETY 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 supplier’s instructions. •

Contact your dealer for the required periodic maintenance. Fans and Fan Motor — Periodically check the condition of fan wheels and housings and fan-motor shaft bearings. No lubrication of condenser-or evaporator-fan bearings or motors is required or recommended. Evaporator and Condenser Coils — Cleaning of the coils should only be done by qualified service personnel. Contact your dealer for the required annual maintenance. Condensate Drain — The drain pan and condensate drain line should be chec

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

Units are lightweight and install easily on a rooftop or a ground-level pad Convertible duct configuration Unit is designed for easy use in either downflow or horizontal applications Efficient operation High-efficiency design with SEERs (Seasonal Energy Efficiency Ratios) . of 10.0 and AFUE (Annual Fuel Utilization Efficiency) ratings as high as 81 0% All units have a minimum CSE (California Seasonal Efficiency) rating of 76% Copyright 1994 Carrier Corporation Form 48SS-2PD Energy-saving,

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

as the enzymatic activity will be destroyed. 5. Thoroughly apply Totaline environmentally sound coil cleaner solution to all coil surfaces including finned area, tube sheets and coil headers. 6. Hold garden sprayer nozzle close to finned areas and apply cleaner with a vertical, up-and-down motion. Avoid spraying in horizontal pattern to minimize potential for fin damage. 7. Ensure cleaner thoroughly penetrates deep into finned gueas. 8. Interior and exterior finned meas must be thoroughlycleaned

Consult a qualified installer, service agency, or your local gas supplier for information or assistance. FOR YOUR SAFETY What to do if you smell gas: 1. Do not try to light any appliance. 2. Do not touch any electrical switch. 3. Do not use any phone in your building. Immediately call your gas supplier from a neighbor s phone. Follow tne gas supplier’s instructions. 4. If you cannot reach your aas supplier, call the fire department. NOTE TO INSTALLER: This manual must be left with the eq

On downflow furnaces, the blower access door must be removed before the control access door is removed, then reinstalled. • Is the control knob on the internal gas valve turned to the ON position? If it is not, be sure it has not been turned OFF for the purpose of safety. If nothing else seems to be amiss, follow the startup procedures found on the furnace. • If your furnace has a manual ignition (continuous) pilot system, check for pilot flame. If there is no pilot flame, follow the manual st

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

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