Induced Combustion Gas Furnace
Owner’s Manual
NOTE TO INSTALLER:
THIS MANUAL MUST BE LEFT WITH THE EQUIPMENT USER.
USER: Please read all instructions in the manual and retain all manuals for future reference.
A10247
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Use of the AHRI Certified TM Mark indicates a manufacturer’s participation in the program. For verification of certification for individual products, go to www.ahridirectory.org.
!WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings could result in injury, death, or property damage.
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.
-Leave the building immediately.
-Immediately call your gas supplier from a near by phone. Follow the gas supplier’s instructions.
-If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service agency or the gas supplier.
!WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury and/or death.
Carbon Monoxide is invisible, odorless, and toxic! Carrier Corp. recommends a carbon monoxide alarm in your home, even if you do not own a gas appliance. Locate the carbon monoxide alarm in the living area of your home and away from gas appliances and doorways to attached garages. Follow the alarm manufacturer’s instruction included with the alarm.
!WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury, death, or property damage.
Do not use this furnace if any part has been under water. A flood-damaged furnace is extremely dangerous. Attempts to use the furnace can result in fire or explosion. A qualified service agency should be contacted to inspect the furnace and to replace all gas controls, control system parts, electrical parts that have been wet or the furnace if deemed necessary.
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WELCOME TO TODAY’S GENERATION
OF COMFORT
Congratulations! Your new, higher efficiency gas furnace is a sound investment which will reward you and your family with years of warm memories winter after winter.
Not only is your new furnace energy efficient, it is also extremely reliable. Spend just a few minutes with this booklet to learn about the operation of your new furnace—and the small amount of maintenance it takes to keep it operating at peak efficiency. Years went into the development of your new furnace. Take a little time now to assure its most efficient operation for years to come.
TABLE OF CONTENTS
WELCOME TO A NEW GENERATION OF COMFORT . . . . 2 FURNACE COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 GENERAL FURNACE SAFETY . . . . . . . . . . . . . . . . . . . . . . . 2 IMPORTANT FACTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 3 BEFORE STARTING YOUR FURNACE . . . . . . . . . . . . . . . . . 3 STARTING YOUR FURNACE . . . . . . . . . . . . . . . . . . . . . . . . . 4 SHUTTING DOWN YOUR FURNACE . . . . . . . . . . . . . . . . . . 5 PERFORMING ROUTINE MAINTENANCE . . . . . . . . . . . . . 6 FILTERING OUT TROUBLE . . . . . . . . . . . . . . . . . . . . . . . . . . 6 COMBUSTION AREA AND VENT SYSTEM . . . . . . . . . . . . 8 BEFORE YOU REQUEST A SERVICE CALL . . . . . . . . . . . . 8 MAINTENANCE CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . 9 INSTALLATION DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
GENERAL FURNACE SAFETY
COMBUSTIBLE MATERIALS, GASOLINE WARNING. . . . 1 FLOOD DAMAGE WARNING . . . . . . . . . . . . . . . . . . . . . . . . 1 FIRE OR EXPLOSION HAZARD WARNING. . . . . . . . . . . . . . 1 CARBON MONOXIDE WARNING . . . . . . . . . . . . . . . . . . . . . 1
FURNACE MUST BE KEPT FREE AND CLEAR OF INSULATING MATERIAL WARNING. . . . . . . .. . . . . . . . . . . 3
STARTING (LIGHTING) AND SHUTTING DOWN THE FURNACE WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4,5
PROPER FURNACE SHUTDOWN PROCEDURES . . . . . . . 5
SERVICE AND MAINTENANCE ELECTRICAL HAZARD WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 6
IMPROPER VENT WARNING . . . . . . . . . . . . . . . . . . . . . . . . . 6 SHARP EDGES CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . 6 NO FILTER CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 FILTER ROD MODIFICATION CAUTION . . . . . . . . . . . . . .7 DIRT, RUST, OR ACCUMULATION CAUTION . . . . . . . . . . . 8
FURNACE NEEDS AIR FOR COMBUSTION AND VENTILATION WARNING . . . . . . . . . . .. . .. .. . . .. . . . . . . 8
DRAFT SAFEGUARD SWITCH CAUTION . . .. . . . . . . . . . . 8
FURNACE COMPONENTS
(Furnace shown in upflow position; may be used in downflow or horizontal orientation or applications. Vent Elbow may be turned to a different position, depending on type of installation)
INDUCER MOTOR |
ASSEMBLY |
PRESSURE |
SWITCH |
FLUE COLLECTOR |
BOX |
GAS VALVE |
MANUAL RESET |
LIMIT SWITCHES |
HOT SURFACE |
IGNITOR |
BLOWER |
DOOR SAFETY |
SWITCH |
FURNACE |
CONTROL |
BOARD |
VENT |
ELBOW |
MAIN LIMIT SWITCH |
(BEHIND GAS VALVE) |
BLOCKED VENT |
SWITCH |
FLAME |
SENSOR |
GAS MANIFOLD |
GAS BURNER |
BLOWER AND |
MOTOR |
CAPACITOR/ |
POWER CHOKE |
A10259
Fig. 1 - 80% AFUE Single Stage Furnace Components
INDUCER MOTOR |
ASSEMBLY |
PRESSURE |
SWITCHES |
FLUE COLLECTOR
BOX
GAS VALVE
MANUAL RESET
LIMIT SWITCHES
HOT SURFACE
IGNITOR
BLOWER DOOR
SAFETY SWITCH
FURNACE CONTROL
BOARD
VENT
ELBOW
MAIN LIMIT SWITCH (BEHIND GAS VALVE)
BLOCKED VENT
SWITCH
FLAME
SENSOR
GAS MANIFOLD
GAS BURNER
BLOWER AND
MOTOR
CAPACITOR/
POWER CHOKE
A10260
Fig. 2 - 80% AFUE Two-Stage Furnace Components
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IMPORTANT FACTS (DO’S AND DON’TS)
S DO: READ AND UNDERSTAND THIS MANUAL.
SDO: Have your furnace and vent system inspected annually by a qualified service technician.
SDO: Inspect your filter monthly and clean or replace when needed.
SDO: Provide adequate airflow to the furnace for efficient combustion and safe ventilation.
SDO: Keep your furnace free and clear of insulating material. Some materials may be combustible. Examine the furnace area
when the furnace is installed or when insulation is added.
SDO NOT: Enclose your furnace in an airtight room or seal it behind solid doors.
SDO NOT: Keep combustible materials, gasoline, and other flammable liquids or vapors around your furnace.
S DO NOT: Cover your furnace in any manner.
SDO NOT: Store anything (including trash or debris) near your furnace.
SDO NOT: In any way block or restrict airflow around your furnace.
SDO NOT: In any way block or restrict airflow to your supply air and return air grills.
SDO NOT: Use your furnace room as a broom closet or a place to store any kind of chemical or cleaner.
SDO NOT: Contaminate the air used for combustion of your furnace with any kind of chemical or fumes. This could also cause heat exchangers, metal vent systems or components to deteriorate.
NOTE: These chemicals or fumes are present in many products around the home, such as: water softener salts, any type of household cleaning product, any type of laundry product, adhesives, paints, varnishes, paint strippers, waxes and plastics, etc.
During remodeling be sure the combustion air is fresh and uncontaminated. If these compounds are burned in your furnace, the heat exchangers and metal vent system may deteriorate.
NOTE: The qualified installer or agency must use only factory-authorized replacement parts, kits, and accessories when modifying this product.
This furnace contains safety devices which must be manually reset. If the furnace is left unattended for an extended period of time, have it checked periodically for proper operation. This precaution will prevent problems associated with no heat, such as frozen water pipes, etc. See “Before You Request a Service Call” section in this manual.
!WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow this safety warning could result in injury, death, or property damage.
Do not keep combustible materials, gasoline, and other flammable liquids or vapors around your furnace.
!WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings could result in personal injury, death, or property damage.
Keep insulation clear of furnace and maintain clearances shown on unit clearance label.
BEFORE STARTING YOUR FURNACE
Examine the furnace installation to determine that:
1.All flue gas carrying areas external to the furnace (i.e. chimney, vent connector) are clear and free of obstructions.
2.The vent connector is in place, slopes upward and is physically sound without holes or excessive corrosion.
3.The return-air duct connection(s) is physically sound, is sealed to the furnace casing, and terminates outside the space containing the furnace.
4.The physical support of the furnace is sound without sagging cracks, gaps, etc. around the base.
5.There are no obvious signs of deterioration of the furnace.
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 or replacing air filters. All other operations must be performed by trained service personnel. Observe safety precautions in this manual, on tags, and on labels attached to the furnace, and other safety precautions that may apply.
Recognize safety information. This is the safety-alert symbol 
. When you see this symbol on the furnace and in instructions or manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and CAUTION. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability or operation.
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