Contents

OWNERS MANUAL
- NOTE: Read the entire instruction manual before starting the installation.
  - A200116
  - IMPORTANT FACTS (DOS AND DONTS)
  - FURNACE COMPONENTS
    - Fig. 1 80% AFUE Single Stage Furnace Components
    - Fig. 2 80% AFUE Two-Stage Furnace Components
  - TABLE OF CONTENTS
  - SAFETY CONSIDERATIONS
  - BEFORE STARTING YOUR FURNACE
    - 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.
  - STARTING YOUR FURNACE
    - Fig. 3 Do Not Light Burner with Match
  - STEPS FOR STARTING YOUR FURNACE
    - 1. Set your room thermostat to the lowest temperature setting (see Fig. 4).
    - Fig. 4 Lowest Temperature Setting
      - 2. Close the external manual gas valve (see Fig. 5).
    - Fig. 5 Close Valve
      - 3. Turn OFF electrical supply to the furnace (see Fig. 6).
    - Fig. 6 Turn Off Electrical Supply
      - 4. Remove the outer door by loosening the thumbscrew and pulling the door forward (see Fig. 7).
    - Fig. 7 Remove Furnace Door
      - 5. Turn the control switch on the gas control to the OFF position and wait 5 minutes (see Fig. 8). Then smell for gas, including near the floor. If you smell gas, STOP! Follow B on furnace label. If you dont smell gas, go to next step.
    - Fig. 8 Control Switch to OFF
      - 6. After waiting 5 minutes, if you still smell gas, STOP! Follow the safety information on the cover of this manual. If you do not smell gas, go to the next step.
      - 7. Turn the control switch to ON (see Fig. 9).
    - Fig. 9 Control Switch to ON
      - 8. Replace the outer door and tighten the thumbscrew (see Fig. 10).
    - Fig. 10 Furnace Door Replaced
      - 9. Turn ON the electrical supply to the furnace (see Fig. 11).
    - Fig. 11 Turn On Electrical Supply
      - 10. Open the external manual gas valve (see Fig. 12).
    - Fig. 12 Open Valve
      - 11. 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. When hot, the igniter will have an orange glow
      - 12. After about 17 seconds, the gas valve permits gas to flow to the main burners where it is ignited. Hot flames begin to warm the furnaces heat exchanger. After a time delay of approximately 25-45 seconds the furnace blower is switched on.
      - 13. Set your thermostat to the temperature that satisfies your comfort requirements.
  - SHUTTING DOWN YOUR FURNACE
    - 1. Set your room thermostat to the lowest temperature setting (see Fig. 4).
    - 2. Close the external manual gas valve (see Fig. 5).
    - 3. Turn off electrical supply to the furnace (see Fig. 6).
    - 4. Remove outer furnace door (see Fig. 7).
    - 5. Turn the switch on the gas control to the OFF position (see Fig. 8).
    - 6. Replace the outer furnace door (see Fig. 10).
    - 7. If the furnace is being shut down because of a malfunction, call your dealer as soon as possible.
  - PERFORMING ROUTINE MAINTENANCE
  - FILTERING OUT TROUBLE
    - 1. Turn off the electrical supply to the furnace (see Fig. 13).
    - Fig. 13 Turn Off Electrical Supply
      - 2. Remove filter cabinet door/rack.
      - 3. Slide air filter out of filter cabinet. Keep dirty side up (if dirty) to avoid spilling dirt
      - 4. Inspect the filter. If torn, replace it.
      - a. Factory specified disposable media filter Do not clean. If dirty, replace only with media filter having the same part number and size. Install with airflow direction arrow pointing towards blower (some models may vary).
      - b. Electronic Air Cleaner (EAC) Refer to EAC Owners Manual for maintenance information (some models may vary).
      - c. Factory specified disposable filter, do not clean. Replace it with a new filter of same size.
      - d. Wash filter (if dirty) in 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 filter in the opposite direction of airflow. Allow filter to dry.
      - 5. Reinstall clean air filter.
      - 6. Replace filter cabinet door
      - 7. Turn on electrical supply to furnace (see Fig. 11).
  - COMBUSTION AREA AND VENT SYSTEM
    - 1. Turn off electrical supply to the furnace and remove the access door (see Fig. 6 and Fig. 7).
    - 2. Carefully inspect the gas burner for dirt, rust, or scale. Inspect the elbow, flue connection area, and the vent pipe for rust.
    - Fig. 14 Burner Flame
      - 3. Inspect the vent pipe for a sag, holes, or a disconnection. A horizontal vent pipe must slope upward away from furnace. If rusty joints or seams, or signs of water leakages are found, call your dealer for service.
      - 4. Restore electrical power to the furnace (see Fig. 11).
      - 5. Start the furnace and observe its operation. If possible, watch the burner flames. Are they burning bright blue? If not or if you suspect some other malfunction, call your servicing dealer.
      - 6. Replace the access door (see Fig. 10).
  - BEFORE YOU REQUEST A SERVICE CALL
  - A200102
    - MAINTENANCE CHECKLIST

Tempstar F80CTL Owner's Manual

Tempstar F80CTL Gas Furnace manual cover

Pages 8

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Tempstar F80CTL Gas Furnace Specification

The Tempstar F80CTL Gas Furnace is engineered to deliver reliable and efficient heating solutions for residential spaces. This forced-air furnace operates with a multi-speed PSC blower motor, enhancing comfort by providing consistent air circulation and temperature regulation. The unit boasts an 80% AFUE rating, indicating its ability to convert a substantial portion of energy into heat, making it an economical choice for homeowners seeking to balance performance with cost-efficiency.

The F80CTL is equipped with a single-stage gas valve, ensuring straightforward operation and dependable performance during peak heating demands. Its heat exchanger, constructed from aluminized steel, is designed for durability and efficient heat transfer, contributing to the furnace’s overall longevity and reliability. The appliance is compatible with both natural gas and propane, offering flexibility based on fuel availability and user preference.

In terms of safety and usability, the Tempstar F80CTL includes an electronic ignition system, which eliminates the need for a standing pilot light, enhancing safety and energy efficiency. The control board of the furnace is equipped with diagnostic capabilities, simplifying maintenance by providing clear error codes for troubleshooting. The compact design of the unit facilitates easy installation in various spatial configurations, whether in a basement, closet, or utility room.

Additionally, the furnace supports add-on features such as humidifiers and air purifiers, allowing users to customize their home comfort systems further. The Tempstar F80CTL Gas Furnace represents a blend of cost-effective heating, ease of use, and adaptability, making it a suitable choice for a wide range of residential heating applications.

Tempstar F80CTL Gas Furnace F.A.Q.

How do I change the air filter in my Tempstar F80CTL Gas Furnace?

To change the air filter, turn off the furnace, locate the filter compartment (usually near the return air duct), remove the old filter, and insert a new one matching the size and type specified in the user manual, ensuring the airflow arrows point towards the furnace.

What should I do if my Tempstar F80CTL furnace is not heating?

Check if the thermostat is set to 'heat' and the temperature is above the current room temperature, ensure the furnace switch is on, verify the circuit breaker hasn't tripped, and inspect the pilot light or electronic ignition system. If issues persist, consult a professional technician.

Why is my Tempstar F80CTL furnace making unusual noises?

Unusual noises may indicate a loose blower wheel, motor bearings needing lubrication, or ductwork issues. Inspect these components and tighten, lubricate, or secure as necessary. If the noise continues, contact a qualified technician.

How often should I schedule maintenance for my Tempstar F80CTL furnace?

It is recommended to schedule professional maintenance for your Tempstar F80CTL furnace at least once a year, ideally before the heating season begins, to ensure optimal performance and efficiency.

What is the recommended thermostat setting for energy efficiency with the Tempstar F80CTL furnace?

For energy efficiency, set the thermostat to 68°F (20°C) when you are at home and awake, and lower it by 7-10°F when you are asleep or away from home. Consider using a programmable thermostat for automatic adjustments.

How can I improve the airflow in my Tempstar F80CTL furnace?

Ensure that vents are open and unobstructed, replace the air filter regularly, and check for any blockages in the ductwork. Additionally, inspect the blower fan and clean if necessary.

What should I do if the pilot light on my Tempstar F80CTL furnace goes out?

First, ensure the gas supply is on, then follow the manufacturer's instructions to relight the pilot. Typically, this involves turning the gas valve to 'pilot', pressing the reset button, and using a match or lighter to ignite the pilot. If it does not stay lit, contact a technician.

Is it normal for the Tempstar F80CTL furnace to emit a burning smell when first turned on?

Yes, a burning smell is normal when the furnace is first turned on after a long period of inactivity, as dust burns off. If the smell persists or is strong, inspect the furnace for dust accumulation or other issues, and consider contacting a professional for a thorough cleaning.

How can I reset the control board on my Tempstar F80CTL furnace?

To reset the control board, turn off power to the furnace at the circuit breaker, wait for about 5 minutes, and then restore power. This will reset the control board. If problems persist, consult the user manual or a professional technician.

What are the signs that my Tempstar F80CTL furnace needs repair?

Common signs include frequent cycling on and off, unusual noises, uneven heating, increased energy bills, and visible signs of wear or damage. If you notice any of these, it's advisable to contact a qualified technician for inspection and repair.