Contents

OWNERS MANUAL
- TABLE OF CONTENTS
- IMPORTANT FACTS (DOS AND DONTS)
- FURNACE COMPONENTS
  - Fig. 1 Furnace Components
- SAFETY CONSIDERATIONS
  - Fig. 2 Exterior Vent Pipes
  - Fig. 3 Interior Combustion - Air Pipe
  - Fig. 4 NO combustible materials near furnace
- 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 gaps.
  - 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.
  - 6. The burner flames are in good adjustment (see Fig. 5) (by comparison with pictorial sketches or drawings of the main burner flame).
  - Fig. 5 Burner Flame Adjustment
- STARTING YOUR FURNACE
  - Fig. 6 Do Not Light Burner with Match
- STEPS FOR STARTING YOUR FURNACE
  - 1. Set your room thermostat to the lowest temperature setting and set the MODE to OFF (see Fig. 7).
  - Fig. 7 Lowest Temperature Setting
    - 2. Close the external manual gas valve (see Fig. 8).
  - Fig. 8 Close Valve
    - 3. Turn OFF electrical supply to the furnace (see Fig. 9).
  - Fig. 9 Turn Off Electrical Supply
    - 4. Remove the main furnace door (see Fig. 10).
  - Fig. 10 Remove Main Furnace Door (Upflow Configuration)
    - 5. Turn the control switch on the gas control to the OFF position and wait five minutes (see Fig. 11). 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. 11 Control Switch to OFF
    - 6. After waiting five minutes, turn control switch on the gas control to the ON position. Turn the control switch to ON (see Fig. 12).
  - Fig. 12 Control Switch to ON
    - 7. Replace main furnace door (see Fig. 13).
  - Fig. 13 Furnace Door Replaced (Upflow Configuration)
    - 8. Turn ON the electrical supply to the furnace and wait one minute (see Fig. 14).
  - Fig. 14 Turn on Electrical Supply
    - 9. Open the external manual gas valve (see Fig. 15).
  - Fig. 15 Open Valve
    - 10. Set the room thermostat MODE to HEAT and adjust the set point to a temperature slightly above the room temperature. This will automatically signal the furnace to start.
    - 11. When the furnace receives the start signal, the combustion air draft inducer is started. When the pressure switch senses that there is sufficient combustion air, the hot surface igniter is energized. After the hot surface igniter is heated for ab...
    - 12. 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 and set the MODE to OFF (see Fig. 16).
  - Fig. 16 Lowest Temperature Setting
    - 2. Close the external manual gas valve (see Fig. 17).
  - Fig. 17 Close the External Manual Valve
    - 3. Turn off electrical supply to the furnace (see Fig. 18).
  - Fig. 18 Turn Off Electrical Supply
    - 4. Remove main furnace door (see Fig. 10).
    - 5. Turn control switch on the gas control to OFF position (see Fig. 11).
    - 6. Replace main furnace door (see Fig. 13).
    - 7. If the furnace is being shut down because of a malfunction, call your dealer as soon as possible.
- MINIMUM & MAXIMUM TEMPERATURE SETTING FOR YOUR FURNACE
- PERFORMANCE ROUTINE MAINTNENANCE
- FILTERING OUT TROUBLE
  - 1. Turn off electrical supply to the furnace (see Fig. 19).
  - 2. Remove air filter from the filter cabinet.
  - a. Remove filter cabinet door (see Fig. 20 and Fig. 21).
  - b. Slide air filter out of furnace. Keep dirty side up (if dirty) to avoid spilling dirt (see Fig. 22 and Fig. 23).
  - 3. Inspect the filter. If torn replace it.
  - 4. If washable filter, wash 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 filter in the opposite direction of airflow. Allow filte...
  - 5. Reinstall clean air filter.
  - 6. Turn on electrical supply to the furnace.
  - Fig. 19 Turn Off Electrical Supply
  - Table 1 Air Filter Located in Filter Cabinet
- COMBUSTION AIR AND VENT SYSTEM
  - 1. Turn off electrical supply and gas supply to the furnace and remove the main furnace door (see Fig. 7, Fig. 8, Fig. 9, Fig. 10 and Fig. 11).
  - 2. Inspect the gas burners, igniter area, and remainder of furnace for dirt, rust, soot or scale.
  - Fig. 20 Gas Burner Assembly (Upflow)
  - Fig. 21 Gas Burner Assembly (Downflow)
    - 3. Inspect the combustion-air and vent PVC pipes for sags, holes, cracks, water leaks, blockage or disconnections. Horizontal portions of vent pipe must slope downward toward the furnace.
    - 4. If your furnace is free of the above conditions, turn on electrical and gas supplies to the furnace.
    - 5. Start your furnace and observe its operation. Watch the burner flames to see if they are clear blue, almost transparent (see Fig. 22). If you observe a suspected malfunction, or the burner flames are not clear blue, call your dealer.
    - 6. Replace main furnace door.
  - Fig. 22 Burner Flame Adjustment
- WINTERIZATION
  - 1. Obtain propylene glycol (RV/swimming pool antifreeze or equivalent).
  - 2. Turn off gas and electrical supplies to your furnace.
  - 3. Remove furnace control compartment door.
  - 4. Remove one of the unused rubber plugs in the port on the collector box opposite the condensate trap. See Fig. 23
  - 5. Connect a field supplied 3/8-in. (9.5-mm) ID tube to the open port on the collector box.
  - 6. Insert a field supplied funnel into the tube.
  - 7. Pour 1 quart of anti-freeze solution into the funnel/tube. Antifreeze should run through the inducer housing, overfill condensate trap and flow to an open drain.
  - 8. If a condensate pump is used, check with pump manufacturer to verify pump is safe for use with antifreeze used. Allow pump to start and pump anti-freeze to open drain.
  - 9. Remove funnel and tube from collector box.
  - 10. Replace plug in collector box.
  - 11. Remove the other plug and repeat steps 4-10.
  - 12. Replace main door.
  - 13. When furnace is re-started, flush condensate pump with clear water to check for proper operation before re-starting furnace.
  - 14. Propylene glycol need not be removed before re-starting furnace.
  - Fig. 23 Winterizing Furnace
- A CHECK-UP CHECKLIST
  - Fig. 24 Information Booklet Location
- BEFORE YOU REQUEST A SERVICE CALL
  - For insufficient airflow:
  - If furnace fails to operate:
- A200102
  - MAINTENANCE CHECKLIST

Tempstar F96CTN Owner's Manual

Tempstar F96CTN Gas Furnace manual cover

Pages 12

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Tempstar F96CTN Gas Furnace Specification

The Tempstar F96CTN Gas Furnace is a high-efficiency, two-stage, variable-speed heating system designed to provide optimal comfort and energy savings. At its core, the F96CTN utilizes a two-stage gas valve that allows for more precise temperature control, enhancing comfort by reducing temperature swings. This furnace operates with an Annual Fuel Utilization Efficiency (AFUE) rating of up to 96%, indicating its ability to convert a significant portion of fuel into usable heat, making it an economical choice for homeowners seeking to reduce energy consumption.

The variable-speed ECM blower motor is a standout feature, providing quiet operation and improved air circulation throughout the home. This motor adjusts its speed based on the heating demand, offering better humidity control and consistent indoor temperature. The F96CTN also includes a fully insulated cabinet to minimize heat loss and noise, contributing to its quiet performance.

Reliability and durability are emphasized with the incorporation of a stainless steel primary heat exchanger and an AL29-4C stainless steel secondary heat exchanger, both designed to resist corrosion and ensure long-term operation. The furnace is compatible with various thermostats, including Wi-Fi-enabled models, enabling users to control heating remotely for added convenience.

Safety features include a robust electronic ignition system and advanced diagnostic capabilities that facilitate maintenance and troubleshooting. The F96CTN is designed for flexible installation, accommodating upflow, downflow, and horizontal configurations, making it suitable for a wide range of home layouts. Overall, the Tempstar F96CTN Gas Furnace combines advanced technology with high efficiency and reliability, offering an excellent solution for residential heating needs.

Tempstar F96CTN Gas Furnace F.A.Q.

What is the recommended maintenance schedule for a Tempstar F96CTN gas furnace?

It is recommended to schedule annual maintenance for your Tempstar F96CTN gas furnace. This service should include checking the thermostat settings, tightening electrical connections, lubricating moving parts, inspecting the condensate drain, and checking system controls.

How do I troubleshoot if the Tempstar F96CTN furnace is not heating properly?

First, check the thermostat settings to ensure they are correct. Next, inspect the air filter to see if it is clean. Verify that the gas supply is on and that the pilot light is lit (if applicable). If the problem persists, contact a professional technician.

What should I do if the furnace blower is running continuously?

Check the thermostat fan setting; it should be set to 'Auto' rather than 'On'. If the blower continues to run, it may indicate an issue with the limit switch that should be checked by a professional.

How often should the air filter be replaced in the Tempstar F96CTN furnace?

The air filter should be checked monthly and replaced every 1-3 months, depending on usage and environmental conditions.

What are the signs that indicate the furnace may need repair?

Signs include unusual noises, frequent cycling, uneven heating, a yellow pilot light, and increased energy bills. If you notice any of these signs, it's advisable to contact a service technician.

How can I improve the energy efficiency of my Tempstar F96CTN furnace?

Regular maintenance, sealing ductwork, using a programmable thermostat, and keeping vents and registers unobstructed can improve efficiency. Additionally, ensure your home is well-insulated.

What should I do if the furnace is making unusual noises?

Unusual noises can indicate a problem. Check for loose panels and ensure the furnace is clean. If the noise persists, it could be a sign of mechanical issues that require professional inspection.

Is it normal for the Tempstar F96CTN furnace to emit odors when first turned on?

It is common for a slight burning smell to occur when the furnace is first turned on after a long period of inactivity, as dust on the heat exchanger burns off. Persistent or unusual odors should be investigated by a professional.

What safety precautions should be taken when operating the Tempstar F96CTN furnace?

Ensure proper ventilation, keep flammable materials away from the furnace, and regularly check for gas leaks. It is also advisable to have carbon monoxide detectors installed in your home.

How do I reset the Tempstar F96CTN furnace after a power outage?

Locate the reset button on the furnace, usually found near the blower motor. Press and hold the button for about 30 seconds and then release it. If the furnace does not restart, consult the user manual or contact a technician.