Contents

Owners Manual
- 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.
- STARTING YOUR FURNACE
  - Fig. 5 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. 6).
  - Fig. 6 Lowest Temperature Setting
    - 2. Close the external manual gas valve (see Fig. 7).
  - Fig. 7 Close Valve
    - 3. Turn OFF electrical supply to the furnace (see Fig. 8).
  - Fig. 8 Turn Off Electrical Supply
    - 4. Remove the main furnace door (see Fig. 9).
  - Fig. 9 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. 10). 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. 10 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. 11).
  - Fig. 11 Control Switch to ON
    - 7. Replace main furnace door (see Fig. 12).
  - Fig. 12 Furnace Door Replaced (Upflow Configuration)
    - 8. Turn ON the electrical supply to the furnace and wait one minute (see Fig. 13).
  - Fig. 13 Turn on Electrical Supply
    - 9. Open the external manual gas valve (see Fig. 14).
  - Fig. 14 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. SUGGESTION: Setting the thermostat back a few degreesand compensating for the difference with warmer clothingcan make a big difference in your fuel consumption...
- SHUTTING DOWN YOUR FURNACE
  - 1. Set your room thermostat to the lowest temperature setting and set the MODE to OFF (see Fig. 15).
  - Fig. 15 Lowest Temperature Setting
    - 2. Close the external manual gas valve (see Fig. 16).
  - Fig. 16 Close the External Manual Valve
    - 3. Turn off electrical supply to the furnace (see Fig. 17).
  - Fig. 17 Turn Off Electrical Supply
    - 4. Remove main furnace door (see Fig. 9).
    - 5. Turn control switch on the gas control to OFF position (see Fig. 10).
    - 6. Replace main furnace door (see Fig. 12).
    - 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
- PERFORMING ROUTINE MAINTENANCE
- FILTERING OUT TROUBLE
  - 1. Turn off electrical supply to the furnace (see Fig. 18).
  - 2. Remove air filter from the filter cabinet.
  - a. Remove filter cabinet door (see Fig. 19 and Fig. 20).
  - b. Slide air filter out of furnace. Keep dirty side up (if dirty) to avoid spilling dirt (see Fig. 21 and Fig. 22).
  - 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. 18 Turn Off Electrical Supply
  - Table 1 Filter Size Information
- COMBUSTION AREA AND VENT SYSTEM
  - 1. Turn off electrical supply and gas supply to the furnace and remove the main furnace door (see Fig. 6, Fig. 7, Fig. 8, Fig. 9, and Fig. 10).
  - 2. Inspect the gas burner area for dirt, rust, soot or scale.
  - 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. If you observe a suspected malfunction, call your dealer.
  - 6. Replace main furnace door.
- 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. 19).
  - 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. 19 Winterizing Furnace
- A CHECK-UP CHECKLIST
  - Fig. 20 Information Booklet Location
- BEFORE YOU REQUEST A SERVICE CALL
  - For insufficient airflow:
  - If furnace fails to operate:
- A200102
  - MAINTENANCE CHECKLIST

Tempstar N95ESU Owner's Manual

Tempstar N95ESU Gas Furnace manual cover

Pages 10

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Tempstar N95ESU Gas Furnace Specification

The Tempstar N95ESU gas furnace is designed to deliver reliable and efficient heating with its sophisticated engineering and advanced features. At the core of its operation is an efficient single-stage gas valve, ensuring consistent heat delivery while optimizing fuel usage. The furnace boasts an Annual Fuel Utilization Efficiency (AFUE) rating of up to 96%, signifying its ability to convert a substantial portion of fuel into usable heat, reducing energy waste and lowering utility bills.

The unit is equipped with a multi-speed blower motor that enhances comfort by allowing for more precise airflow control, adapting to the specific heating requirements of the space. This feature not only improves comfort but also contributes to the efficient operation of the furnace, aligning with its energy-saving design. The N95ESU includes a durable primary heat exchanger made from corrosion-resistant materials, designed to ensure longevity and reliable performance even under demanding conditions.

In terms of installation and maintenance, the furnace features a compact design, making it suitable for various residential applications and facilitating easier integration into existing HVAC systems. The N95ESU supports enhanced diagnostic capabilities with its user-friendly control interface, allowing for straightforward troubleshooting and servicing. Safety is also a priority, with integrated safety features that include a reliable electronic ignition system and robust construction to prevent leaks and other potential hazards.

Overall, the Tempstar N95ESU gas furnace is engineered for efficiency and reliability, providing homeowners with a dependable heating solution that prioritizes energy conservation, comfort, and ease of use, making it an ideal choice for modern residential heating needs.

Tempstar N95ESU Gas Furnace F.A.Q.

How do I reset the Tempstar N95ESU gas furnace?

To reset the Tempstar N95ESU gas furnace, turn off the power supply to the furnace. Wait for about 5 minutes, and then restore power. This will reset the control board.

What should I do if my Tempstar N95ESU furnace is not heating properly?

Check the thermostat settings to ensure it is set to "heat" and the temperature is set higher than the current room temperature. Also, inspect the air filter and replace it if it's dirty or clogged.

How often should I replace the air filter in my Tempstar N95ESU furnace?

It is recommended to replace the air filter every 1 to 3 months, depending on usage and the type of filter. Regular replacement ensures optimal efficiency and air quality.

What are common error codes for the Tempstar N95ESU gas furnace and their meanings?

Common error codes include E1 for ignition failure, E2 for pressure switch problems, and E3 for a flame sensor issue. Refer to the manual for a complete list and troubleshooting steps.

Why does my Tempstar N95ESU furnace frequently cycle on and off?

Frequent cycling can be caused by a clogged air filter, thermostat issues, or improper airflow. Ensure the air filter is clean and the thermostat is functioning correctly.

How can I improve the efficiency of my Tempstar N95ESU furnace?

To improve efficiency, regularly clean or replace air filters, schedule annual maintenance, and ensure that your home is properly insulated.

What maintenance should I perform annually on my Tempstar N95ESU furnace?

Annual maintenance should include inspecting the heat exchanger, cleaning the burners, checking the blower motor, and ensuring all connections are secure.

How do I troubleshoot a Tempstar N95ESU furnace that won't start?

Ensure the thermostat is set correctly, check power supply, inspect the fuse or circuit breaker, and verify that the gas valve is open. If issues persist, contact a professional.

Why is my Tempstar N95ESU furnace making unusual noises?

Unusual noises can indicate loose components, a dirty burner, or issues with the blower motor. Inspect the furnace and tighten any loose parts or call a technician for complex issues.

What should I do if the Tempstar N95ESU furnace's pilot light goes out?

If the pilot light goes out, follow the manufacturer's instructions to relight it. If it won't stay lit, there may be a problem with the thermocouple or gas supply.