NuTone KG8SA Ultra Low NOx Series Single Stage Furnaces Instruction Manual
- June 15, 2024
- NuTone
Table of Contents
NuTone KG8SA Ultra Low NOx Series Single Stage Furnaces
Product Information
The product is an 80% Ultra-Low NOx Series Single Stage Furnace designed for residential heating and cooling applications. It operates on 120 Volt / 1 Ph. / 60 Hz electrical supply. Please refer to the Installation Instructions provided with the furnace for proper installation and setup.
Specifications
| Component | Color |
|---|---|
| Roll-out Limit | Blue |
| Supply Air Limit | Blue |
| Pressure Switch | Orange |
| Flame Sensor | Yellow |
| Gas Valve | Red |
| Single Stage Thermostat | Blue |
Product Usage Instructions
Wiring Diagram
To ensure proper wiring, refer to the provided wiring diagram. Use copper
conductors only and replace any original wiring with material having a
temperature rating of at least 105°C.
Field Wiring
- Low Voltage : Use black, white, red, green, and gray wires as indicated in the diagram.
- High Voltage : Use black and white wires for a 120V power supply. Ensure proper grounding with a green wire.
Connections
Make the following connections based on the wiring diagram:
- Connect the neutral (white) wire to the corresponding terminal.
- Connect the hot (black) wire to the designated 120V ground terminal.
- Connect the low-voltage wires (black, white, red, green, and gray) to their respective terminals as shown in the diagram.
Fault Conditions
The furnace has built-in diagnostic LEDs to indicate fault conditions. Here
are the possible fault conditions and their corresponding LED indications:
Diagnostic LED Indicators
| Condition | Green LED | Red LED | Yellow LED |
|---|---|---|---|
| Control Fault (No Power) | Off | Off | |
| L1 / Neutral Polarity Fault | Flash | Flash | |
| 1 Hour Lockout | Alternating Flash | Alternating Flash | |
| Normal Operation | On | On | |
| Pressure Switch Closed Fault | On | Flash | |
| Pressure Switch Open Fault | Flash | On | |
| Open Limit Switch Fault | Flash | Off | |
| Low Flame Sensor Signal | Continuous Flash | ||
| Flame Present | On |
Legend
Field Wiring
- Low Voltage
- High Voltage
White (Neutral)
- Black 120V Ground
Neutrals
- Red
- Gray
Document Information
Powered by TCPDF (www.tcpdf.org)
- Document Number: 1027409A
- Date: 08/19
Wire Replacement Notice
If any of the original wire as supplied with the furnace must be replaced,
it must be replaced with wiring material having a temperature of at least 105
C. Use copper conductors only.
WIRING DIAGRAM
For 80% Ultra-Low NOx Series Single Stage Furnaces
Refer to the Installation Instructions provided with the furnace for the
proper heating and cooling speeds for your application.
If any of the original wires as supplied with the furnace must be replaced, it must be replaced with wiring material having a temperature of at least 105 C. Use copper conductors only.
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Frequently Asked Questions
Where can I find more information about the wiring diagram?
For more information, you can visit the Nutone HVAC website
atwww.nutonehvac.com or refer to the TCPDF
documentation at www.tcpdf.org.
What should I do if I need to replace the original wiring?
any of the original wires supplied with the furnace need replacement, make sure to use wiring material with a temperature rating of at least 105°C. Use copper conductors only for proper electrical conductivity.
How do I connect the low-voltage wires?
Follow the provided wiring diagram and connect the low-voltage wires black, white, red, green, and gray to their respective terminals as indicated. Ensure proper connections for smooth operation.
What do the LED indications mean?
The furnace has built-in diagnostic LEDs to indicate various fault conditions. Refer to the table in the product usage instructions section for a detailed description of each LED indication and its corresponding fault condition. For 80% Ultra-Low NOx Series Single Stage Furnaces 120 Volt / 1 Ph. / 60 Hz. Refer to the Installation Instructions provided with the furnace for the proper heating and cooling speeds for your application.
What should I refer to before wiring?
Refer to the Installation Instructions provided with the furnace for the proper heating and cooling speeds for your application.
What type of conductors should be used if the original wire needs replacement?
Use copper conductors with a temperature rating of at least 105 C.
How can I interpret the diagnostic LED indicators?
Refer to the Diagnostic LED Indicators table for a description of the LED signals corresponding to various fault conditions.
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>