NuTone G7S Gas Furnace Owner’s Manual
- June 15, 2024
- NuTone
Table of Contents
NuTone G7S Gas Furnace
Product Information
Technical Specifications
- Product Name: G7S (A and K Series) Gas Furnaces
- Type: Single Stage Upflow/Horizontal and Downflow
- Induced Draft – 80+ AFUE Input 45,000 – 126,000 Btuh
- Installation: Can be installed free-standing in a utility room, basement, or enclosed in an alcove or closet
- Certification: Design certified by CSA for application in Canada and the United States
Features and Benefits
- Rounded corner jacket for pleasing appliance appearance
- Approved and certified by the SCAQM and the SJVAPC Districts in the state of California
- Meets Mitigation Fee Plan for shipment into and sales in both districts
- Not eligible for the Clean Air Furnace Rebate Program in SCAQMD
Gas Furnace Components
- Blower Assembly
- Blower Door Switch
- Burner Assembly
- Control Board
- Flame Sensor
- Gas Manifold
- Gas Valve
- Igniter
- Inducer
- Insulated Combustion Tube (Downflow Models)
- Low Voltage Transformer
- Main Air Limit Switch
- Pressure Switch
- Roll-Out Switch(s)
Model Identification Code
Gas Furnace Design Series:
- S = Single Stage
- T = Two Stage
- M = Modulating
Product Usage Instructions
Installation
The gas furnace can be installed in the following locations:
- Utility room
- Basement
- Enclosed alcove or closet
Ensure that the installation is done according to local regulations and guidelines.
Free-Standing Installation
- If installing the gas furnace as a free-standing unit, ensure that it is placed on a level and stable surface.
- Leave adequate space around the furnace for proper ventilation and access for maintenance.
Enclosed Installation
- If installing the gas furnace in an enclosed space such as an alcove or closet, ensure that the space is properly ventilated to prevent buildup of exhaust gases.
- Follow local building codes and guidelines for ventilation requirements.
Gas Furnace Operation
To operate the gas furnace:
- Ensure that the gas supply is turned on and the furnace is connected to a reliable power source.
- Set the desired temperature on the thermostat.
- The furnace will automatically ignite and start heating the air.
- The blower fan will circulate the heated air throughout the designated area.
- The furnace will continue to operate until the desired temperature is reached or the thermostat setting is adjusted.
Maintenance and Cleaning
Regular maintenance and cleaning of the gas furnace is important to ensure optimal performance and longevity. Follow the manufacturer’s guidelines for maintenance tasks such as filter replacement, lubrication, and inspection of components. Keep the area around the furnace clean and free from debris to prevent any obstruction to the airflow.
FAQ
- Q: Is the gas furnace eligible for the Clean Air Furnace Rebate Program?
- A: No, this furnace is not eligible for the Clean Air Furnace Rebate Program. Please visit www.CleanAirFurnaceRebate.com for more information.
- Q: Can the gas furnace be installed in California?
- A: Yes, this furnace series is approved and certified by the SCAQM and the SJVAPC Districts in the state of California. However, for installations in SCAQMD only, this furnace does not meet the SCAQMD Rule 1111 NOx emission limit and is subject to a mitigation fee of up to $450.
Single Stage Upflow/Horizontal and Downflow Gas Furnaces
- Induced Draft: – 80+ AFUE
- Input: 45,000 – 126,000 Btuh
The gas furnace may be installed free standing in a utility room, basement, or enclosed in an alcove or closet. The rounded corner jacket provides a pleasing “appliance appearance.” Design certified by CSA for application in Canada and the United States.
This furnace series is approved and certified by the SCAQM and the SJVAPC
Districts in the state of California under each Districts’ Mitigation Fee Plan
for shipment into and sales in both districts.
For California installations in SCAQMD only: This furnace does not meet
the SCAQMD Rule 1111 NOx emission limit (14 ng/J), and thus is subject to a
mitigation fee of up to $450. This furnace is not eligible for the Clean Air
Furnace Rebate Program:
www.CleanAirFurnaceRebate.com.
FEATURES and BENEFITS
- 100% fired and tested: All units and each component are tested on the manufacturing line.
- Best packaging in the industry: Unique corner post design assures product will arrive to the homeowner dent free.
- Low Boy Height: Easy to apply in low ceiling applications, works well with taller high SEER coils, easier to handle and install.
- Tubular primary heat exchanger: Heavy gauge aluminized steel heat exchanger assures a long life.
- 30 second blower delay at start-up: Assures a warm duct temperature at furnace start-up. Adjustable blower off settings (60, 90, 120 and 180 seconds).
- 30 second post purge: Increases life of heat exchanger.
- Hot surface igniter: Innovative application of a silicon nitride igniter. Utilizes proven Smartlite® technology.
- Color coded wire harness: Designed to fit the components, all with quick-connect fittings for ease of service and replacement.
- High static blowers: All models equipped with high static blowers.
- 60 second cooling cycle blower-off delay (TDR): increases cooling performance when matched with a Nortek Global HVAC coil.
- Flexible category I venting system: May be vented with dedicated venting system or common vented with other category one appliances.
- Multi-speed direct drive blower: Energy-efficient, brushless DC (ECM). Designed to give a wide range of cooling capacities. Dip switches on PCB provide easy motor speed selection.
- LP convertible: Simple burner orifice and regulator spring change for ease of convertibility.
- Integrated control board: Incorporates connections for electronic air cleaner and humidifier. Ergonomically located for ease of service.
- Two piece door design: Enhances furnace appearance and uses captured screws to prevent losing door screws.
- Blower Compartment: Insulated for ultra quiet operation.
- Furnace Air Leakage: These furnaces comply with Energy Star cabinet air leakage requirement of less than or equal to 2%. Keep the conditioned air flowing to where it’s needed.
GAS FURNACE COMPONENTS
- Blower Assembly
- Blower Door Switch
- Burner Assembly
- Control Board
- Flame Sensor
- Gas Manifold
- Gas Valve
- Igniter
- Inducer
- Insulated Combustion Tube (Downflow Models)
- Low Voltage Transformer
- Main Air Limit Switch
- Pressure Switch
- Roll-Out Switch(s)
DIMENSIONS
G7SA Single Stage Upflow/Horizontal Series
*SA Model #’s| Dimension “A”| Dimension “B”| Dimension “C”|
Dimension “D”
---|---|---|---|---
045-23A| 14 1/4| 10 3/4| 12 5/8| 12 7/8
054-23A
072-24B| 17 1/2| 11 3/4| 15 7/8| 16 1/8
090-24B
072-35C| ****
21
| ****
14
| 19 3/8| 19 7/8
090-35C
108-35C
126-45D| 24 1/2| 15 1/4| 22 7/8| 23 1/8
G7SK Single Stage Downflow Series
*SK Model #’s| Dimension “A”| Dimension “B”| Dimension “C”|
Dimension “D”
---|---|---|---|---
054-23A| 14 1/4| 10 3/4| 12 5/8| 12 7/8
072-24B| 17 1/2| 11 3/4| 15 7/8| 16 1/8
090-24B
108-35C| 21| 14| 19 3/8| 19 5/8
126-45D| 24 1/2| 15 1/4| 22 7/8| 23 1/8
MODEL IDENTIFICATION CODE
SPECIFICATIONS
G7SA MODEL NUMBERS| -045-T23A1| -054-T23A1| -072-T24B1| -072-T35C1|
-090-T24B1| -090-T35C1| -108-T35C1| -126-T45D1
---|---|---|---|---|---|---|---|---
Input – Btuh (a)| 45,000| 52,000| 70,000| 75,000| 90,000| 85000| 108000|
122000
Heating Capacity – Btuh| 36,000| 42,000| 56,000| 60,000| 72,000| 68000| 86000|
98000
AFUE| 80.0| 80.0| 80.0| 80.0| 80.0| 80| 80| 80
Motor H.P. – Speed – Type| 1/2 – 5 – ECM| 1/2 – 5 – ECM| 3/4 – 5 – ECM| 3/4 –
5 – ECM| 3/4 – 5 – ECM| 3/4-5-ECM| 1-5-ECM| 1-5-ECM
Motor FLA| 6.4| 6.4| 8.8| 8.8| 8.8| 8.8| 11.5| 11.5
Rated Ext. SP – In. W.C.| 0.5| 0.5| 0.5| 0.5| 0.5| 0.5| 0.5| 0.5
Temperature Rise Range – ºF| 30-60| 30-60| 30-60| 35-65| 35-65| 35-65| 35-65|
40-70
Shipping Weights| 95 lbs| 95 lbs| 110 lbs| 115 lbs| 115 lbs| 134 lbs| 136 lbs|
147 lbs
| G7SK MODEL NUMBERS | -054C-T23A1 | -072-T24B1 | -090-T24B1 |
|---|---|---|---|
| Input – Btuh (a) | 54,000 | 72,000 | 90,000 |
| Heating Capacity – Btuh | 43,000 | 58,000 | 72,000 |
| AFUE | 80.0 | 80.0 | 80.0 |
| Motor H.P. – Speed – Type | 1/2 – 5 – ECM | 3/4 – 5 – ECM | 3/4 – 5 – ECM |
| Motor FLA | 6.4 | 8.8 | 8.8 |
| Rated Ext. SP – In. W.C. | 0.5 | 0.5 | 0.5 |
| Temperature Rise Range – ºF | 30-60 | 35-65 | 35-65 |
| Shipping Weights | 102 lbs | 110 lb | 115 lb |
ACCESSORIES
G7S(A,K) KITS
Description| SKU
“A” Cabinet downflow sub base kit| 902974
“B”, “C”, “D” Cabinet downflow sub base kit| 904911
U.S. LP Conversion kit (0 to 10,000 ft.) and High Altitude LP| 905028
Canada LP Conversion kit (0 to 4,500 ft.) and High Altitude LP| 905029
Side return filter kit| 541036
Furnace Twinning Kit| 1010035
LIMITED WARRANTY
GENERAL TERMS OF LIMITED WARRANTY
- Nortek Global HVAC, LLC will furnish a replacement for any part of this product which fails in normal use and service within the terms and conditions of the warranty.
- For complete details of the Limited Warranty, including applicable terms and conditions, see your local installer or contact the Nortek Global HVAC, LLC warranty department for a copy.
Before purchasing this appliance, read important energy cost and efficiency information available from your retailer. Specifications and illustrations subject to change without notice and without incurring obligations. Printed in U.S.A (04/2022)
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NuTone® trademark used under license. © Nortek Global HVAC, LLC. All Rights
Reserved.
References
Read User Manual Online (PDF format)
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