KG7S Series High Efficiency Upflow Horizontal Downflow Gas
Owner’s Manual
TECHNICAL SPECIFICATIONS
High Efficiency Upflow/Horizontal and Downflow Gas Furnaces
Induced Draft – 80+ AFUE Input 45,000 – 126,000 Btuh
The high efficiency gas furnace may be installed freestanding in a utility room, basement, or enclose din an alcove or closet. The rounded corner jacket provides a pleasing “appliance appearance.” Design certified by CSA for application in the United States and Canada. 
WARRANTY
- 10-year all-parts warranty.
- 1 Year Quality Pledge to replace the unit if the heat exchanger fails within the first year of operation, to the original owner.
- Consumer product registration required for 10 year All Parts Warranty and Quality Pledge within a limited period of time after the installation. See current warranty document or visit our consumer web site listed on the back of this document for warranty details.
- When registered, this product is upgraded to a limited lifetime heat exchanger warranty.
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.
- LowBoy 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 ignitor: Innovative application of an appliance type ignitor with a 20 year history of reliability. 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.
- 90 second cooling cycle blower-off delay (TDR): increases cooling performance when matched with a NORDYNE coil.
- Flexible category | venting system: May be vented with dedicated venting system or common vented with other category one appliances.
- High efficiency blower kits: Maximize efficiencies. On select units, a SEER improvement of up to 1 point is realized.
- Multi-speed direct drive blower: Designed to give a wide range of cooling capacities. Switches on PCB, provide ultra easy motor speed selection.
- Convertible: Simple bummer orifice and regulator spring change for ease of convertibility.
- Diagnostic lights for easy troubleshooting without counting flashes: Dedicated light for flame signal strength and 2 lights in combination to indicate all other fault codes with easy to recognize states without counting flashes.
- Integrated control board: Incorporates connections for electronic air cleaner and humidifier.
- Two piece door design: Enhances furnace appearance and uses captured screws to prevent loosing door screws.
GAS FURNACE COMPONENTS
DIMENSIONS
KG7SA 80+ High Efficiency Upflow/Horizontal Series
BLOWER PERFORMANCE – KG7SA
AIRFLOW DATA
BLOWER PERFORMANCE – KG7SA Continued
NOTES:
* Factory Set Cooling Speed
** Factory Set Heating Speed
- Two openings are recommended for airflows above 1,600 CFM if filter(s) is(are) adjacent to furnace
- Temperature rises in the table are approximate. Actual temperature rises may vary.
- Temperature rises shaded in gray are for reference only. These conditions are not recommended.
Table 3. Continued
BLOWER PERFORMANCE – KG7SK
NOTES:
* Factory Set Cooling Speed
** Factory Set Heating Speed
- Temperature rises in the table are approximate. Actual temperature rises may vary.
- Temperature rises shaded gray are for reference only. These conditions are not recommended.
Table 4. Maximum Airflow & Temperature Rises (° F) – Downflow Furnaces
SPECIFICATIONS
| KG7SA MODEL NUMBERS | -045-23A | -054-23A | -072-24B | -090-24B | -072-35C | -090-35C | -108-35C | -126-45D |
| Input – Btuh (a) | 45,000 | 54,000 | 72,000 | 90,000 | 72,000 | 90,000 | 108,000 | 126,000 |
| Heating Capacity – Btuh | 36,000 | 43,200 | 57,600 | 72,000 | 57,600 | 72,000 | 86,400 | 100,800 |
| AFUE | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 |
| Blower D x W | 10 x 6 | 10 x 6 | 11 x 8 | 11 x 8 | 10 x 10 | 10 x 10 | 11 x 10 | 11 x 10 |
| Motor H.P. – Speed – Type | 1/3 – 4 – PSC | 1/3 – 4 – PSC | 1/2 – 4 – PSC | 1/2 – 4 – PSC | 1/2 – 4 – PSC | 1/2 – 4 – PSC | 1.0 – 4 – PSC | 1.0 – 4 – PSC |
| Motor FLA | 4.80 | 4.80 | 8.20 | 8.20 | 7.50 | 7.50 | 14. | 14. |
| 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 – °F | 30-60 | 30-60 | 35-65 | 35-65 | 35-65 | 35-65 | 40-70 | 40-70 |
| Shipping Weights | 100Ibs | 100Ibs | 110Ibs | 115Ibs | 115Ibs | 120Ibs | 125Ibs | 1451bs |
| KG7SK MODEL NUMBERS | -054-23A | -072-24B | -090-24B | -108-35C | -126-45D |
| Input – Btuh (a) | 54,000 | 72,000 | 90,000 | 108,000 | 126,000 |
| Heating Capacity – Btuh | 43,200 | 57,600 | 72,000 | 86,400 | 100,800 |
| AFUE | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 |
| Blower D x W | 10 x 6 | 11 x 8 | 11 x 8 | 11 x 10 | 11 x 10 |
| Motor H.P. – Speed – Type | 1/3 – 4 – PSC | 1/2 – 4 – PSC | 1/2 – 4 – PSC | 1.0 – 4 – PSC | 1.0 – 4 -PSC |
| Motor FLA | 4.80 | 8.20 | 8.20 | 14. | 14. |
| Rated Ext. SP – In. W.C. | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Temperature Rise Range – °F | 30-60 | 35-65 | 35-65 | 40-70 | 40-70 |
| Shipping Weights | 100Ibs | 110Ibs | 115Ibs | 1251bs | 1451bs |
ACCESSORIES
| KG7S (A, K) KITS | |
| Description | SKU |
| “A”Cabinet fixed speed, high efficiency, FSHE | 904872 |
| “B”Cabinet fixed speed, high efficiency, FSHE | 904873 |
| “C”Cabinet fixed speed, high efficiency, FSHE | 904874 |
| “D”Cabinet fixed speed, high efficiency, FSHE | 904875 |
| “A”Cabinet variable speed, high efficiency, VSHE | 904876 |
| “B”Cabinet variable speed, high efficiency, VSHE | 904877 |
| “C”Cabinet variable speed, high efficiency, VSHE | 904878 |
| “D”Cabinet variable speed, high efficiency, VSHE | 904879 |
| “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.) | 905028 |
| Canada LP Conversion kit (0 to 4,500 ft.) | 905029 |
| Bottom return filter 20 per box, “A” cabinet | 903088A |
| Bottom return filter 20 per box, “B” cabinet | 904916 |
| Bottom return filter 20 per box, “C” cabinet | 904917 |
| Bottom return filter 20 per box, “D” cabinet | 904918 |
| Side return filter kit | 541036 |
GENERAL TERMS OF LIMITED WARRANTY
NORDYNE will furnish a replacement for any part of this product which fails in normal use and service within the first ten years of installation, in accordance with the terms of the warranty.
For complete details of the Limited Warranty, including applicable terms and conditions, see your local installer or contact the NORDYNE warranty department for a copy.
8000 Phoenix Parkway | O’Fallon, MO 63368-3827
Specifications and illustrations subject to change without notice and without incurring obligations. Printed in U.S.A (07/2013)
739C-0713 (Replaces 739C-1112)
www.nutonehvac.com
NuTone® trademark used under license. © Nortek Global HVAC, LLC. All Rights Reserved.
Documents / Resources
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