NuTone KG7S High Efficiency Upflow/Horizontal and Downflow Gas Furnaces Owner’s Manual

TECHNICAL SPECIFICATIONS
Owner’s Manual

KG7S High Efficiency Upflow/Horizontal and Downflow Gas Furnaces

KG7S (A and K Series)
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 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 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: Allunitsandeachcomponent are tested on the manufacturing line.

• Best packaging in the industry: Unique corner post designassuresproductwillarrivetothehomeownerdent free.

• Low Boy Height:Easytoapplyinlowceilingapplications, workswellwithtallerhighSEERcoils,easiertohandle and install.

• Tubular primary heat exchanger: Heavy gauge aluminized steel heat exchanger assures a long life.

• 30 second blower delay at start-up:Assuresawarm ducttemperatureatfurnacestart-up.Adjustableblower off settings (60, 90, 120 and 180 seconds).

• 30 second post purge: Increases life of heat exchanger.

• Hot surface ignitor: Innovative application of an appliancetypeignitorwitha20yearhistoryofreliability.
  Utilizes proven Smartlite® technology.

• Color coded wire harness: Designed to fit the components,allwithquick-connectfittingsforeaseof service and replacement.

• High static blowers:Allmodelsequippedwithhighstatic blowers.

• 90 second cooling cycle blower-off delay (TDR): increases cooling performance when matched with a NORDYNE coil.

• Flexible category I venting system: May be vented withdedicatedventingsystemorcommonventedwith other category one appliances.

• High efficiency blower kits: Maximizeefficiencies.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.

• LP convertible:Simpleburnerorificeandregulatorspring 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 otherfaultcodeswitheasytorecognizestateswithout counting flashes.

• Integrated control board: Incorporatesconnectionsfor electronic air cleaner and humidifier.

• Two piece door design: Enhancesfurnaceappearance and uses captured screws to prevent loosing door screws.

GAS FURNACE COMPONENTS

DIMENSIONS

*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

KG7SA 80+ High Efficiency Upflow/Horizontal 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

KG7SK 80+ High Efficiency Downflow Series

BLOWER PERFORMANCE – KG7SA ( ) Can be C or N

• Factory Set Cooling Speed
  Factory Set Heating Speed
  NOTES:**

  1. Two openings are recommended for airflows above 1600 CFM if filter(s) is(are) adjacent to furnace.
  2. Temperature rises in the table are approximate. Actual temperature rises may vary.
  3. Temperature rises shaded in gray are for reference only. These conditions are not recommended.

BLOWER PERFORMANCE – KG7SK ( ) Can be C or N

• Factory Set Cooling Speed
  Factory Set Heating Speed
  NOTES:**

  1. Temperature rises in the table are approximate. Actual temperature rises may vary.
  2. Temperature rises shaded in gray are for reference only. These conditions are not recommended.

MODEL IDENTIFICATION CODE

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| 13.75| 13.75
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| 35-65| 35-65| 35-65| 35-65| 40-70| 40-70
Shipping Weights| 100lbs| 100lbs| 110lbs| 115lbs| 115lbs| 120lbs| 125lbs| 145lbs
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| 3/4 – 4 – PSC| 1.0 – 4 -PSC
Motor FLA| 4.80| 8.20| 8.20| 13.75| 13.75
Rated Ext. SP – In. W.C.| 0.5| 0.5| 0.5| 0.5| 0.5
Temperature Rise Range – ºF| 30-60| 35-65| 35-65| 40-70| 40-70
Shipping Weights| 100lbs| 110lbs| 115lbs| 125lbs| 145lbs

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 (11/2012)
739C-1112 (Replaces 739C-0211)

www.nutonehvac.com
NuTone® trademark used under license.
© Nortek Global HVAC, LLC. All Rights Reserved.

References

• TCPDF

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