Literature Library FG7S Gas Furnace Owner’s Manual

Literature Library FG7S Gas Furnace

Technical Specifications

• Model: FG7S (D and M Series)
• Type: High Efficiency, Single Stage Condensing, Upflow/Horizontal and Downflow Gas Furnace
• AFUE: 95.0
• Input: 38,000 – 120,000 Btuh

Features and Benefits

• Flame Sensor
• Finish Flange
• Roll-Out Switch
• Main Air Limit Switch
• Inducer Limit Switch
• Pressure Switch (Inducer)
• Inducer Assembly
• Blower Door Switch
• Burner Assembly
• Igniter
• Gas Valve
• Furnace Control Board
• Pressure Switch (Condensate)
• Transformer
• Blower Assembly

Dimensions

SD Upflow / Horizontal Furnaces

SM Downflow Furnaces

Product Usage Instructions

Installation
The high-efficiency upflow gas furnace can be installed free-standing in a utility room, basement, or enclosed in an alcove or closet. Upflow/horizontal units come ready for upflow or horizontal application. The extended flush jacket provides a pleasing appliance appearance. Design certified by CSA for application in Canada and the United States.

Gas Furnace Components

• Flame Sensor
• Finish Flange
• Roll-Out Switch
• Main Air Limit Switch
• Inducer Limit Switch
• Pressure Switch (Inducer)
• Inducer Assembly
• Blower Door Switch
• Burner Assembly
• Igniter
• Gas Valve
• Furnace Control Board
• Pressure Switch (Condensate)
• Transformer
• Blower Assembly

BLOWER PERFORMANCE – FG7SD

Model Number & Heating Input (Btuh)| Motor Speed| External Static Pressure (Inches Water Column)| CFM Rise
---|---|---|---
SD038D-24B BottomReturn (38,000)| HIGH*| 0.1| 1519
SD038D-24B SideReturn (38,000)| MED-H**| 0.2| 1483

Frequently Asked Questions (FAQ)

• Q: Where can the high-efficiency upflow gas furnace be installed?
  A: The high-efficiency upflow gas furnace can be installed free-standing in a utility room, basement, or enclosed in an alcove or closet.

• Q: What is the AFUE rating of the gas furnace?
  A: The AFUE rating of the gas furnace is 95.0.

• Q: What are the dimensions of the SD Upflow / Horizontal Furnaces?
  A: The dimensions of the SD Upflow / Horizontal Furnaces vary depending on the model. Please refer to the specifications section for detailed dimensions.

• Q: What are the components of the gas furnace?
  A: The gas furnace includes components such as a flame sensor, finish flange, roll-out switch, main air limit switch, inducer limit switch, pressure switch (inducer), inducer assembly, blower door switch, burner assembly, igniter, gas valve, furnace control board, pressure switch (condensate), transformer, and blower assembly.

TECHNICAL SPECIFICATIONS

FG7S (D and M Series)

• High Efficiency, Single Stage
• Condensing, Upflow/Horizontal and
• Downflow Gas Furnace Models 95.0 AFUE 38,000 – 120,000 Btuh Input
• The high efficiency upflow gas furnace may be installed free standing in a utility room, basement, or enclosed in an alcove or closet. Upflow/horizontal units come ready for upflow or horizontal application. The extended flush jacket provides a pleasing “appliance appearance.” Design certified by CSA for application in Canada and the United States.

WARRANTY

• 10-year all-parts warranty.
• 10 Year Quality Pledge to replace the unit if the heat exchanger fails within the first 10 years 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.
• 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 type 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.
• Flexible category IV venting system: May be vertically or horizontally vented using either a one-pipe or two-pipe system for maximum flexibility in installation.
• High Static Blowers: All models equipped with high static blowers.
• 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 and stainless steel secondary heat exchanger assures a long life.
• 60 second fixed cooling cycle blower-off delay (TDR) increases cooling performance when matched with a NORDYNE coil.
• 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.
• LP convertible: Simple burner 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.
• Incorporates integrated control board with connections for electronic air cleaner and humidifier.
• Two piece door design enhances furnace appearance and uses captured screws to prevent losing door screws.
• Blower Compartment: Sealed door to reduce air leakage and insulated for ultra quiet operation.
• Sealed Vestibule reduces burner and inducer sound levels.

GAS FURNACE COMPONENTS

DIMENSIONS

BLOWER PERFORMANCE – FG7SD

*SD – UPFLOW / HORIZONTAL FURNACES|
---|---
Model Number &

Heating Input (Btuh)

| Motor Speed| External Static Pressure (Inches Water Column)|
0.1| 0.2| 0.3| 0.4| 0.5| 0.6| 0.7| 0.8|
CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise|
| HIGH *****| 1519| 21| 1483| 22| 1433| 22| 1397| 23| 1335| 24| 1272| 25| 1214| 26| 1130| 27|
SD038D-24B

Bottom Return (38,000)

| MED-H **

MED-L

| 1238

1094

| 28| 1216

1082

| 28| 1188

1052

| 28| 1164

1034

| 29| 1136

1021

| 30

34

| 1092

977

| 31

34

| 1043

928

| 32

36

| 973

865

| 34

37

|
31| 32| 32| 33|
| LOW| 841| 40| 817| 42| 801| 43| 786| 45| 750| 46| 720| 48| 683| 49| 639| 53|
| HIGH *****| 1664| 18| 1631| 21| 1596| 21| 1546| 22| 1489| 23| 1433| 24| 1366| 25| 1285| 26|
SD038D-24B

Side Return (38,000)

| MED-H

MED-L **

| 1272

1130

| 26

29

| 1255

1114

| 27| 1249

1100

| 27| 1217

1079

| 28| 1189

1048

| 29| 1145

1025

| 30

33

| 1096

987

| 31

35

| 1036

944

| 33

36

|
31| 31| 31| 33|
| LOW| 869| 39| 839| 42| 809| 42| 790| 44| 764| 45| 739| 47| 711| 48| 664| 52|
| HIGH *| 1519| 33| 1483| 34| 1433| 35| 1397| 36| 1335| 37| 1272| 39| 1214| 41| 1130| 44|
SD054D-24B| MED-H| 1238| 40| 1216| 41| 1188| 42| 1164| 43| 1136| 44| 1092| 46| 1043| 48| 973| 51|
Bottom Return (54,000)| MED-L **| 1094| 46| 1082| 46| 1052| 48| 1034| 48| 1021| 49| 977| 51| 928| 54| 865| 58|
| LOW| 841| 59| 817| 61| 801| 62| 786| 64| 750| 67| 720| 69| 683| 73| 639| 78|
| HIGH *| 1664| 30| 1631| 31| 1596| 31| 1546| 32| 1489| 34| 1433| 35| 1366| 37| 1285| 39|
SD054D-24B

Side Return (54,000)

| MED-H

MED-L **

| 1272

1130

| 39

44

| 1255

1114

| 40

45

| 1249

1100

| 40

45

| 1217

1079

| 41

46

| 1189

1048

| 42

48

| 1145

1025

| 44

49

| 1096

987

| 46

51

| 1036

944

| 48

53

|
| LOW| 869| 58| 839| 60| 809| 62| 790| 63| 764| 65| 739| 68| 711| 70| 664| 75|
| HIGH *****| 1933| 34| 1857| 36| 1780| 37| 1695| 39| 1599| 42| 1498| 45| 1396| 48| 1280| 52|
SD072D-35C

Bottom Return (54,000)

| MED-H **

MED-L

| 1872

1320

| 36

51

| 1804

1299

| 37

51

| 1731

1264

| 39

53

| 1639

1233

| 41

54

| 1551

1183

| 43

56

| 1458

1126

| 46

59

| 1353

1059

| 49

63

| 1237

963

| 54|
69|
| LOW| 1185| 56| 1170| 57| 1132| 59| 1102| 60| 1067| 62| 1015| 66| 947| 70| 856| 78|
| HIGH *****| 1916| 35| 1848| 36| 1773| 38| 1692| 39| 1613| 41| 1515| 44| 1426| 47| 1316| 51|
SD072D-35C

Side Return (54,000)

| MED-H **

MED-L

| 1815

1259

| 37

53

| 1771

1241

| 38

54

| 1711

1224

| 39

54

| 1641

1192

| 41

56

| 1553

1163

| 43

57

| 1468

1115

| 45

60

| 1373

1056

| 49

63

| 1270

982

| 52|
68|
| LOW| 1139| 59| 1120| 60| 1096| 61| 1075| 62| 1047| 64| 1014| 66| 959| 70| 884| 75|
SCD72D-35C

Side + Bottom or 2 Sides

(72,000)

| HIGH * MED-H ** MED-L| 1954

1869

1287

| 34| 1890

1805

1262

| 35

37

53

| 1824

1741

1231

| 37

38

54

| 1741

1685

1197

| 38

40

56

| 1656

1607

1166

| 40

41

57

| 1564

1516

1117

| 43

44

60

| 1470

1419

1061

| 45

47

63

| 1352

1308

966

| 49

51

|
36

52

|
69|
66| 70|
| LOW| 1147| 58| 1115| 60| 1097| 61| 1075| 62| 1047| 64| 1014| 959| 884| 75|
| HIGH *****| 2288| 36| 2236| 37| 2161| 39| 2092| 40| 2017| 41| 1934| 43| 1841| 45| 1748| 48|
SD090D-35C

Bottom Return (90,000)

| MED-H **

MED-L

| 2144

1874

| 39

44

| 2093

1845

| 40

45

| 2049

1806

| 41

46

| 1985

1766

| 42

47

| 1912

1717

| 44

49

| 1842

1661

| 45

50

| 1764

1582

| 47

53

| 1668

1503

| 50

55

|
| LOW| 1541| 54| 1516| 55| 1509| 55| 1486| 56| 1456| 57| 1402| 59| 1361| 61| 1294| 64|
| HIGH *****| 2273| 37| 2222| 38| 2164| 39| 2098| 40| 2025| 41| 1947| 43| 1864| 45| 1780| 47|
SD090D-35C

Side Return (90,000)

| MED-H **

MED-L

| 2084

1784

| 40

47

| 2039

1777

| 41

47

| 2007

1749

| 42

48

| 1955

1725

| 43

48

| 1895

1679

| 44

50

| 1832

1629

| 45

51

| 1750

1576

| 48

53

| 1665

1501

| 50

56

|
| LOW| 1482| 56| 1470| 57| 1444| 58| 1432| 58| 1405| 59| 1375| 61| 1339| 62| 1286| 65|
SCD90D-35C

Side + Bottom or 2 Sides

(90,000)

| HIGH * MED-H ** MED-L| 2328

2124

1825

| 36

39

46

| 2273

2108

1809

| 37

40

46

| 2224

2052

1781

| 37

41

47

| 2151

2018

1752

| 39

41

48

| 2082

1954

1706

| 40

43

49

| 2005

1884

1676

| 42

44

50

| 1920

1813

1615

| 43

46

52

| 1825

1725

1535

| 46

48

54

|
| LOW| 1509| 55| 1488| 56| 1468| 57| 1440| 58| 1422| 59| 1379| 60| 1351| 62| 1292| 64|
*SD – UPFLOW / HORIZONTAL FURNACES|
---|---
Model Number &

Heating Input (Btuh)

| ****

Motor Speed

| External Static Pressure (Inches Water Column)|
0.1| 0.2| 0.3| 0.4| 0.5| 0.6| 0.7| 0.8|
CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise|
SD108D-45D

Bottom Return (108,000)

| HIGH * MED-H ** MED-L

LOW

| 2276

2113

1819

1496

| 44

47

55

67

| 2228

2078

1789

1484

| 45

48

56

67

| 2173

2019

1757

1459

| 46

50

57

69

| 2108

1970

1706

1430

| 47

51

59

70

| 2035

1904

1666

1402

| 49

53

60

| 1961

1840

1610

1363

| 51

54

62

| 1876

1768

1551

1330

| 53

57

64

| 1778

1677

1486

1262

| 56

60

67

|
71| 73| 75| 79|
SD108D-45D

Side Return (108,000)

| HIGH * MED-H ** MED-L

LOW

| 2306

2135

1845

1543

| 43

47

54

65

| 2247

2103

1834

1521

| 45

50

57

69

| 2192

2050

1805

1502

| 46

51

58

70

| 2121

1995

1776

1477

| 47

53

59

| 2044

1935

1719

1452

| 49

54

61

| 1979

1858

1663

1412

| 51

57

63

| 1892

1778

1605

1368

| 53

59

66

| 1787

1690

1533

1314

| 56

62

69

|
71| 73| 75| 77| 80|
SD120D-45D

Bottom Return (120,000)

| HIGH * MED-H ** MED-L

LOW

| 2276

2113

1819

1496

| 49

53

61

| 2228

2078

1789

1484

| 50

53

62

| 2173

2019

1757

1459

| 51

55

63

| 2108

1970

1706

1430

| 53

56

65

| 2035

1904

1666

1402

| 55

58

67

| 1961

1840

1610

1363

| 57

60

69

| 1876

1768

1551

1330

| 59

63

| 1778

1677

1486

1262

| 62

66

|
72

84

| 75

88

|
74| 75| 76| 78| 79| 82|

SD120D-45D

Side Return (120,000)

| HIGH * MED-H ** MED-L

LOW

| 2306

2135

1845

1543

| 48

52

60

| 2247

2103

1834

1521

| 49

53

61

| 2192

2050

1805

1502

| 51

54

62

| 2121

1995

1776

1477

| 52

56

63

| 2044

1935

1719

1452

| 54

57

65

| 1979

1858

1663

1412

| 56

60

67

| 1892

1778

1605

1368

| 59

62

69

| 1787

1690

1533

1314

| 62

66

|
72

85

|
72| 73| 74| 75| 77| 79| 81|

BLOWER PERFORMANCE – FG7SM

*SM – DOWNFLOW FURNACES|
---|---
Model Number &

Heating Input (Btuh)

| ****

Motor Speed

| External Static Pressure (Inches Water Column)|
0.1| 0.2| 0.3| 0.4| 0.5| 0.6| 0.7| 0.8|
CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise| CFM| Rise|

SM054D-24B

Top Return (54,000)

| HIGH * MED-H MED-L **

LOW

| 1590

1228

1096

855

| 31

41

46

58

| 1563

1207

1079

825

| 32

41

46

| 1538

1193

1061

800

| 33

42

47

| 1513

1169

1038

777

| 33

43

48

| 1477

1157

1010

753

| 34

43

50

| 1430

1127

986

723

| 35

44

51

| 1370

1084

957

696

| 36

46

52

| 1312

1037

919

665

| 38

48

54

|
61| 63| 64| 66| 69| 72| 75|

SM072D-35C

Top Return (72,000)

| HIGH * MED-H ** MED-L

LOW

| 2235

2095

1871

1568

| 30

32

| 2176

2052

1838

1552

| 31

32

| 2121

2005

1797

1527

| 31

33

| 2067

1957

1761

1485

| 32

34

| 2010

1906

1716

1457

| 33| 1936

1852

1667

1418

| 34| 1864

1781

1602

1370

| 36

37

42

49

| 1783

1709

1536

1343

| 37

39

43

50

|
35

39

46

| 36

40

47

|
36

43

| 36

43

| 37

44

| 38

45

|

SM090D-35C

Top Return (90,000)

| HIGH * MED-H ** MED-L

LOW

| 2208

2065

1802

1490

| 38

40

46

56

| 2150

2015

1773

1482

| 39

41

47

56

| 2089

1970

1750

1464

| 40

42

48

57

| 2026

1910

1703

1436

| 41

44

49

58

| 1959

1866

1670

1407

| 43

45

50

59

| 1893

1805

1623

1380

| 44

46

51

60

| 1825

1737

1556

1329

| 46

48

54

63

| 1738

1668

1490

1271

| 48

50

56

|
66|

SM118D-45D

Top Return (118,000)

| HIGH * MED-H ** MED-L

LOW

| 2358

2176

1873

1544

| 46

50

58

| 2299

2135

1852

1528

| 48

51

59

| 2253

2102

1816

1514

| 48

52

60

| 2191

2046

1790

1499

| 50

53

61

| 2130

1985

1750

1462

| 51

55

62

| 2060

1932

1699

1441

| 53

57

64

| 1990

1862

1643

1429

| 55

59

66

| 1903

1777

1571

1386

| 57

61

70

|
71| 72| 72| 73| 75| 76| 76| 79|

NOTES:

• Factory Set Cooling Speed ** Factory Set Heating Speed

  1. Two openings are recommended for airflows above 1,600 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

VENTING

All models are approved for vertical non direct (1 pipe) and direct (2 pipe) venting applications. See Vent Table below for specified sizes and allowable lengths.

VENT TABLE

| SINGLE PIPE LENGTH (FT.) with 1 long radius elbow| DIRECT VENT, DUEL PIPE LENGTH (ft.) WITH
1 long radius elbow on each pipe
---|---|---
OUTLET| OUTLET| INLET/OUTLET| INLET/OUTLET
MODELS| 2”| 3”| 2”| 3”
SD038| 50| 70| 50| 70
SD054| 70| 90| 70| 90
SD072| 50| 90| 50| 90
SD090| 60| 90| 60| 90
SD108| N/A| 90| N/A| 90
SD120| N/A| 90| N/A| 90
SM054| 70| 90| 70| 90
---|---|---|---|---
SM072| 50| 90| 50| 90
SM090| 60| 90| 60| 90
SM118| N/A| 90| N/A| 90

• NOTE:

  1. Subtract 2.5 ft. for each additional 2″ elbow and 3.5 ft. for each additional 3″ elbow.
  2. Two 45 degree elbows are equivalent to one 90 degree elbow.
  3. One short radius elbow is equivalent to two long radius elbows.
  4. Do not include termination elbows in calculation of vent length.
  5. This table is applicable for elevations from sea level to 2000 ft. For higher elevations decrease vent pipe lengths by 8% per 1000 ft. of altitude.
  6. Only the listed pipe materials are approved for use with FG7 Condensing Furnaces.

• 118 = 118,000 for SM Models

SPECIFICATIONS

FG7SD MODEL NUMBERS:| -038D-24B| -054D-24B| -072D-35C| -090D-35C| -108D-45D| -120D-45D
---|---|---|---|---|---|---
Input – Btuh (a)| 38,000| 54,000| 72,000| 90,000| 108,000| 120,000
Heating Capacity – Btuh| 36,100| 51,300| 68,400| 85,500| 102,600| 114,000
AFUE| 95.0| 95.0| 95.0| 95.0| 95.0| 95.0
Blower D x W| 10 x 8| 11 x 8| 10 x 10| 11 x 10| 11 x 10| 11 x 10
Motor H.P. – Speed – Type| 1/2 – 4 – PSC| 1/2 – 4 – PSC| 1/2 – 4 – PSC| 1 – 4 – PSC| 1 – 4 – PSC| 1 – 4 – PSC
Motor FLA| 8.6| 8.6| 8.0| 13.75| 13.75| 13.75
Rated Ext. SP – In. W.C.| 0.5| 0.5| 0.5| 0.5| 0.5| 0.5
Temperature Rise Range – ºF| 30-60| 30-60| 35-65| 35-65| 40-70| 40-70
Shipping Weights| 100lbs| 120lbs| 130lbs| 135lbs| 155lbs| 155lbs
FG7SM MODEL NUMBERS:| -054D-24B| -072D-35C| -090D-35C| -118D-45D
---|---|---|---|---
Input – Btuh (a)| 54,000| 72,000| 90,000| 118,000
Heating Capacity – Btuh| 51,300| 68,400| 85,500| 112,100
AFUE| 95.0| 95.0| 95.0| 95.0
Blower D x W| 11 x 8| 11 x 10| 11 x 10| 11 x 10
Motor H.P. – Speed – Type| 1/2 – 4 – PSC| 1 – 4 – PSC| 1 – 4 – PSC| 1 – 4 – PSC
Motor FLA| 8.6| 13.7| 13.7| 13.75
Rated Ext. SP – In. W.C.| 0.5| 0.5| 0.5| 0.5
Temperature Rise Range – ºF| 30-60| 35-65| 35-65| 40-70
Shipping Weights| 120lbs| 125lbs| 135lbs| 155lbs

Note:

• All models are 115V, 60 Hz. Gas Connections are 1/2″ N.P.T. AFUE = Annual Fuel Utilization Efficiency
• (a) Ratings to 2,000 ft. Over 2,000 ft. reduce 4% for each 1,000 ft. above sea level.

ACCESSORIES

FG7S (D, M) KITS

Description| SKU
2″ Concentric vent kit| 904952
3″ Concentric vent kit| 904953
“B”, “C”, “D” Cabinet downflow sub base kit| 904911
2″ Side wall vent kit| 904617
3″ Side wall vent kit| 904347
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, “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
Neutralizer kit| 902377
“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

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 (10/2015) 749D-0512 (Replaces 749D-0212)

References

• TCPDF

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