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27

UPFLOW / HORIZONTAL GAS 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

SA090(†)-35C

Bottom Retur

n

90,000

High*

1,940

34

1,860

36

1,790

37

1,710

39

1,625

41

1,540

43

1,450

46

1,355

49

Med-High**

1,820

37

1,760

38

1,695

39

1,620

41

1,545

43

1,466

45

1,380

48

1,280

52

Med-Low

1,290

52

1,245

54

1,200

56

1,155

58

1,110

60

1,060

63

995

67

915

73

Low

1,145

58

1,110

60

1,070

62

1,035

64

1,000

67

950

70

905

74

835

80

SA090(†)-35C

Side Retur

n

90,000

High*

2,020

33

1,935

34

1,860

36

1,780

37

1,690

39

1,600

42

1,510

44

1,410

47

Med-High**

1,895

35

1,830

36

1,765

38

1,685

40

1,610

41

1,525

44

1,435

46

1,330

50

Med-Low

1,345

50

1,295

51

1,250

53

1,200

56

1,155

58

1,100

61

1,035

64

950

70

Low

1,190

56

1,155

58

1,115

60

1,075

62

1,040

64

980

68

940

71

870

77

SA090(†)-35C

Side + Bottom

or 2 Sides

90,000

High*

2,040

33

1,955

34

1,880

35

1,795

37

1,705

39

1,620

41

1,525

44

1,425

47

Med-High**

1,910

35

1,850

36

1,780

37

1,700

39

1,625

41

1,540

43

1,450

46

1,345

50

Med-Low

1,355

49

1,310

51

1,260

53

1,215

55

1,165

57

1,115

60

1,050

63

960

69

Low

1,205

55

1,165

57

1,125

59

1,085

61

1,050

63

1,000

67

950

70

875

76

SA108(†)-35C

Bottom Retur

n

108,000

High*

2,205

36

2,150

37

2,095

38

2,030

39

1,970

41

1,900

42

1,830

44

1,740

46

Med-High**

2,050

39

1,995

40

1,955

41

1,895

42

1,840

43

1,775

45

1,700

47

1,610

50

Med-Low

1,700

47

1,680

48

1,645

49

1,610

50

1,565

51

1,525

52

1,460

55

1,375

58

Low

1,390

58

1,370

58

1,355

59

1,320

61

1,300

62

1,270

63

1,225

65

1,175

68

SA108(†)-35C

Side Retur

n

108,000

High*

2,295

35

2,235

36

2,180

37

2,110

38

2,050

39

1,975

41

1,900

42

1,810

44

Med-High**

2,130

38

2,075

39

2,035

39

1,970

41

1,915

42

1,845

43

1,765

45

1,675

48

Med-Low

1,770

45

1,750

46

1,710

47

1,675

48

1,630

49

1,585

50

1,520

53

1,430

56

Low

1,445

55

1,425

56

1,410

57

1,375

58

1,350

59

1,320

61

1,275

63

1,225

65

SA108(†)-35C

Side + Bottom

or 2 Sides

108,000

High*

2,315

35

2,260

35

2,200

36

2,130

38

2,070

39

1,995

40

1,925

42

1,825

44

Med-High**

2,155

37

2,095

38

2,055

39

1,990

40

1,930

41

1,865

43

1,785

45

1,690

47

Med-Low

1,785

45

1,765

45

1,725

46

1,690

47

1,645

49

1,600

50

1,535

52

1,445

55

Low

1,460

55

1,440

56

1,425

56

1,385

58

1,365

59

1,335

60

1,285

62

1,235

65

SA126(†)-45D

Bottom only

or 2 openings

126,000

High*

2,255

41

2,200

42

2,125

44

2,065

45

2,010

46

1,935

48

1,855

50

1,755

53

Med-High**

2,075

45

2,025

46

1,970

47

1,940

48

1,875

50

1,810

52

1,750

53

1,680

56

Med-Low

1,720

54

1,695

55

1,655

56

1,630

57

1,580

59

1,520

61

1,455

64

1,390

67

Low

1,360

69

1,375

68

1,365

68

1,315

71

1,310

71

1,300

72

1,260

74

1,230

76

SA126(†)-45D

Side Retur

n

126,000

High*

2,230

42

2,180

43

2,105

44

2,045

46

1,990

47

1,915

49

1,835

51

1,740

54

Med-High**

2,055

45

2,005

47

1,950

48

1,920

49

1,855

50

1,790

52

1,735

54

1,665

56

Med-Low

1,705

55

1,680

56

1,640

57

1,615

58

1,565

60

1,505

62

1,440

65

1,375

68

Low

1,345

69

1,360

69

1,350

69

1,300

72

1,230

76

1,290

72

1,250

75

1,220

77

NOTES

:

(†) Can be C or N

1. Two openings are recommended for airfl ows above 1,600 CFM if fi lter(s) is(are) adjacent to furnace 

* Factory Set Cooling Speed

2. Temperature rises in the table are approximate. Actual temperature rises may vary.

** Factory Set Heating Speed

3. Temperature rises shaded in gray are for reference only. These conditions are not recommended

Table 2. Continued

Summary of Contents for 045C-23ASA

Page 1: ...future reference GAS FURNACES Single Stage High Efficiency Furnaces Installation Instructions SA Upflow Horizontal Model SK Downflow Model 80 AFUE DO NOT DESTROY KEEP IN A SAFE PLACE FOR FUTURE REFERE...

Page 2: ...n Air Inlet 9 Bottom Return Air Inlet 9 Horizontal Installation 9 Bottom Panel Removal 10 Downflow Installation 10 Installation on a Concrete Slab 10 VENTING REQUIREMENTS 12 Category I Venting 12 Hori...

Page 3: ...naces 24 Figure 16 Downflow Furnaces 25 Airflow Data 26 Table 2 Upflow Horizontal Gas Furnaces 26 Table 3 Downflow Gas Furnaces 28 Electrical Information 29 Table 4 Wire length and Voltage Specs 29 Ta...

Page 4: ...ting outside the space containing the furnace This furnace may be used for temporary heating of buildings or structures under construction See the guidelines listed on page 5 Agas firedfurnaceforinsta...

Page 5: ...equires redundant inspections Serial numbers for furnaces used during construction must be submitted in writing fax and email also acceptable This information will be used to track the long term affec...

Page 6: ...ance from the front of the unit is 36 inches The need to provide clearance for access to panels or doors may require clearance distances over and above the requirements COMBUSTION AIR REQUIREMENTS Gen...

Page 7: ...ppliance input The openings shall exchange directly or by ducts with the outdoor spaces crawl or attic that freely exchange with the outdoors Figure 3 Figure 3 Combustion Air Drawn from a Crawl Space...

Page 8: ...sq In 6 inches 140 000 35 sq In 7 inches 160 000 40 sq In 8 inches Furnace 12 Max Water Heater Vent or Chimney NOTES Each opening must be at least 100 sq in or 1 sq in per 1 000 Btuh of total input ra...

Page 9: ...nstalled horizontally in an attic basement crawl space or alcove Figure 6 It can also be suspended from a ceiling in a basement or utility room in either a right to left airflow or left to right airfl...

Page 10: ...built cased air conditioning coil However the plenum attached to the coil casing must be installed so that its surfaces are at least 1 from combustible construction Installation on a concrete slab 1 C...

Page 11: ...en the space in which the appliance s connected to the venting system are located and other spaces of the building 4 Close fireplace dampers 5 Turn on clothes dryers and any appliance not connected to...

Page 12: ...ventingsystemwillneed to be modified to comply with NFGC or local codes The venting system should be designed to have the minimum number of elbows or turns All horizontal runs shall slope upwards from...

Page 13: ...uding carbon monoxide poisoning that could result in personal injury or death All return ductwork must be secured to the furnace with sheet metal screws For installations in confined spaces all return...

Page 14: ...work may be connected to the left side right side or bottom The bottom panel Figure 15 page 24 must be installed for left or right return air NOTE Do not use the back of the furnace for return air Sid...

Page 15: ...o avoid unwanted noise and or damage to the furnace A typical gas service hookup is shown in Figure 11 Leak Check WARNING FIRE OR EXPLOSION HAZARD Never test for gas leaks with an open flame Check all...

Page 16: ...ecessaryforhigh altitude installation may only be accomplished with factory supplied orifices Do not attempt to drill out orifices in the field Improperly drilled orifices may cause fire explosion car...

Page 17: ...tor for the proper upgrade motor kit IMPORTANTNOTE Settheheatanticipatoraccording to the instructions supplied by the thermostat manufacturer To determine the heat anticipator setting 1 Add the curren...

Page 18: ...s on the terminal strip of the circuit board Verify the gas line service pressure does not exceed 10 0 inches of W C and is not less than 4 5 inches W C for natural gas For LP gas the line service pre...

Page 19: ...er to avoid false readings 2 Adjust all registers and duct dampers to the desired positionandrunthefurnacefor10to15minutesbefore taking any temperature readings The temperature rise is the difference...

Page 20: ...ir Limit Switch Note A properly functioning limit switch should turn off the gas valve when the return is blocked time depends on how well the return air is blocked The circulating air and combustion...

Page 21: ...that they were removed 12 Follow the lighting instructions found on the furnace door to return the furnace to operation Verify proper operation after servicing Cleaning Of Flue Passages If the flue p...

Page 22: ...of combustion products into the living space can create potentially hazardous conditions including carbon monoxide poisoning that could result in personal injury or death Check the vent pipe and or ch...

Page 23: ...Right Side 0 In Vent 1 In Back 0 In Top 1 In Front 4 In These are the listed clearances to combustible materials Allow 24 in minimum clearance for servicing Recommended clearance is 36 in The furnace...

Page 24: ...r N Dimensions shown in Inches Figure 15 SA 80 High Efficiency Upflow Horizontal Furnaces D 23 A 23 28 34 15 1 25 1 X 3 HOLE FOR GAS C 19 B 23 22 21 22 29 22 25 1 X 3 X 45 HOLE FOR GAS 4 KNOCKOUTS BOT...

Page 25: ...B FRONT BRACE 7 RIGHT SIDE LEFT SIDE BOTTOM VIEW FLANGES TOP VIEW 19 ACCEPTS 4 TYPE B VENT PIPE Figure 16 SK 80 High Efficiency Downflow Furnaces SK Model s Dimension A Dimension B Dimension C Dimensi...

Page 26: ...685 32 1 645 32 1 590 34 1 550 34 1 485 36 1 415 38 Med High 1 400 38 1 360 39 1 340 40 1 310 41 1 275 42 1 245 43 1 190 45 1 125 47 Med Low 1 235 43 1 215 44 1 180 45 1 155 46 1 130 47 1 100 48 1 060...

Page 27: ...65 1 175 68 SA108 35C Side Return 108 000 High 2 295 35 2 235 36 2 180 37 2 110 38 2 050 39 1 975 41 1 900 42 1 810 44 Med High 2 130 38 2 075 39 2 035 39 1 970 41 1 915 42 1 845 43 1 765 45 1 675 48...

Page 28: ...60 43 1 520 44 1 475 45 Med High 1 330 50 1 315 51 1 300 51 1 280 52 1 255 53 1 230 54 1 200 56 1 150 58 Med Low 1 180 56 1 165 57 1 150 58 1 135 59 1 115 60 1 090 61 1 060 63 1 010 66 Low 940 71 925...

Page 29: ...103 9 0 14 15 126 45D 126 000 24 115 60 1 127 103 15 2 12 30 NOTES can be C or N Time delay fuses or HACR type circuit breakers are required Thermostat Wire Gauge Recommended Thermostat Wire Length 2...

Page 30: ...K BLACK BLACK BLUE BLUE BLUE BLUE BLUE ORANGE BLUE GREEN BLUE BLACK BLACK WHITE BLACK WHITE WD 710731 C FIELD WIRING LEGEND LOW VOLTAGE HIGH VOLTAGE For 80 and 90 Single Stage Furnaces SINGLE STAGE TH...

Page 31: ...176 353 48 75 375 750 104 35 173 346 50 72 360 720 106 34 170 340 52 69 346 692 108 33 167 333 54 67 333 667 110 33 164 327 56 64 321 643 112 32 161 321 58 62 310 621 114 32 158 316 60 60 300 600 116...

Page 32: ...HIGH HIGH Table 9 Natural Gas Heating Values Table 8 High Altitude Deration Chart for Propane Gas PROPANE GAS ALTITUDE ABOVE SEA LEVEL INPUT BTU 45 000 54 000 72 000 90 000 108 000 126 000 0 to 1 999...

Page 33: ...LD PRESSURE 9 000 to 9 999 FT 51 49 49 49 49 49 ORIFICE SIZE 2 6 2 8 2 8 2 8 2 8 2 8 MANIFOLD PRESSURE Table 11 High Altitude Deration Chart for Natural Gas Low Heating Value NATURAL GAS LOW HEATING V...

Page 34: ...34...

Page 35: ...OW ML MH HIGH EAC L1 XFMR HUM 24V L1A 5 NEUTRALS 2 6 3 4 1 7 8 9 5 2 6 3 4 1 FAN 8 4 7 3 11 1 9 10 13 12 2 5 6 ITEM COMPONENT NAME 1 Blower Assembly 2 Blower Door Switch 3 Burner Assembly 4 Combustion...

Page 36: ...esh air supply for combustion and ventilation YES NO Installation Altitude ____________________ FT Deration Percentage ___________________ Furnace Input _______________________ Btuh Supply Air Tempera...

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