Nordyne iSEER Smartlite FG7T A Series User manual

• i SEER: Energy efcient brushless DC (ECM) motor
givesupto1SEERpointefciencygainincooling.
• 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.
• LowBoyHeight: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ttings forease of
serviceandreplacement.
• Highstaticblowers: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 I venting system: May bevented
withdedicatedventingsystemorcommonventedwith
othercategoryoneappliances.
• Variable speed blower kit: Upgradabletofullvariable
speedwithkit.
• LPconvertible:Simpleburneroriceandregulatorspring
changeforeaseofconvertibility.
• Diagnostic lights for easy troubleshooting without
counting flashes: Dedicated light for ame signal
strengthand2lightsincombinationtoindicateallother
faultcodeswitheasytorecognizestateswithoutcounting
ashes.
• Integrated control board:Incorporatesconnectionsfor
electronicaircleaner,humidierandtwinning.
• Twopiecedoordesign:Enhancesfurnaceappearance
and uses captured screws to prevent loosing door
screws.
• Blower Compartment: Insulated for ultra quiet
operation.
• 2StageInducer:Optimizesefciencyonrststageheat
andreducessoundlevels.
Induced Draft - 80 + AFUE
Input 60,000 - 140,000 Btuh
FG7T (A and K Series)
Two Stage, Fixed Speed,
High Efficiency Upflow/Horizontal
and Downflow Gas Furnaces
The high efciency 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certiedbyCSA
forapplicationinCanadaandtheUnitedStates.
FEATURES and BENEFITS
, Smartlite®
–10Yearall-partswarranty.
–10YearQualityPledgetoreplacetheunitif theheat
exchangerfailswithintherst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forwarranty
details.
–Whenregistered,thisproductisupgradedtoalimited
lifetimeheatexchangerwarranty.
WARRANTY
TECHNICAL
SPECIFICATIONS

2
Downflow Gas Furnace
GAS FURNACE COMPONENTS
Upflow/Horizontal Gas Furnace
1 2 3 45 6 7 8
9
6
8
3
15
1
10
16
11
4
5
7
12
13
2
14
1 2 3 45 6 7 8
15
16
7
6
8
9
3
11
4
2
13
12
14
10
5
1
1. BlowerAssembly
2. BlowerDoorSwitch
3. BurnerAssembly
4. CombustionTube
5. FlameRoll-OutSwitch
6. FlameSensor
7. FurnaceControlBoard
8. GasManifold
9. GasValve
10. Igniter
11. InducerAssembly
12. MainAirLimitSwitch
13. MotorChoke(3/4and1HPonly)
14. MotorControlBoard
15. PressureSwitch(s)
16. Transformer
1. BlowerAssembly
2. BlowerDoorSwitch
3. BurnerAssembly
4. FlameRoll-OutSwitch
5. FlameSensor
6. FurnaceControlBoard
7. GasManifold
8. GasValve
9. Igniter
10. InducerAssembly
11. MainAirLimitSwitch
12. MotorChoke(3/4and1HPonly)
13. MotorControlBoard
14. MotorControlBox
15. PressureSwitch(s)
16. Transformer

3
DIMENSIONS
FG7TA 80+ High Efficiency Upflow/Horizontal Series
FG7TK 80+ High Efficiency Downflow Series
D
23 1/2
A
23
28
34 1/2
15
1
25 3/8 1 5/8 X 3 1/2
HOLE FOR GAS
C
19
B
23
22 3/4
21 3/4
22 1/4
29 1/2
22 1/2
25
1 5/8 X 3 1/2 X45°
HOLE FOR
GAS
4 KNOCKOUTS
(BOTH SIDES)
BOTTOM
PANEL
LEFT SIDE RIGHT SIDE
BOTTOMVIEW
TOP VIEW
ACCEPTS 4”
TYPE B
VENT PIPE
23
1 1/4
Ø 7/8 HOLE FOR
THERMOSTAT
Ø 7/8 HOLE FOR
ELECTRIC
Ø 7/8 HOLE FOR
ELECTRIC
FRONT
BRACE
FLANGES
*TA
Model #’s Dimension “A” Dimension “B” Dimension “C” Dimension “D”
060-23A1 14
¼ 10 ¾ 12 ⅝ 12 ⅞
080-24B1
17
½ 11 ¾ 15 ⅞ 16 ⅛ 100-24B1
100-35C1
21 14 19
⅜ 19 ⅝ 120-35C1
140-45D1 24
½ 15 ¼ 22⅞23 ⅛
A
18 5/8
DC
7
34 1/2
22 1/2
28
25 3/8
Ø 7/8 HOLE
FOR ELECTRIC
Ø 7/8 HOLE
FOR THERMOSTAT
Ø 7/8 HOLE
FOR ELECTRIC
1 5/8 X 3 1/2 HOLE
FOR GAS
22 1/2
25
22 1/4
29 1/2
1 5/8 X 3 1/2 X 45°
HOLE FOR GAS
23
B
FRONT
BRACE
7
RIGHT SIDE
LEFT SIDE
BOTTOMVIEW
TOP VIEW
19
ACCEPTS 4”
TYPE B
VENT PIPE
FLANGES
*TK
Model #’s Dimension “A” Dimension “B” Dimension “C” Dimension “D”
060-23A1 14
¼ 10 ¾ 12 ⅝ 12 ⅞
080-24B1
17
½ 11 ¾ 15 ⅞ 16 ⅛ 100-24B1
100-35C1
21 14 19
⅜ 19 ⅝ 120-35C1
140-45D1 24
½ 15 ¼ 22⅞23 ⅛

4
BLOWER PERFORMANCE - FG7TA/TK
FG7TA/TK - 80% AFUE,Two Stage Gas Furnace
Model Number Heating Input
(Btuh)
Motor Switch
Setting External Static Pressure (in.w.c.)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
1/5 2/6 3/7 4/8 CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise
*TA/TK-060(C)-*A1 60000
0 0 0 0 
1 0 0 0 
0 1 0 0 600 74 555 80 510 
1 1 0 0 705 63 670 66 635 70 600 74
0 0 1 0 775 57 740 60 705 63 665 67
1 0 1 0 900 49 870 51 835 53 800 56 765 58 730 61 695 64 660 67
0 1 1 0 950 47 920 48 890 50 855 52 825 54 795 56 765 58 730 61
1 1 1 0 1000 44 970 46 940 47 910 49 880 51 850 52 820 54 790 56
0 0 0 1 1075 41 1045 43 1015 44 985 45 960 46 925 48 900 49 870 51
1 0 0 1 1110 40 1080 41 1055 42 1025 43 1000 44 975 46 945 47 920 48
0 1 0 1 1170 38 1140 39 1115 40 1090 41 1060 42 1035 43 1010 44 985 45
1 1 0 1 1210 37 1185 38 1160 38 1130 39 1105 40 1080 41 1055 42 1025 43
0 0 1 1 1520 29 1225 36 1200 37 1175 38 1150 39 1120 40 1095 41 1070 42
1 0 1 1 1305 34 1280 35 1255 35 1230 36 1205 37 1180 38 1155 38 1130 39
0 1 1 1 1350 33 1230 36 1305 34 1285 35 1260 35 1240 36 1215 37 1195 37
1 1 1 1 1440 31 1400 32 1365 33 1230 36 1295 36 1255 35 1220 36 1185 38
*TA/TK-080(C)-*B1 80000
0 0 0 0
1 0 0 0
0 1 0 0
1 1 0 0 725 82 
0 0 1 0 810 73 
1 0 1 0 940 63 890 67 845 70 795 75 750 79 700 85
0 1 1 0 990 60 945 63 905 65 860 69 820 72 775 76 735 81 690 86
1 1 1 0 1055 56 1015 58 970 61 930 64 890 67 845 70 805 74 760 78
0 0 0 1 1135 52 1095 54 1055 56 1010 59 960 62 930 64 890 67 850 70
1 0 0 1 1185 50 1145 52 1105 54 1065 56 1030 58 990 60 950 62 910 65
0 1 0 1 1250 47 1210 49 1170 51 1135 52 1095 54 1055 56 1020 58 980 60
1 1 0 1 1290 46 1255 47 1220 49 1180 50 1145 52 1110 53 1075 55 1040 57
0 0 1 1 1315 45 1275 46 1240 48 1200 49 1160 51 1120 53 1085 55 1045 57
1 0 1 1 1350 44 1315 45 1280 46 1245 48 1205 49 1170 51 1135 52 1100 54
0 1 1 1 1390 43 1350 44 1315 45 1275 46 1240 48 1200 49 1160 51 1125 53
1 1 1 1 1420 42 1380 43 1345 44 1310 45 1270 47 1235 48 1200 49 1160 51
Notes:
1.MotorSwitchSettingsareforheatingspeedsusingHEATswitches1,2,3,&4andcoolingspeedsusingCOOLswitches5,6,7,&8.
2.Twoopeningsarerecommendedforairowsabove1600CFMifthelter(s)is(are)adjacenttothefurnace.
3.Dataisshownwithoutlter.
4.Temperaturerisesinthetableareapproximate.Actualtemperaturerisesmayvary.
5.Temperaturerisesthatareshadedingreyareforreferenceonly.Theseconditionsarenotrecommended.

5
BLOWER PERFORMANCE - FG7TA/TK Continued
Notes:
1.MotorSwitchSettingsareforheatingspeedsusingHEATswitches1,2,3,&4andcoolingspeedsusingCOOLswitches5,6,7,&8.
2.Twoopeningsarerecommendedforairowsabove1600CFMifthelter(s)is(are)adjacenttothefurnace.
3.Dataisshownwithoutlter.
4.Temperaturerisesinthetableareapproximate.Actualtemperaturerisesmayvary.
5.Temperaturerisesthatareshadedingreyareforreferenceonly.Theseconditionsarenotrecommended.
G7TA/TK - 80% AFUE,Two Stage Gas Furnace
Model Number Heating Input
(Btuh)
Motor Switch
Setting External Static Pressure (in.w.c.)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
1/5 2/6 3/7 4/8 CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise
*TA100(C)-*B1
0 0 0 0 905 82 890 83 805 92 780 95
1 0 0 0 980 76 930 80 900 82 835 89 820 90 800 93 715 104 670 111
0 1 0 0 1095 68 1015 73 980 76 915 81 895 83 870 85 810 91 765 97
1 1 0 0 1160 64 1100 67 1065 70 1035 72 995 74 940 79 895 83 865 86
0 0 1 0 1230 60 1195 62 1170 63 1110 67 1075 69 1060 70 995 74 970 76
1 0 1 0 1315 56 1275 58 1240 60 1195 62 1160 64 1140 65 1115 66 1075 69
0 1 1 0 1345 55 1310 57 1280 58 1250 59 1220 61 1190 62 1140 65 1115 66
100000 1 1 1 0 1445 51 1390 53 1350 55 1315 56 1280 58 1250 59 1230 60 1185 63
0 0 0 1 1490 50 1430 52 1420 52 1380 54 1340 55 1310 57 1280 58 1275 58
1 0 0 1 1550 48 1510 49 1475 50 1450 51 1420 52 1375 54 1340 55 1325 56
0 1 0 1 1600 46 1270 58 1540 48 1500 49 1475 50 1445 51 1425 52 1385 53
1 1 0 1 1640 45 1605 46 1570 47 1550 48 1525 49 1490 50 1460 51 1430 52
0 0 1 1 1690 44 1665 44 1630 45 1600 46 1570 47 1550 48 1515 49 1490 50
1 0 1 1 1755 42 1730 43 1680 44 1660 45 1640 45 1610 46 1575 47 1550 48
0 1 1 1 1805 41 1770 42 1740 43 1715 43 1690 44 1655 45 1645 45 1605 46
1 1 1 1 1860 40 1825 41 1790 41 1765 42 1745 42 1710 43 1695 44 1660 45
*TA/TK-100(C)-*C1 100000
0 0 0 0 1125 66 1040 71 960 77  
1 0 0 0 1205 61 1120 66 1040 71 960 77
0 1 0 0 1305 57 1225 60 1150 64 1070 69 995 74 915 81    
1 1 0 0 1430 52 1350 55 1270 58 1190 62 1110 67 1030 72 950 78 865 86
0 0 1 0 1525 49 1450 51 1375 54 1300 57 1225 60 1150 64 1075 69 1000 74
1 0 1 0 1620 46 1540 48 1465 51 1390 53 1315 56 1240 60 1165 64 1090 68
0 1 1 0 1695 44 1620 46 1545 48 1465 51 1390 53 1315 56 1235 60 1160 64
1 1 1 0 1770 42 1700 44 1630 45 1555 48 1485 50 1410 53 1340 55 1265 59
0 0 0 1 1875 40 1805 41 1730 43 1655 45 1580 47 1510 49 1435 52 1340 55
1 0 0 1 1905 39 1840 40 1775 42 1710 43 1640 45 1575 47 1510 49 1445 51
0 1 0 1 1980 37 1910 39 1845 40 1780 42 1715 43 1650 45 1580 47 1515 49
1 1 0 1 2025 37 1960 38 1895 39 1830 40 1765 42 1700 44 1635 45 1570 47
0 0 1 1 2085 36 2025 37 1960 38 1900 39 1840 40 1775 42 1715 43 1655 45
1 0 1 1 2135 35 2070 36 2010 37 1945 38 1880 39 1815 41 1750 42 1685 44
0 1 1 1 2200 34 2145 35 2090 35 2035 36 1980 37 1925 38 1870 40 1820 41
1 1 1 1 2280 32 2225 27 2170 34 2115 35 2065 22 2010 37 1955 38 1900 39

6
BLOWER PERFORMANCE - FG7TA/TK Continued
FG7TA/TK - 80% AFUE,Two Stage Gas Furnace
Model Number Heating Input
(Btuh)
Motor Switch
Setting External Static Pressure (in.w.c.)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
1/5 2/6 3/7 4/8 CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise
*TA/TK-120(C)-*C1 120000
0 0 0 0 1125 79 1040    
1 0 0 0 1205 74 1120 79 1040 85
0 1 0 0 1305 68 1225 73 1150 77 1070 83  
1 1 0 0 1430 62 1350 66 1270 70 1190 75 1110 80 1030 86  
0 0 1 0 1525 58 1450 61 1375 65 1300 68 1225 73 1150 77 1075 83 1000 89
1 0 1 0 1620 55 1540 58 1465 61 1390 64 1315 68 1240 72 1165 76 1090 82
0 1 1 0 1695 52 1620 55 1545 58 1465 61 1390 64 1315 68 1235 72 1160 77
1 1 1 0 1770 50 1700 52 1630 55 1555 57 1485 60 1410 63 1340 66 1265 70
0 0 0 1 1875 47 1805 49 1730 51 1655 54 1580 56 1510 59 1435 62 1340 66
1 0 0 1 1905 47 1840 48 1775 50 1710 52 1640 54 1575 56 1510 59 1445 62
0 1 0 1 1980 45 1910 47 1845 48 1780 50 1715 52 1650 54 1580 56 1515 59
1 1 0 1 2025 44 1960 45 1895 47 1830 49 1765 50 1700 52 1635 54 1570 57
0 0 1 1 2085 43 2025 44 1960 45 1900 47 1840 48 1775 50 1715 52 1655 54
1 0 1 1 2135 42 2070 43 2010 44 1945 46 1880 47 1815 49 1750 51 1685 53
0 1 1 1 2200 40 2145 41 2090 43 2035 44 1980 45 1925 46 1870 48 1820 49
1 1 1 1 2280 39 2225 40 2170 41 2115 42 2065 43 2010 44 1955 45 1900 47
*TA/TK-140(C)-*D1 140000
0 0 0 0 1395 74 1350 77 1305 79 1260 82 1210 86 1165 89
1 0 0 0 1465 71 1420 73 1375 75 1330 78 1290 80 1245 83 1200 86  
0 1 0 0 1555 67 1510 69 1470 71 1425 73 1380 75 1340 77 1295 80 1250 83
1 1 0 0 1625 64 1585 65 1540 67 1500 69 1460 71 1415 73 1375 75 1335 78
0 0 1 0 1690 61 1650 63 1610 64 1570 66 1530 68 1485 70 1445 72 1405 74
1 0 1 0 1760 59 1715 60 1670 62 1625 64 1575 66 1530 68 1485 70 1440 72
0 1 1 0 1835 57 1790 58 1745 59 1695 61 1650 63 1605 65 1555 67 1510 69
1 1 1 0 1885 55 1840 56 1790 58 1745 59 1700 61 1655 63 1610 64 1565 66
0 0 0 1 1945 53 1900 55 1850 56 1805 57 1760 59 1710 61 1665 62 1620 64
1 0 0 1 1950 53 1905 54 1860 56 1820 57 1775 58 1735 60 1690 61 1650 63
0 1 0 1 2075 50 2030 51 1990 52 1945 53 1900 55 1855 56 1810 57 1770 59
1 1 0 1 2125 49 2085 50 2040 51 2000 52 1955 53 1910 54 1870 55 1825 57
0 0 1 1 2170 48 2130 49 2090 50 2045 51 2005 52 1965 53 1925 54 1880 55
1 0 1 1 2215 47 2180 48 2140 48 2105 49 2070 50 2035 51 2000 52 1965 53
0 1 1 1 2225 47 2165 48 2100 49 2040 51
1 1 1 1 2170 48 2120 49 2065 50
Notes:
1.MotorSwitchSettingsareforheatingspeedsusingHEATswitches1,2,3,&4andcoolingspeedsusingCOOLswitches5,6,7,&8.
2.Twoopeningsarerecommendedforairowsabove1600CFMifthelter(s)is(are)adjacenttothefurnace.
3.Dataisshownwithoutlter.
4.Temperaturerisesinthetableareapproximate.Actualtemperaturerisesmayvary.
5.Temperaturerisesthatareshadedingreyareforreferenceonly.Theseconditionsarenotrecommended.

7
MODEL IDENTIFICATION CODE
DesignSeries
A=80%Upow/Horizontal
C=92.1%/95.1%Upow/Horizontal
K=80%Downow
L=92.1%/95.1%Downow
Q=96.4+%AFUEUpow/Horizontal
FG T080 C23
Input Heating Capacity
060=60,000
080=80,000
100=100,000
120=120,000
140=140,000
S=SingleStage
T=TwoStage
M=Modulating
GasFurnace
A
C=Standard
D=90+%AFUELowNOx
Cooling Airflow
23=2-3Tons
24=2-4Tons
35=3-5Tons
45=4-5Tons
V=VSB
7
CabinetWidth
A=14.25
B=17.50
C=21.00
D=24.50
B
SPECIFICATIONS
FG7TA/TK
MODEL NUMBERS 060C-23A1 080C-24B1 100C-24B1 100C-35C1 120C-35C1 140C-45D1
Input-Btuh(a) 60,000/39,000 80,000/52,000 100,000/65,000 100,000/65,000 120,000/78,000 140,000/91,000
HeatingCapacity-Btuh 48,000/31,200 64,000/41,600 80,000/52,000 80,000/52,000 96,000/62,400 112,000/72,800
AFUE 80.0 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 11x10
MotorH.P.-Speed-Type 1/2-BLDC 1/2-BLDC 3/4-BLDC 3/4-BLDC 3/4-BLDC 1-BLDC
MotorFLA 6.2 6.2 8.7 8.7 8.7 11.7
RatedExt.SP-In.W.C. 0.5 0.5 0.5 0.5 0.5 0.5
TemperatureRiseRange-ºF 25-55 30-60 30-60 35-65 35-65 40-70
ShippingWeights 115lbs 110lbs 120lbs 125lbs 135lbs 155lbs
Allmodelsare115V,60HZ.Gasconnectionsare1/2"N.P.T.
AFUE=AnnualFuelUtilizationEfciency
1
RevisionLevel

FG7TA/TK KITS
Description SKU
Fixedspeed-to-variablespeed 904880
"A"Cabinetdownowsubbasekit 902974
"B","C","D"Cabinetdownowsubbasekit 904911
U.S.LPConversionkit(0to10,000ft.) 904914
CanadaLPConversionkit(0to4,500ft.) 904915
Bottomreturnlter20perbox,"A"cabinet 903088
Bottomreturnlter20perbox,"B"cabinet 904916
Bottomreturnlter20perbox,"C"cabinet 904917
Bottomreturnlter20perbox,"D"cabinet 904918
Sidereturnlterkit 541036
ACCESSORIES
819C-0210(Replaces819C-1009)
GENERALTERMS OF LIMITED WARRANTY
8000PhoenixParkway|O'Fallon,MO63368-3827
Specicationsandillustrationssubjecttochangewithoutnoticeandwithoutincurringobligations.PrintedinU.S.A(02/2010)
NORDYNEwillfurnishareplacementforanypartofthisproductwhichfailsinnormaluseandservicewithinthe
rst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.