Literature Library FG7T Two Stage Variable Speed Condensing Upflow Horizontal and Downflow Gas Furnaces Owner’s Manual

June 15, 2024
Literature Library

Table of Contents

Literature Library FG7T Two-Stage Variable Speed Condensing Upflow

Horizontal and Downflow Gas Furnaces

Literature-Library-FG7T-Two-Stage-Variable-Speed-Condensing-Upflow-
Horizontal-and-Downflow-Gas-Furnaces-PRODUCT

Technical Specifications

  • Model: FG7T (C and L Series)
  • Type: Two Stage, Variable Speed, Condensing Upflow/Horizontal and Downflow Gas Furnaces
  • Induced Draft – 95.1 AFUE
  • Input: 60,000 – 120,000 Btuh

Features and Benefits

  • 100% fired and tested

  • Best packaging in the industry

  • 30-second blower delay

  • 30-second post purge

  • Two Stage Inducer

  • Hot surface igniter

  • Color-coded wire harness

  • Flexible category IV venting system

  • High Static Blowers

  • Low Boy Height

  • Tubular primary heat exchanger

  • 90-second fixed cooling cycle blower-off delay (TDR)

  • LP convertible

  • Diagnostic lights for easy troubleshooting without counting
    flashes

  • Incorporates integrated control board

  • Two-piece door design

  • Blower Compartment

  • Sealed Vestibule

Location of Furnace Components

Upflow/Horizontal Gas Furnace Components

  • Flame Sensor
  • Finish Flange
  • Roll-Out Switch
  • Burner Assembly
  • Pressure Switches (Inducer)
  • Main Air Limit Switch
  • Inducer Limit Switch
  • Inducer Assembly
  • Blower Door Switch
  • Air Flow
  • Igniter
  • Gas Valve
  • Furnace Control Board
  • Pressure Switches (Condensate)
  • Transformer
  • Motor Control Box
  • Motor Choke (C & D cabinets only)
  • Motor Control Board
  • Blower Assembly (behind blower panel)

Downflow Gas Furnace Components

  • Flame Sensor
  • Finish Flange
  • Roll-Out Switch
  • Burner Assembly
  • Pressure Switches (Inducer)
  • Main Air Limit Switch
  • Inducer Limit Switch
  • Inducer Assembly
  • Blower Door Switch
  • Air Flow
  • Igniter
  • Gas Valve
  • Furnace Control Board
  • Pressure Switches (Condensate)
  • Transformer
  • Motor Control Box
  • Motor Choke (C & D cabinets only)
  • Motor Control Board
  • Blower Assembly (behind blower panel)

Dimensions FG7TC 95.1+ High-Efficiency Upflow/Horizontal Series

  • Model #’s: TC
  • Dimension A: 19″
  • Dimension B: 23 1/2″
  • Dimension C: 3 1/4″

FG7TL 95.1+ High-Efficiency Downflow Series

  • Model #’s: TL
  • Dimension A: 19″
  • Dimension B: 3″
  • Dimension C: 7 1/2″

Blower Performance – FG7TC/TL

B Cabinet Switch Settings

  • HEAT: *TC/TL-060D-VB Models, Input (BTU): 60000
  • HEAT: *TC/TL-120D-VD Models, Input (BTU): 120000

C Cabinet Switch Settings

  • HEAT: *TC/TL-080D-VC Models, Input (BTU): 80000
  • HEAT: *TC/TL-100D-VC Models, Input (BTU): 100000

D Cabinet Switch Settings

  • HEAT: *TC/TL-120D-VD Models, Input (BTU): 120000

Cooling Airflow

A Cabinet Switch Settings

  • HEAT: A/B
  • COOL: 5, 6, 7, 8
  • LOW CFM: Nominal A/C and HP Capacity

B Cabinet Switch Settings

  • HEAT: B
  • COOL: 5, 6, 7, 8
  • LOW CFM: Nominal A/C and HP Capacity

C Cabinet Switch Settings

  • HEAT: C
  • COOL: 5, 6, 7, 8
  • LOW CFM: Nominal A/C and HP Capacity

D Cabinet Switch Settings

  • HEAT: D
  • COOL: 5, 6, 7, 8
  • LOW CFM: Nominal A/C and HP Capacity

Venting

  • The vent table is not provided in the given text extract.

Frequently Asked Questions (FAQ)

Q: What is the AFUE rating of the furnace?

  • A: The AFUE rating of the furnace is 95.1%.

Q: What is the input range of the furnace?

  • A: The input range of the furnace is 60,000 to 120,000 Btuh.

Q: What are the features of the furnace?

  • A: The furnace features include:
  • 100% fired and tested
  • Best packaging in the industry
  • 30-second blower delay
  • 30-second post purge
  • Two Stage Inducer
  • Hot surface igniter
  • Color-coded wire harness
  • Flexible category IV venting system
  • High Static Blowers
  • Low Boy Height
  • Tubular primary heat exchanger
  • 90-second fixed cooling cycle blower-off delay (TDR)
  • LP convertible
  • Diagnostic lights for easy troubleshooting without counting flashes
  • Incorporates integrated control board
  • Two-piece door design
  • Blower Compartment
  • Sealed Vestibule

Q: What are the dimensions of the furnace?

  • A: The dimensions of the furnace are as follows:
    • Model TC: Dimension A: 19″, Dimension B: 23 1/2″, Dimension C: 3 1/4″
    • Model TL: Dimension A: 19″, Dimension B: 3″, Dimension C: 7 1/2″

Q: How do I adjust the blower performance?

  • A: The blower performance can be adjusted by using the switch settings mentioned in the manual for each cabinet type and input BTU.

Q: What is the cooling airflow capacity?

  • A: The cooling airflow capacity varies based on the cabinet type and switch settings. Please refer to the manual for specific details.

Q: Is the furnace compatible with a single-pipe venting system?

  • A: The venting information is not provided in the given text extract. Please refer to the complete user manual for venting details.

TECHNICAL SPECIFICATIONS

  • Two Stage, Variable Speed,
  • Condensing Upflow/Horizontal and Downflow Gas Furnaces
  • Induced Draft – 95.1 AFUE
  • Input 60,000 – 120,000 Btuh
  • The high-efficiency upflow gas furnace may be installed free-standing in a utility room, or 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 is required for 10 years All Parts Warranty and Quality Pledge within a limited time after the installation.
  • See the current warranty document or visit our consumer website 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

  • iSEER: Energy efficient brushless DC (ECM) motor gives up to 1 SEER point efficiency 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 the product will arrive at 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 the life of the heat exchanger.
  • Two-Stage Inducer: Optimizes efficiency on first-stage heat and reduces sound levels.
  • 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 installation flexibility.
  • High Static Blowers: All models are 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 ensure a long life.
  • 90-second fixed cooling cycle blower-off delay
  • (TDR): Increases cooling performance when matched with a NORDYNE coil.
  • 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.

LOCATION OF FURNACE COMPONENTS

Literature-Library-FG7T-Two-Stage-Variable-Speed-Condensing-Upflow-
Horizontal-and-Downflow-Gas-Furnaces-FIG-1

DIMENSIONS

Literature-Library-FG7T-Two-Stage-Variable-Speed-Condensing-Upflow-
Horizontal-and-Downflow-Gas-Furnaces-FIG-3

*TC Model #’s| Dimension “A”| Dimension “B”| Dimension “C”
---|---|---|---
060$-6″| 17 ½| 15 ⅞| 16 ⅛
080$-6#| 21| 19 ⅜| 19 ⅝
100$-6#
120$-6$| 24 ½| 22 ⅞| 23 ⅛

NOTE: Dimensions shown in inches

FG7TC 95.1+ High Efficiency Upflow/Horizontal SeriesLiterature-Library-
FG7T-Two-Stage-Variable-Speed-Condensing-Upflow-Horizontal-and-Downflow-Gas-
Furnaces-FIG-4

BLOWER PERFORMANCE – FG7TC/TL

Nominal Heating Airflows (CFM) and Temperature Rise (°F)

B Cabinet *TC/TL-060D-VB Models
Switch Settings HEAT Input (BTU) 60000
****!/” **** 2

2ISE ( &)

1| 0| 0| 0| 1000| 53
1| 0| 0| 1| 1100| 48
1| 0| 1| 0| 1200| 44
1| 0| 1| 1| 1300| 41
1| 1| 0| 0| 1400| 38
1| 1| 0| 1| 1500| 35
1| 1| 1| 0| 1600| 33
1| 1| 1| 1| 1700| 31
D Cabinet| *TC/TL-120D-VD Models
---|---
Switch Settings HEAT| Input (BTU) 120000
!/”| 2| 3| 4| **** #&-| 4EMP

2ISE ( &)

| 0| 0| 0| 1500| 70

| 0| 0| 1| 1615| 65

| 0| 1| 0| 1730| 61

| 0| 1| 1| 1845| 57

| 1| 0| 0| 1960| 54

| 1| 0| 1| 2075| 51

| 1| 1| 0| 2190| 48

| 1| 1| 1| 2305| 46

C Cabinet *TC/TL-080D-VC Models *TC/TL-100D-VC Models
Switch Settings HEAT Input (BTU) 80000 Input (BTU) 100000

!/”

| ****

2

| ****

3

| ****

4

| ****

&-

| 4EMP

2ISE ( &)

| ****

&-

| 4EMP

2ISE ( &)

| 0| 0| 0| 1000| 70| 1000| 88

| 0| 0| 1| 1115| 63| 1115| 79

| 0| 1| 0| 1230| 57| 1230| 72

| 0| 1| 1| 1345| 52| 1345| 65

| 1| 0| 0| 1460| 48| 1460| 60

| 1| 0| 1| 1575| 45| 1575| 56

| 1| 1| 0| 1690| 42| 1690| 52

| 1| 1| 1| 1805| 39| 1805| 49

Switch not used – can be 0 or 1

Notes:

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

COOLING AIRFLOW

A Cabinet **Nominal A/C and HP Capacity**
Switch Settings **CFM**
HEAT COOL
A/B 5
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
B Cabinet ****

Nominal A/C and HP Capacity

---|---
Switch Settings| ****

CFM

HEAT| COOL
A/B| 5| 6| 7| 8| LOW| CFM
1| 0| 0| 0| 0| 485| 700| | 2 TON|
1| 0| 0| 0| 1| 525| 760
1| 0| 0| 1| 0| 565| 820| | 2.5 TON
1| 0| 0| 1| 1| 605| 880
1| 0| 1| 0| 0| 650| 940|
1| 0| 1| 0| 1| 690| 1000
1| 0| 1| 1| 0| 730| 1060| | 3 TON
1| 0| 1| 1| 1| 775| 1120
1| 1| 0| 0| 0| 815| 1180|
1| 1| 0| 0| 1| 855| 1240| | 3.5 TON
1| 1| 0| 1| 0| 895| 1300
1| 1| 0| 1| 1| 940| 1360
1| 1| 1| 0| 0| 980| 1420|
1| 1| 1| 0| 1| 1020| 1480
1| 1| 1| 1| 0| 1065| 1540
1| 1| 1| 1| 1| 1105| 1600
C Cabinet| ****

Nominal A/C and HP Capacity

---|---
Switch Settings| ****

CFM

HEAT| COOL
A/B| 5| 6| 7| 8| LOW| CFM

| 0| 0| 0| 0| 705| 1025| | 2.5 TON

| 0| 0| 0| 1| 750| 1090| | 3 TON

| 0| 0| 1| 0| 795| 1155

| 0| 0| 1| 1| 840| 1220|

| 0| 1| 0| 0| 885| 1285| | 3.5 TON

| 0| 1| 0| 1| 930| 1350|

| 0| 1| 1| 0| 975| 1415| | 4 TON

| 0| 1| 1| 1| 1020| 1480

| 1| 0| 0| 0| 1065| 1545|

| 1| 0| 0| 1| 1110| 1610

| 1| 0| 1| 0| 1155| 1675| | 5 TON

| 1| 0| 1| 1| 1200| 1740

| 1| 1| 0| 0| 1245| 1805

| 1| 1| 0| 1| 1290| 1870|

| 1| 1| 1| 0| 1335| 1935

| 1| 1| 1| 1| 1380| 2000

D Cabinet| ****

Nominal A/C and HP Capacity

---|---
Switch Settings| ****

CFM

HEAT| COOL
A/B| 5| 6| 7| 8| LOW| CFM

| 0| 0| 0| 0| 965| 1400| | 3.5 TON|

| 0| 0| 0| 1| 995| 1440| | 4 TON

| 0| 0| 1| 0| 1020| 1480

| 0| 0| 1| 1| 1050| 1520

| 0| 1| 0| 0| 1075| 1560|

| 0| 1| 0| 1| 1105| 1600

| 0| 1| 1| 0| 1130| 1640

| 0| 1| 1| 1| 1160| 1680

| 1| 0| 0| 0| 1185| 1720| | 5 TON

| 1| 0| 0| 1| 1215| 1760

| 1| 0| 1| 0| 1240| 1800

| 1| 0| 1| 1| 1270| 1840|

| 1| 1| 0| 0| 1295| 1880

| 1| 1| 0| 1| 1325| 1920

| 1| 1| 1| 0| 1350| 1960

| 1| 1| 1| 1| 1380| 2000

  • Switch not used – can be 0 or 1

VENTING

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

VENT TABLE

**FURNACE MODELS (BTU)| ****FURNACE INSTALLATION| SINGLE PIPE LENGTH (FT.)**

with 1 long radius elbow**

| DIRECT VENT,

DUAL PIPE LENGTH (ft.) WITH

1 long radius elbow on each pipe**

---|---|---|---
OUTLET| OUTLET| INLET/OUTLET| INLET/OUTLET
2” Diameter| 3” Diameter| 2” Diameter| 3” Diameter
60,000| 5PmOW| 90| 90| 90| 90
(HORIZONTAL| 50| 90| 50| 90
$OWNmOW| 30| 90| 30| 90
80,000| 5PmOW| 90| 90| 90| 90
(HORIZONTAL| 30| 90| 30| 90
$OWNmOW| 30| 90| 30| 90
100,000| 5PmOW| 60| 90| 60| 90
(HORIZONTAL| 30| 90| 30| 90
$OWNmOW| 30| 90| 25| 90
120,000| 5PmOW| ./!| 90| ./!| 90
(HORIZONTAL| ./!| 90| ./!| 90
$OWNmOW| ./!| 90| ./!| 90

NOTES:

  1. Subtract 2.5 ft. for each additional 2-inch long radius elbow, 5 ft. for each additional 2-inch short radius elbow, 3.5 ft. for each additional 3-inch long radius elbow, and 7 ft. for each additional 3-inch short radius elbow. Subtract 5ft for each 2″ tee and 8ft for each 3″ tee.
  2. Two 45-degree elbows are equivalent to one 90-degree elbow.
  3. This table applies to elevations from sea level to 2,000 ft. For higher elevations, decrease pipe lengths by 8% per 1,000 ft of altitude.

MODEL IDENTIFICATION CODE

Literature-Library-FG7T-Two-Stage-Variable-Speed-Condensing-Upflow-
Horizontal-and-Downflow-Gas-Furnaces-FIG-6

SPECIFICATIONS

FG7TC/TL MODELSNUMBERS:| **-060D-VB| ****-080D-VC| ****-100D-VC| ****-120D-VD
---|---|---|---|---
)NPUT – “TUH (A)| 60,000 / 39,000| 80,000 / 52,000| 100,000 / 65,000| 120,000 / 78,000
(EATING #APACITY – “TUH| 57,000 / 37,050| 76,000 / 49,400| 95,000 / 61,750| 114,000 / 74,100
AFUE*| 95.1| 95.1| 95.1| 95.1
“LOWER $ X 7| 11 X 8| 11 X 10| 11 X 10| 11 X 10
-OTOR (.0. – 3PEED – 4YPE| 1/2 – 6ARIABLE| 3/4 – 6ARIABLE| 3/4 – 6ARIABLE| 1 – 6ARIABLE
-OTOR &,!| 6.2| 8.7| 8.7| 11.70
2ATED %XT. 30 – )N. 7.#.| 0.5| 0.5| 0.5| 0.5
4EMPERATURE 2ISE 2ANGE – Ž&| 30-60| 35-65| 35-65| 40-70
3HIPPING 7EIGHTS| 125LBS| 135LBS| 145LBS| 160LBS

TL 120 is 94.8% AFUE

Note:

  • All models are 115V, and 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

FG7TC/TL KITS

Description| SKU
2″ #ONCENTRIC VENT KIT| 904177
3″ #ONCENTRIC VENT KIT| 904176
“!” #ABINET DOWNmOW SUB BASE KIT| 902974
“””, “#”, “$” #ABINET DOWNmOW SUB BASE KIT| 904911
2″ 3IDE WALL VENT KIT| 904617
3″ 3IDE WALL VENT KIT| 904347
5.3. ,0 #ONVERSION KIT (0 TO 10,000 FT.)| 904914

ANADA ,0 #ONVERSION KIT (0 TO 4,500 FT.)| 904915

“OTTOM RETURN lLTER 20 PER BOX, “!” CABINET| 903088
“OTTOM RETURN lLTER 20 PER BOX, “”” CABINET| 904916
“OTTOM RETURN lLTER 20 PER BOX, “#” CABINET| 904917
“OTTOM RETURN lLTER 20 PER BOX, “$” CABINET| 904918
3IDE RETURN lLTER KIT| 541036
.EUTRALIZER KIT| 902377

GENERAL TERMS OF LIMITED WARRANTY

  • NORDYNE will furnish a replacement for any part of this product that fails in normal use and service within the first ten years of installation, under the terms of the warranty.
  • contact the NO aVNE Warramy de payment or a ding applicable terms and conditions, see your local installer or NORDYNE COMPLETE COMFORT. GENUINE VALUE. 8000 Phoenix Parkway | O’Fallon, MO 63368-3827
  • Specifications and illustrations are subject to change without notice and without incurring obligations. Printed in U.S.A (09/2010) 218D-0910 (Replaces 218D-0210)Literature-Library-FG7T-Two-Stage-Variable-Speed-Condensing-Upflow-Horizontal-and-Downflow-Gas-Furnaces-FIG-5

References

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