Literature Library FG7T Two Stage Variable Speed High Efficiency Upflow Horizontal and Downflow Gas Furnace Owner’s Manual

: June 15, 2024
: Literature Library

TECHNICAL
SPECIFICATIONS

FG7T (A and K Series) ISEER, Smartlite®

Two Stage, Variable Speed, High Efﬁciency Upﬂow/Horizontal and Downﬂow Gas Furnaces
Induced Draft – 80+ AFUE Input 60,000 – 140,000 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 Canada and the United States. FEATURES and BENEFITS

ISEER:Energy efficientbrushless 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 product will arrive to the homeowner dent free.
LowBoy Height: Easy to applyin 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.
Two Stage Inducer: Optimizes efficiency on first stage heat and reduces sound levels.
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 fittings for ease of service and replacement.
Highstatic blowers: Allmodels 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.
LPconvertible: 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 torecognize states without counting flashes.
Integrated control board: Incorporates connections for electronic air cleaner, humidifier and twinning.
Two piece door design: Enhances furnace appearance and uses captured screws to prevent loosing door screws.
Blower Compartment: Insulated for ultra quiet operation.

GAS FURNACE COMPONENTS

ITEM	COMPONENT NAME
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 (C and D cabinets only)
13.	Motor Control Board
14.	Motor Control Box
15.	Pressure Switches
16.	Transformer

Upﬂow/Horizontal Gas Furnace

ITEM	COMPONENT NAME
1.	Blower Assembly
2′	Blower Door Switch (behind blower panel)
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 (C and D cabinets only)
14.	Motor Control Board
15.	Pressure Switches
16.	Transformer

Downﬂow Gas Furnace

DIMENSIONS

*TA 80+ Upﬂow Furnace

*TA
Model’s| Dim.
“A”| Dim.
“B”| Dim.
“C”| Dim.
“D”
---|---|---|---|---
‘A’ CABINET| 14 1/4| 10 3/4| 12 5/8| 12 7/8
‘B’ CABINET| 17 1/2| 11 3/4| 15 7/8| 16 1/8
‘C’ CABINET| 21| 14| 19 3/8| 19 7/8
‘D’ CABINET| 24 1/2| 15 1/4| 22 7/8| 23 1/8
NOTES:
$IMENSIONS SHOWN IN )NCHES.

*TK 80+ Downﬂow Furnace

*TK
Model’s| Dim.
“A”| Dim.
“B”| Dim.
“C”| Dim.
“D”
---|---|---|---|---
‘A’ Cabinet| 14 1/4| 10 3/4| 12 5/8| 12 7/8
‘B’ Cabinet| 17 1/2| 11 3/4| 15 7/8| 16 1/8
‘C’ Cabinet| 21| 14| 19 3/8| 19 5/8
‘D’ Cabinet| 24 1/2| 15 1/4| 22 7/8| 23 1/8
NOTES:
Dimensions shown in Inches.

BLOWER PERFORMANCE – FG7TA/TK
Nominal Heating Airﬂows (CFM) and Temperature Rise (°F)

A Cabinet	*TA/TK-060( )-VA Models
3WITCH 3ETTINGS HEAT	INPUT (BTU) 60000
A/B 2 3 4	CFM
0	0
0	0
0	0
0	0
0	1
0	1
0	1
0	1
B Cabinet	*TA/TK-080( )-VB Models
---	---
SWITCH SETTINGS HEAT	INPUT (BTU) 80000
A/B 2 3 4	CFM
1	0
1	0
1	0
1	0
1	1
1	1
1	1
1	1
C Cabinet	*TA/TK-100( )-VC Models

Models
---|---|---
SWITCH SETTINGS HEAT| INPUT (B45) 100000| INPUT (BTU) 120000
A/B 2 3 4| CFM| TEMP RISE ( °F)| **** CFM| TEMP RISE ( °F)

| 0| 0| 0| 1000| 74| 1000| 89

| 0| 0| 1| 1115| 66| 1115| 80

| 0| 1| 0| 1230| 60| 1230| 72

| 0| 1| 1| 1345| 55| 1345| 66

| 1| 0| 0| 1460| 51| 1460| 61

| 1| 0| 1| 1575| 47| 1575| 56

| 1| 1| 0| 1690| 44| 1690| 53

| 1| 1| 1| 1805| 41| 1805| 49

D Cabinet	*TA-140( )-VD Model
SWITCH SETTINGS HEAT	INPUT (B45) 140000
A/B 2 3 4	CFM
#	0
#	0
#	0
#	0
#	1
#	1
#	1
#	1

Switch not used – can be 0 or 1

Notes:

Two openings are recommended for airflows above 1600 CFM f the fiter(s) is (are) adjacent to the fumace.
Temperature rises in the table are approximate. Actual temperature rises may vary.
Temperature rises that are shaded in grey are for reference only. These conditions are not recommended.

COOLING AIRFLOWS

MODEL IDENTIFICATION CODE

Switch not used – can be 0 or 1

SPECIFICATIONS

FG7TA/TK MODEL NUMBERS| 060-VA| 080-VB| 100-VC| 120-VC| *140-VD
---|---|---|---|---|---
INPUT – BTUH (A)| 60,000 / 39,000| 80,000 / 52,000| 100,000 / 65,000| 120,000 / 78,000| 140,000 / 91,000
(EATING CAPACITY – BTUH| 48,000 / 31,200| 64,000 / 41,600| 80,000 / 52,000| 96,000 / 62,400| 112,000 / 72,800
AFUE**| 80.0| 80.0| 80.0| 80.0| 80.0
BLOWER $ X 7| 10 X 6| 11 X 8| 11 X 10| 11 X 10| 11 X 10
MOTOR (.0. – 3PEED – 4YPE| 1/2 – 6ARIABLE| 1/2 – 6ARIABLE| 3/4 – 6ARIABLE| 3/4 – 6ARIABLE| 1 – 6ARIABLE
MOTOR &LA| 6.2| 6.2| 8.7| 8.7| 11.7
2ATED EXT. 30 – )N. 7.C.| 0.5| 0.5| 0.5| 0.5| 0.5
4EMPERATURE 2ISE 2ANGE – Ž&| 25-55| 30-60| 35-65| 35-65| 40-70
3HIPPING 7EIGHTS| 115LBS| 110LBS| 125LBS| 135LBS| 155LBS

“Canbe CorN

ACCESSORIES

FG7TA/TK KITS

All models are 115V, 60 HZ. Gas connections are 1/2″ N.PT.
AFUE= Annual Fuel Utilization Efficiency

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 (0 /2015)

360D-0909 (Replaces 360D-0709)