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

The high-efficiency upflow gas furnace can be installed free-standing in a utility room, or basement, or enclosed in an alcove or closet. Ensure proper clearance and ventilation according to local building codes. Follow the installation instructions provided in the user manual for a safe and proper installation.

Operation

Ensure the gas and electrical connections are properly connected.

Set the desired temperature on the furnace control board.
Turn on the power to the furnace.

The furnace will go through a startup sequence, and the blower will start once the furnace is ready.
Observe the flame sensor, igniter, and burner assembly for proper operation.
Monitor the temperature rise and adjust settings if necessary.
Regularly check and replace the air filters as needed.

Maintenance

To ensure optimal performance and longevity of the gas furnace, regular maintenance is required:

Clean or replace air filters regularly.
Inspect and clean the burner assembly.
Clean the flame sensor.
Check and clean the blower assembly.
Inspect and clean the venting system.
Check for any gas leaks or unusual odors.

Troubleshooting

If you experience any issues with the gas furnace, refer to the troubleshooting section in the user manual. If the issue persists, contact a qualified technician for assistance.

Safety Precautions

When working with or around the gas furnace, always follow these safety precautions:

Turn off power to the furnace before performing any maintenance or repairs.

Use caution when handling hot surfaces.
Ensure proper ventilation during operation.
Do not attempt to modify or tamper with any components.

Keep flammable materials away from the furnace.

FAQ

Q: Where can the high efficiency upflow gas furnace be installed?
- A: The furnace can be installed free standing in a utility room, basement, or enclosed in an alcove or closet.
Q: What certifications does the gas furnace have?
- A: The gas furnace is design certified by CSA for application in Canada and the United States.

Q: How often should I clean or replace the air filters?
- A: Air filters should be checked regularly and cleaned or replaced as needed. The frequency may vary depending on usage and environmental conditions.

Induced Draft – 96% AFUE
Input 60,000 – 115,000 Btuh

The high efficiency upflow gas furnace may be installed free standing in a utility room, basement, or enclosed in an alcove or closet. The extended flush jacket provides a pleasing “appliance appearance.” Design certified by CSA for application in Canada and the United States.

FEATURES AND BENEFITS

iSEERTM: Energy efficient brushless DC (ECM) motor can give 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.
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 ECM blowers, with 16 speeds for heating & cooling.
Low Boy Height: Easy to apply in low ceiling applications, works well with taller high SEER coils, easier to handle and install.
Heat Exchanger: Heavy gauge aluminized steel primary heat exchanger and stainless steel secondary heat exchanger assures a long life.

90 Second Fixed Cooling Cycle Blower-Off Delay (TDR): Increases cooling performance when matched with a Nortek Global HVAC coil.
LP Convertible: Simple burner orifice and regulator spring change for ease of convertibility (as an accessory).
Diagnostic Lights: Dedicated light for flame signal strength and 2 lights in combination to indicate all other fault codes with easy to recognize states without counting0 flashes.

Integrated Control Boards: With connections for electronic air cleaner, humidifier, and dehumidification.
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.
Two Stage Inducer: Optimizes efficiency on first stage heat and reduces sound levels.
Furnace Air Leakage: These furnaces comply with Energy Star cabinet air leakage requirement of less than or equal to 2%. Keep the conditioned air flowing to where it’s needed.

LOCATION OF FURNACE COMPONENTS

UPFLOW FURNACE (*TE SERIES)

DOWNFLOW FURNACE (*TN SERIES)

DIMENSIONS

FG7TE 96% High Efficiency Upflow Series

*TE Model #’s	Dimension “A”	Dimension “B”	Dimension “C”
060D-VB1	17 1/2	15 7/8	16 1/8
080D-VC1	21	19 3/8	19 5/8
100D-VC1	21	19 3/8	19 5/8
115D-VD1	24 1/2	22 7/8	23 1/8

NOTE: Dimensions shown in inches

FG7TN 96% High Efficiency Downflow Series

NOTE: Dimensions shown in inches

BLOWER PERFORMANCE

BLOWER PERFORMANCE – FG7TE/TN

NOMINAL HEATING AIRFLOWS (CFM) AND TEMPERATURE RISE (°F)
“B” CABINET RISE 30° F TO 60° F	SWITCH SETTINGS FOR HEAT (0 = OFF, 1 = ON)				TE/TN – 060D – VB1 INPUT (BTU) 60,000
	1	2	3	4	CFM	TEMP RISE (° F)
	1	0	0	0	1,000	53
	1	0	0	1	1,100	48
	1	0	1	0	1,200	44
	1	0	1	1	1,300	41
	1	1	0	0	1,400	38
	1	1	0	1	1,500	35
	1	1	1	0	1,600	—
	1	1	1	1	1,700	—

“C” CABINET RISE 35° F TO 65° F	SWITCH SETTINGS FOR HEAT (0 = OFF, 1 = ON)				TE/TN – 080D – VC1 INPUT (BTU) 80,000		TE/TN – 100D – VC1 INPUT (BTU) 100,000
	1	2	3	4	CFM	TEMP RISE (° F)	CFM	TEMP RISE (° F)
	#	0	0	0	1,000	—	1,000	—
	#	0	0	1	1,115	63	1,115	—
	#	0	1	0	1,230	57	1,230	—
	#	0	1	1	1,345	52	1,345	65
	#	1	0	0	1,460	48	1,460	60
	#	1	0	1	1,575	45	1,575	56
	#	1	1	0	1,690	42	1,690	52
	#	1	1	1	1,805	39	1,805	49

“D” CABINET RISE 40° F TO 70° F	SWITCH SETTINGS FOR HEAT (0 = OFF, 1 = ON)				TE/TN – 115D – VD1 INPUT (BTU) 115,000
	1	2	3	4	CFM	TEMP RISE (° F)
	#	0	0	0	1,500	68
	#	0	0	1	1,615	63
	#	0	1	0	1,730	59
	#	0	1	1	1,845	55
	#	1	0	0	1,960	52
	#	1	0	1	2,075	49
	#	1	1	0	2,190	46
	#	1	1	1	2,305	44

Two openings are recommended for airflows above 1,600 CFM if the filter(s) is (are) adjacent to the furnace.

Temperature rises in the table are approximate. Actual temperature rises may vary.
Temperature rises shaded in grey are for reference only. These conditions are not recommended.
Rated static is .5″ ESP in W.C.

COOLING AIRFLOW

“B” CABINET
SWITCH SETTINGS (0 = OFF, 1 = ON)					CFM		NOMINAL A/C & HP CAPACITy
HEAT	COOL				CFM
1-4	5	6	7	8	LOW	HIGH
1	0	0	0	0	470	700					2 TON
1	0	0	0	1	510	760
1	0	0	1	0	550	820				2.5 TON
1	0	0	1	1	590	880
1	0	1	0	0	630	940
1	0	1	0	1	670	1000
1	0	1	1	0	710	1060			3 TON
1	0	1	1	1	750	1120
1	1	0	0	0	790	1180
1	1	0	0	1	830	1240		3.5 TON
1	1	0	1	0	870	1300
1	1	0	1	1	910	1360
1	1	1	0	0	950	1420
1	1	1	0	1	990	1480
1	1	1	1	0	1030	1540
1	1	1	1	1	1070	1600

“C” CABINET
SWITCH SETTINGS (0 = OFF, 1 = ON)					CFM		NOMINAL A/C & HP CAPACITy
HEAT	COOL				CFM
1-4	5	6	7	8	LOW	HIGH
#	0	0	0	0	685	1025						2.5 TON
#	0	0	0	1	730	1090					3 TON
#	0	0	1	0	775	1155
#	0	0	1	1	815	1220
#	0	1	0	0	860	1285				3.5 TON
#	0	1	0	1	905	1350
#	0	1	1	0	950	1415			4 TON
#	0	1	1	1	990	1480
#	1	0	0	0	1035	1545
#	1	0	0	1	1080	1610
#	1	0	1	0	1120	1675		5 TON
#	1	0	1	1	1165	1740
#	1	1	0	0	1210	1805
#	1	1	0	1	1255	1870
#	1	1	1	0	1295	1935
#	1	1	1	1	1340	2000

# Switch not used – can be 0 or 1

“D” CABINET
SWITCH SETTINGS (0 = OFF, 1 = ON)					CFM		NOMINAL A/C & HP CAPACITy
HEAT	COOL				CFM
1-4	5	6	7	8	LOW	HIGH
#	0	0	0	0	940	1400				3.5 TON
#	0	0	0	1	965	1440			4 TON
#	0	0	1	0	990	1480
#	0	0	1	1	1020	1520
#	0	1	0	0	1045	1560
#	0	1	0	1	1070	1600
#	0	1	1	0	1100	1640
#	0	1	1	1	1125	1680
#	1	0	0	0	1150	1720		5 TON
#	1	0	0	1	1180	1760
#	1	0	1	0	1205	1800
#	1	0	1	1	1235	1840
#	1	1	0	0	1260	1880
#	1	1	0	1	1285	1920
#	1	1	1	0	1315	1960
#	1	1	1	1	1340	2000

# Switch not used – can be 0 or 1

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.

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	Upflow	90	90	60	90
60,000	Downflow	30	90	30	90

80,000	Upflow	40	90	40	90
80,000	Downflow	30	90	30	90

100,000	Upflow	30	90	30	90
100,000	Downflow	30	90	25	90

115,000	Upflow	N/A	90	N/A	90
115,000	Downflow	N/A	90	N/A	90

*NOTES

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.

Two 45 degree elbows are equivalent to one 90 degree elbow.
This table applies for 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

SPECIFICATIONS

FG7TE/TN MODELS NUMBERS:	-060D-VB1	-080D-VC1	-100D-VC1	-115D-VD1
Input – Btuh (a)	60,000 / 39,000	80,000 / 52,000	100,000 / 65,000	115,000 / 74,750
Heating Capacity – Btuh	57,600 / 37,440	76,800 / 49,920	96,000 / 62,400	110,400 / 71,760
AFUE	96	96	96	96
Motor FLA	6.2	8.7	8.7	11.70
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	125lbs	135lbs	145lbs	160lbs

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

FG7TE/TN KITS
Description	SKU
2″ Concentric Vent Kit	904177
3″ Concentric Vent Kit	904176
2″ Concentric Vent Kit (Canadian Approved)	904952
3″ Concentric Vent Kit (Canadian Approved)	904953
“A” Cabinet Downflow Sub Base Kit	902974
“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, “D” Cabinet	904918
Side Return Filter Kit	541036
Neutralizer Kit	902377

LIMITED WARRANTY

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 (06/2017)

Documents / Resources

Literature Library FG7T Two Stage, Variable Speed, Condensing Upflow and Downflow Gas Furnaces [pdf] Owner's Manual
FG7T Two Stage Variable Speed Condensing Upflow and Downflow Gas Furnaces, FG7T, Two Stage Variable Speed Condensing Upflow and Downflow Gas Furnaces, Condensing Upflow and Downflow Gas Furnaces, Upflow and Downflow Gas Furnaces, Downflow Gas Furnaces

References

User Manual

Literature Library FG7T Two Stage, Variable Speed, Condensing Upflow and Downflow Gas Furnaces

Product Information

Product Usage Instructions