Nordyne Upfl ow/Horizontal, G7XA, G7XA046-A, G7XA061-B, G7XA076-B Installation Instructions Manual

...

GAS FURNACE

Installation Instructions

G7XA Series - Single Stage High Efﬁ ciency Furnace

80+ AFUE

Upﬂ ow/Horizontal Model

WARNING:

• PROPOSITION 65 WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects or other reproductive harm.

• This furnace is not approved for installation in mobile homes. Installing this furnace in a mobile home could cause ﬁ re, property damage, and/or personal injury.

ATTENTION INSTALLERS:

It is your responsibility to know this product better than your customer. This includes being able to install the product according to strict safety guidelines and instructing the customer on how to operate and maintain the equipment for the life of the product. Safety should always be the deciding factor when installing this product and using common sense plays an important role as well. Pay attention to all safety warnings and any other special notes highlighted in the manual. Improper installation of the furnace or failure to follow safety warnings could result in serious injury, death, or property damage.

These instructions are primarily intended to assist qualiﬁ ed individuals experienced in the proper installation of this appliance. Some local codes require licensed installation/service personnel for this type of equipment. Please read all instructions carefully before starting the installation. Return these instructions to the customer’s package for future reference.

WARNING:

FIRE OR EXPLOSION HAZARD

• Failure to follow safety warnings exactly could result in serious injury or property damage.

• Installation and service must be performed by a qualiﬁ ed installer, service agency or the gas supplier.

• Do not store or use gasoline or other ﬂ ammable vapors and liquids in the vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not

use any phone in your building.

• Leave the building immediately.

• Immediately call your gas supplier from a

neighbors phone. Follow the gas suppliers instructions.

• If you cannot reach your gas supplier, call

the ﬁ re department.

DO NOT DESTROY THIS MANUAL

KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

TABLE OF CONTENTS

SAFETY INFORMATION .............................................4

REQUIREMENTS AND CODES .................................. 4

GENERAL INSTRUCTIONS ........................................ 4

Combustion Air Quality ...........................................4

Clearances to Combustible Materials .....................4

Installation in a Garage ...........................................6

Heating Load ...........................................................6

COMBUSTION AIR REQUIREMENTS .......................6

General Information ................................................6

Installation in a Conﬁ ned Space ..............................6

Air From Inside ...................................................6

Outdoor Air Using a Crawl Space or

Vented Attic ........................................................ 6

Outdoor Air Using Vertical Ducts ........................7

Outdoor Air Using Horizontal Ducts ...................7

Air Directly Through an Exterior Wall .................7

Installation in an Unconﬁ ned Space ........................ 8

VENTING REQUIREMENTS ........................................8

Category I Venting ...................................................8

CIRCULATING AIR REQUIREMENTS ........................9

Plenums and Air Ducts ............................................ 9

Supply Air Connections ...........................................9

Return Air Connections ...........................................9

Side Return Installations .....................................9

Bottom Return Installations ................................. 9

FURNACE INSTALLATION ....................................... 10

General Requirements .......................................... 10

Upﬂ ow Installation ................................................. 10

Side Return Air Inlet ......................................... 10

Bottom Return Air Inlet .....................................10

Horizontal Installation ............................................ 10

Bottom Panel Removal ..................................... 10

Alternate Bottom Panel Removal ..................... 11

GAS SUPPLY AND PIPING ....................................... 11

Leak Check ........................................................... 11

High Altitude Application........................................ 12

Conversion to LP/Propane ....................................13

ELECTRICAL WIRING ............................................... 13

Low Voltage Wiring ................................................ 13

Line Voltage Wiring ................................................13

Twinning ................................................................. 14

Grounding .............................................................. 15

START-UP & ADJUSTMENTS ...................................15

Pre-Start Checklist ................................................15

Start-Up Procedures ..............................................15

Verifying and Adjusting Input Rate ........................15

Verifying and Adjusting Temperature Rise .............16

Verifying Burner Operation ....................................16

Verify Operation of the Supply Air Limit Switch .....16

OPERATING SEQUENCE .........................................17

Heating Cycle ........................................................17

Cooling Cycle ........................................................17

Fan Mode ..............................................................17

MAINTENANCE .........................................................17

Air Filters ...............................................................17

Blower Compartment ............................................17

Cleaning of Burners ..............................................18

Cleaning of Flue Passages ...................................18

Heat Exchanger and Burner Maintenance ............18

Lubrication ............................................................18

Vent System ..........................................................19

DESCRIPTION OF COMPONENTS ..........................19

TROUBLESHOOTING ...............................................20

FIGURES AND TABLES ............................................21

Figure 16 - Furnace Dimensions ......................21

Airﬂ ow Data ...........................................................22

Table 5 - Maximum Airﬂ ow and Temp Rises .....22

Electrical Information.............................................24

Figure 17 - Wiring Diagram ..............................24

Gas Information .....................................................25

Table 6 - Gas Flow Rates.................................25

Table 7 - Gas Pipe Capacities .........................25

Table 8 - High Altitude Deration Chart for

Natural Gas .......................................26

Table 9 - High Altitude Deration Chart for

Propane Gas .....................................26

Location of Furnace Components .........................27

Figure 18 - Upﬂ ow/Horizontal Gas Furnace

Components ..................................27

INSTALLATION/PERFORMANCE CHECKLIST .......28

SAFETY INFORMATION

Safety markings are used frequently throughout this

manual to designate a degree or level of seriousness and should not be ignored. WARNING indicates a potentially hazardous situation that if not avoided, could result in personal injury or death. CAUTION indicates a potentially hazardous situation that if not avoided, may result in minor or moderate injury or property damage.

WARNING:

The safety information listed below must be followed during the installation, service, and operation of this furnace. Failure to follow safety recommendations could result in possible damage to the equipment, serious per

injury or death

• Use only with type of gas approved for this furnace. Refer to the furnace rating plate.

• Install this furnace only in a location and position as speciﬁ ed in Table 1 (page 5).

• Provide adequate combustion and ventilation air to the furnace space as speciﬁ ed on pages 6 - 8.

• Combustion products must be discharged outdoors. Connect this furnace to an approved vent system only, as speciﬁ ed on page 8.

• Never test for gas leaks with an open ﬂ ame. Use a commercially available soap solution to check all connections (page 11).

• This furnace is designed to operate with a maximum external pressure rise of 0.5 inches of water column. Consult Table 5 (pages 22 - 23), and the rating plate for the proper circulating air ﬂ ow and temperature rise. NOTE: It is important that the duct system be designed to handle the desired ﬂ ow rate and temperature rise. An improperly designed duct system can result in nuisance shutdowns, and comfort or noise issues.

• When supply ducts carry air circulated by the furnace to areas outside the space containing the furnace, the return air shall also be handled by duct(s) sealed to the furnace casing and terminating outside the space containing the furnace. See page 9.

• A gas-ﬁ red furnace for installation in a residential garage must be installed as speciﬁ ed on page 6.

sonal

GENERAL INSTRUCTIONS

Combustion Air Quality

CAUTION:

Combustion air must not be drawn from a corrosive atmosphere.

To maximize heat exchanger life, the combustion air must be free of chemicals that can form corrosive acidic compounds in the combustion gases. The recommended source of combustion air is to use outdoor air. However, the use of indoor air in most applications is acceptable except as listed:

• If the furnace is installed in a conﬁ ned space it is required that the necessary combustion air come from the outdoors by way of attic, crawl space, air duct, or direct opening. For installations in conﬁ ned spaces, see pages 6 - 7 for combustion air requirements.

• Installation in these locations may require outdoor air for combustion, due to chemical exposures:

Commercial buildings Buildings with indoor pools Furnaces installed in laundry rooms Furnaces installed in hobby or craft rooms Furnaces installed near chemical storage areas

• Exposure to the following substances in the combustion air supply may require outdoor air for combustion:

Permanent wave solutions Chlorinated waxes and cleaners Chlorine based swimming pool chemicals Water softening chemicals De-icing salts or chemicals Carbon Tetrachloride Halogen type refrigerants Cleaning solvents (Perchloroethylene) Printing inks, paint removers, varnishes, etc. Hydrochloric Acid Cements and glues Antistatic fabric softeners Masonry acid washing materials

REQUIREMENTS AND CODES

This furnace must be installed in accordance with these instructions, all applicable local building codes or the current revision of the International Fuel Gas Code.

Any additional codes shown are for reference purposes only and do not necessarily have jurisdiction over local or state codes. Always consult with local authorities before installing any gas appliance.

Clearances to Combustible Materials

Access for positioning and servicing the unit must be considered when locating unit. The need to provide clearance for access to panels or doors may require clearance distances over and above the requirements.

Allow 24 inches minimum clearance from the front of the unit. However, 36 inches is strongly recommended.

Speciﬁ c clearance information can be found on the furnace rating plate.

UPFLOW/HORIZONTAL INSTALLATION CLEARANCES*

Left Side .................0 Inches Back ...........................0 Inches

Right Side ............. 0 Inches Top .............................0 Inches

Vent ...........................1 Inch

Allow 24 in. minimum clearance for servicing.

Recommended clearance is 36 in.

†

The IFGC requires that single wall metal vent connectors

must maintain a minimum 5” clearance to combustibles, including the outer casing of the furnace.

NOTE: This furnace is listed for installation on combustible or non-combustible ﬂ ooring. However, wood is the only combustible ﬂ ooring allowed for installation.

Front......................... 4 Inches

Table 1. Minimum Clearances to Combustible Materials

WARNING:

†

TOP

LEFT SIDE

BOTTOM

HORIZONTAL APPLICATION

UPFLOW APPLICATION

RIGHT SIDE

SIDE

TOP

BOTTOM

SIDE

CARBON MONOXIDE POISONING HAZARD

Failure to follow the steps outlined below for each appliance connected to the venting system

being placed into operation could result in carbon monoxide poisoning or death. The following steps shall be followed with each individual appliance connected to the venting system being placed in operation, while all other appliances connected to the venting system are not in operation:

1. Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and horizontal pitch, as required in the National

Fuel Gas Code, ANSI Z223. 1/NFPA 54 or the CSA B149.1, Natural Gas and Propane Installation Codes and these instructions. Determine that there is no blockage or restriction, leakage,

corrosion and other deﬁ ciencies which could cause an unsafe condition.

3. As far as practical, close all building doors and windows and all doors between the space in which the appliance(s) connected to the venting system are located and other spaces of the building.

4. Close ﬁ replace dampers.

5. Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they are operating at maximum speed. Do not operate a summer exhaust fan.

6. Follow the lighting instructions. Place the appliance being inspected into operation. Adjust the thermostat so appliance is operating continuously.

7. Test for spillage from draft hood equipped appliances at the draft hood relief opening after 5 minutes of main burner operation. Use the ﬂ ame of a match or candle.

8. If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CSA B149.1, Natural Gas and Propane Installation Codes.

9. After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, ﬁ replace dampers and any other gas-ﬁ red burning appliance to their previous conditions of use.

Installation in a Garage

WARNING:

Do not place combustible material on or against the furnace cabinet or within 6 inches of the vent pipe. Do not place combustible materials, including gasoline and any other ﬂ ammable vapors and liquids, in the vicinity of the furnace.

This Gas-ﬁ red furnace may be installed in a residential garage with the provision that the burners and igniter are located no less than 18 inches (457mm) above the ﬂ oor. The furnace must be located or protected to prevent physical damage by vehicles.

Heating Load

The ductwork should be appropriately sized to the capacity of the furnace to ensure its proper airﬂ ow rating. For installations above 2,000 ft., the furnace should have a sea level input rating large enough that it will meet the heating load after deration for altitude. Excessive

oversizing of the furnace could cause the furnace and/or vent to fail prematurely.

COMBUSTION AIR REQUIREMENTS

Provisions must be made during the installation of this furnace that provide an adequate supply of air for combustion.

Installation In A Conﬁ ned Space

A conﬁ ned space is an area with volume less than 50 cubic feet per 1,000 Btuh of the combined input rates of all appliances drawing combustion air from that space. Furnace closets, small equipment rooms and garages are conﬁ ned spaces. Furnaces installed in a conﬁ ned space which supply heated air to areas outside the space must draw return air from outside the space and must have the return air ducts tightly sealed to the furnace.

NOTE: The required sizing of these openings is determined by whether inside or outside air is used to support combustion, the method by which the air is brought to the space, and by the total input rate of all appliances in the space. In all cases, the minimum dimension of any combustion air opening is 3 inches.

Air From Inside If combustion air is taken from the heated space, the two openings must each have a free area of at least one square inch per 1,000 Btuh of total input of all appliances in the conﬁ ned space, but not less than 100 square inches of free area (Figure 1). See example.

Example:

If the combined input rate of all appliances is less than or equal to 100,000 Btuh, each opening must have a free area of at least 100 square inches. If the combined input rate of all appliances is 120,000 Btuh, each opening must have a free area of at least 120 square inches.

General Information

• Instructions for determining the adequacy of an installation can be found in the current revision of the IFGC.

Consult local codes for special requirements.

CAUTION:

Exhaust fans, clothes dryers, ﬁ replaces and other appliances that force air from the house to the outdoors can create a negative pressure inside the house, resulting in improper furnace operation or unsafe conditions such as ﬂ ame roll out. It is imperative that sufﬁ cient air exchange with the outdoors is provided to prevent depressurization.

• Air openings on top of the furnace and in closet doors or walls must never be restricted. If the furnace is operated without adequate air for combustion, the ﬂ ame roll-out switch will open, turning off the gas supply to the burners. This safety device is a manually reset

switch. DO NOT reset or install jumper wires across this switch to defeat its function without identifying and correcting the fault condition. If the switch must

be replaced, use only the correct sized part speciﬁ ed in the Replacement Parts List provided online.

Vent or

Chimney

NOTES: Each opening must be at least 100 sq. in. or 1 sq. in. per 1,000 Btuh of total input rating, whichever is greater.

Openings must start at no more than 12 inches from the top and bottom of the enclosure.

Water Heater

Total Input Rating

(Btuh)

40,000 100 sq. In 12 inches 60,000 100 sq. In 12 inches

80,000 100 sq. In 12 inches 100,000 100 sq. In 12 inches 120,000 120 sq. In 13 inches 140,000 140 sq. In 14 inches 160,000 160 sq. In 15 inches

Minimum Free Area

(Each Opening)

12" Max.

Furnace

See Notes

12” Max.

See

Notes

Round Duct

Diameter

Figure 1. Combustion Air Drawn from Inside

Outdoor Air from a Crawl Space or Vented Attic When the openings can freely exchange air with the outdoors, each opening shall have a minimum free area of 1 square inch per 4,000 Btuh of total appliance input.

The openings shall exchange directly, or by ducts, with the outdoor spaces (crawl or attic) that freely exchange with the outdoors (Figure 2).

Ventilation louvers

Vent or

Chimney

Attic Insulation

at each end of attic

Outlet air duct must be at least 1 sq. in. per 4,000 Btuh of total input rating. Must

Water Heater

Furnace

extend above attic insulation

Inlet air duct must be at least 1 sq. in. per 4,000 Btuh of total input rating.

Crawl Space

Ventilated Louvers for unheated crawl space

Figure 2. Combustion Air Drawn from a Crawl

Space or Vented Attic

Outdoor Air Using Vertical Ducts If combustion air is taken from outdoors through vertical ducts, the openings and ducts must have a minimum free area of one square inch per 4,000 Btuh of total appliance input. In installations drawing combustion air from a ventilated attic, both air ducts must extend above the attic insulation (Figure 3).

Ventilation Louvers at each end of attic

Vent or Chimney

Water Heater

Total Input Rating

(Btuh)

Attic

Insulation

Furnace

12" Max

Minimum Free Area

(Each Opening)

Outlet Air Duct must be at least 1 sq. in. per 4,000 Btuh of total input rating.

Inlet and Outlet Ducts must extend above attic insulation.

Inlet Air Duct must be at least 1 sq. in. per 4,000 Btuh of total input rating.

Round Duct

Diameter

40,000 100 sq. In 12 inches 60,000 100 sq. In 12 inches

80,000 100 sq. In 12 inches 100,000 100 sq. In 12 inches 120,000 120 sq. In 13 inches 140,000 140 sq. In 14 inches 160,000 160 sq. In 15 inches

Figure 3. Combustion Air Drawn from Outside

Through Vertical Ducts

Outdoor Air Using Horizontal Ducts If combustion air is taken from outdoors through horizontal ducts, the openings and ducts must have a minimum free area of one square inch per 2,000 Btuh of total appliance input (Figure 4).

Vent or

Chimney

12" Max

See

Note

12" Max

Total Input Rating

(Btuh)

Water Heater

Air Duct

Furnace

Air Duct

Minimum Free Area

(Each Opening)

NOTE: Each

opening to outside must be at least 1 sq. in. per 2,000 Btuh of total

input rating.

Round Duct

Diameter

40,000 10 sq. In 5 inches 60,000 15 sq. In 6 inches

80,000 20 sq. In 7 inches 100,000 25 sq. In 8 inches 120,000 30 sq. In 9 inches 140,000 35 sq. In 10 inches 160,000 40 sq. In 10 inches

Figure 4. Combustion Air Drawn from Outside

Through Horizontal Ducts

Air Directly Through An Exterior Wall If combustion air is provided directly through an exterior wall, the two openings must each have free area of at least one square inch per 4,000 Btuh of total appliance input (Figure 5).

Vent or

12" Max

See

Note

12" Max

Total Input Rating

(Btuh)

40,000 10 sq. In 4 inches

60,000 15 sq. In 5 inches

80,000 20 sq. In 5 inches

100,000 25 sq. In 6 inches 120,000 30 sq. In 6 inches 140,000 35 sq. In 7 inches 160,000 40 sq. In 8 inches

Chimney

Furnace

Water Heater

Minimum Free Area

(Each Opening)

NOTE: Each opening

to outside must be at least 1 sq. in. per 4,000 Btuh of total input rating.

Round Duct

Diameter

Figure 5. Combustion Air Drawn from Outside

Through an Exterior Wall

Installation In An Unconﬁ ned Space

An unconﬁ ned space is an area including all rooms not separated by doors with a volume greater than 50 cubic feet per 1,000 Btuh of the combined input rates of all appliances which draw combustion air from that space.

In general, a furnace installed in an unconﬁ ned space will not require outside air for combustion. However, in homes built for energy efﬁ ciency (low air change rates), it may be necessary to provide outside air to ensure adequate combustion and venting, even though the furnace is located in an unconﬁ ned space. See example.

Example: A space with a water heater rated at 45,000 Btuh input and a furnace rated at 75,000 Btuh requires a volume of 6,000 cubic feet [50 x (45 + 75) = 6,000] to be considered unconﬁ ned. If the space has an 8 foot ceiling, the ﬂ oor area of the space must be 750 square feet (6,000 / 8 = 750).

VENTING REQUIREMENTS

WARNING:

Upon completion of the furnace installation, carefully inspect the entire ﬂ ue system both inside and outside the furnace to assure it is properly sealed. Leaks in the ﬂ ue system can result in serious personal injury or death due to exposure of ﬂ ue products, including carbon monoxide.

This furnace must be vented in compliance with the current revision of the International Fuel Gas Code and the instructions provided below. Consult local codes for

special requirements.

Category I Venting

This furnace is listed as a Category I vented appliance. Category I furnaces generally operate with a slight negative pressure (draft) and must be vented vertically or near vertically. Additionally it is important to guard against excessive condensation.

IMPORTANT NOTE: This furnace must never be vented to a chimney or ﬂ ue that services a ﬁ replace or other appliance designed to burn solid fuel. If the furnace vent is to be connected to a chimney serving a ﬁ replace, the ﬁ replace must be sealed off from the chimney.

WARNING:

Venting into an unlined masonry chimney or concrete chimney is prohibited. This may result in improper draft and excess condensation forming in the chimney.

• This furnace may be vented with a dedicated venting system or common vented with other Category I appliances. The vent system dimensions and material must conform to local Codes.

• The venting system should be designed to have the minimum number of elbows or turns. All horizontal runs shall slope upwards from the furnace at ¼ inch per running foot of vent. Supports for the vent pipe must be installed a minimum of every ﬁ ve feet along the vent run to ensure no displacement after installation.

IMPORTANT NOTE: Under no circumstances shall any portion of the vent system extend into or pass through any return air duct, supply air duct, or plenum.

• Single wall vent connectors may be used under the limited capacity ranges found in the vent sizing tables.

It is recommended that Type “B” double wall vent be used for the connector whenever possible. An

existing masonry chimney should be inspected and relined if necessary.

• Single wall metal vertical vents shall not be used for

Category I venting. The furnace vent, if metal, may be insulated if local codes allow. Any part of the vent system, metal vent only, not exposed to weather, but which are exposed to temperatures below 35° F (1° C) must be insulated to prevent condensation. All vent insulation shall be foil backed ﬁ berglass of one inch minimum thickness.

• Sheet metal fasteners should be used to secure the vent

pipe to the furnace ﬂ ue.

• When an existing furnace is removed from a vent system

serving other appliances, the existing vent system may no longer be sized to properly vent the remaining appliances. An improperly sized venting system can result in the formation of condensate, leakage, or spillage. The existing vent system should also be checked to make sure it is in compliance with local codes. If it isn’t, the vent system must be brought into compliance before installing the furnace.

• Category I furnace installations must be connected to a factory built vent complying with a recognized standard, or a masonry or concrete chimney lined with a lining material acceptable to the authority having jurisdiction.

CIRCULATING AIR REQUIREMENTS

WARNING:

• Do not allow combustion products to enter the

circulating air supply. Failure to prevent the circulation of combustion products into the living space can create potentially hazardous conditions including 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 conﬁ ned spaces, all return ductwork must be adequately sealed. When return air is provided through the bottom of the furnace, the joint between the furnace and the return air plenum must be air tight.

• The surface that the furnace is mounted on must

provide sound physical support of the furnace with no gaps, cracks or sagging between the furnace and the ﬂ oor or platform.

• Return air and circulating air ductwork must

not be connected to any other heat producing device such as a ﬁ replace insert, stove, etc. This may result in ﬁ re, explosion, carbon monoxide poisoning, personal injury, or property damage.

Plenums and Air Ducts

• Supply and return air must be delivered to the furnace

by duct(s) secured to the furnace casing, running full size and without interruption.

• Table 5 (pages 22 - 23) contains the maximum airﬂ ow

and temperature rise data for each furnace input rate. NOTE: If the maximum airﬂ ow is 1,600 CFM or more, it is recommended that two openings be used for return air on upﬂ ow furnaces.

• It is recommended that the outlet duct contain a

removable access panel that is accessible when the furnace is installed in service. The opening shall be of a size that smoke or reﬂ ected light may be observed inside the casing to indicate the presence of leaks in the heat exchanger. The cover for the opening shall be attached in such a manner as to prevent leaks.

• If outside air is used as return air to the furnace for

ventilation or to improve indoor air quality, the system must be designed so that the return air is not less than 60° F (15° C) during operation. If a combination of indoor and outdoor air is used, the ducts and damper system must be designed so that the return air supply to the furnace is equal to the return air supply under normal, indoor return air applications.

• If a cooling system is installed which uses the furnace

blower to provide airﬂ ow over the indoor coil, the coil

must be installed downstream (on the outlet side) of the furnace or in parallel with the furnace.

• If a cooling system is installed in parallel with the furnace, a damper must be installed to prevent chilled air from entering the furnace and condensing on the heat exchanger. If a manually operated damper is installed, it must be designed so that the furnace will not operate when the damper is in the cooling position or when in heating position, the cooling system is inoperable.

• It is good practice to seal all connections and joints with industrial grade sealing tape or liquid sealant. Requirements for sealing ductwork vary from region to region. Consult with local codes for specific requirements.

Supply Air Connections

To attach the supply air duct to the furnace, bend the furnace ﬂ anges (Figure 16, page 21) upward 90° with wide duct pliers. Position the duct on top of the furnace and secure together with sheet metal screws. The screws must penetrate the sheet metal casing and furnace ﬂ ange. Tape or seal all seams if required by local code.

Return Air Connections

For upﬂ ow installations, the return air ductwork may be connected to the left side, right side, or bottom. The bottom panel (Figure 16) must be installed for left or right return air. Do not use the back of the furnace for return air.

Side Return Installations

WARNING:

The solid base of the furnace must be in place when the furnace is installed with side return air ducts. Removal of all or part of the base could cause circulation of combustible products into the living space and create potentially hazardous conditions, including carbon monoxide poisoning that could result in personal injury or death.

To attach the return air duct to the left or right side of the furnace, punch out the four knockouts (Figure 16) from the preferred side of the furnace. Using sharp metal cutters, cut an opening between all four knockouts to expose the blower assembly. Position the return air duct over the opening in the side and secure together with sheet metal screws. The screws must penetrate the duct and furnace cabinet.

Bottom Return Installations The bottom panel (Figure 16) must be removed from the bottom of the furnace for bottom return air. Refer to pages 10 - 11 for removal instructions. Position the furnace over the return air duct and secure together with sheet metal screws. The screws must penetrate the duct and furnace cabinet.

+ 19 hidden pages

Nordyne Upfl ow/Horizontal, G7XA, G7XA046-A, G7XA061-B, G7XA076-B Installation Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual