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GAS FURNACE
Installation Instructions
G7XA Series - Single Stage High Effi ciency Furnace
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.
Upfl ow/Horizontal Model
• 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.
• 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.
KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
WARNING:
FIRE OR EXPLOSION HAZARD
WHAT TO DO IF YOU SMELL GAS
DO NOT DESTROY THIS MANUAL
80 + AFUE
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Table of Contents
Related Manuals for Nordyne Upfl ow/Horizontal
Summary of Contents for Nordyne Upfl ow/Horizontal
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Page 1: Gas Furnace
80 + AFUE GAS FURNACE Installation Instructions G7XA Series - Single Stage High Effi ciency Furnace Upfl ow/Horizontal Model WARNING: WARNING: • PROPOSITION 65 WARNING: This product FIRE OR EXPLOSION HAZARD contains chemicals known to the state of • Failure to follow safety warnings exactly California to cause cancer, birth defects or could result in serious injury or property other reproductive harm. -
Page 3: Table Of Contents
TABLE OF CONTENTS SAFETY INFORMATION ..........4 START-UP & ADJUSTMENTS ........15 Pre-Start Checklist ..........15 REQUIREMENTS AND CODES ........4 Start-Up Procedures ..........15 GENERAL INSTRUCTIONS ........4 Verifying and Adjusting Input Rate ......15 Combustion Air Quality ...........4 Verifying and Adjusting Temperature Rise .....16 Clearances to Combustible Materials .....4 Verifying Burner Operation ........16 Installation in a Garage ...........6 Verify Operation of the Supply Air Limit Switch ..16... -
Page 4: Safety Information
SAFETY INFORMATION GENERAL INSTRUCTIONS Safety markings are used frequently throughout this Combustion Air Quality manual to designate a degree or level of seriousness and CAUTION: should not be ignored. WARNING indicates a potentially hazardous situation that if not avoided, could result in Combustion air must not be drawn from a personal injury or death. - Page 5 UPFLOW/HORIZONTAL INSTALLATION CLEARANCES* UPFLOW APPLICATION Left Side ....0 Inches Back ......0 Inches Right Side ..... 0 Inches Top ......0 Inches † Vent ......1 Inch Front......4 Inches Allow 24 in. minimum clearance for servicing. SIDE Recommended clearance is 36 in. †...
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Page 6: Installation In A Garage
Installation in a Garage Installation In A Confi ned Space A confi ned space is an area with volume less than 50 WARNING: cubic feet per 1,000 Btuh of the combined input rates of all appliances drawing combustion air from that space. Do not place combustible material on or Furnace closets, small equipment rooms and garages are against the furnace cabinet or within 6 inches... -
Page 7: Outdoor Air Using Vertical Ducts
The openings shall exchange directly, or by ducts, with the outdoor spaces (crawl or attic) that freely exchange with the outdoors (Figure 2). Vent or Chimney Ventilation louvers at each end of attic Vent or 12" Max Chimney - - - - - - - NOTE: Each - - -... -
Page 8: Installation In An Unconfi Ned Space
Installation In An Unconfi ned Space WARNING: An unconfi ned space is an area including all rooms not separated by doors with a volume greater than 50 cubic Venting into an unlined masonry chimney or feet per 1,000 Btuh of the combined input rates of all concrete chimney is prohibited. -
Page 9: Circulating Air Requirements
CIRCULATING AIR REQUIREMENTS must be installed downstream (on the outlet side) of the furnace or in parallel with the furnace. WARNING: • If a cooling system is installed in parallel with the furnace, a damper must be installed to prevent chilled air Do not allow combustion products to enter the from entering the furnace and condensing on the heat •... -
Page 10: Furnace Installation
FURNACE INSTALLATION The furnace is shipped with the bottom panel installed. If furnace is installed horizontally, remove the bottom panel G7XA series gas furnaces are shipped ready for installation from the furnace before attaching the duct system. See in the upfl ow or horizontal right or left positions. Access Bottom Panel Removal section. -
Page 11: Alternate Bottom Panel Removal
GAS SUPPLY AND PIPING All gas piping must be installed in compliance with local codes and utility regulations. IMPORTANT NOTES: • Some local regulations require the installation of a manual main shut-off valve and ground joint union external to the furnace as shown in Figure 10 (page 12). -
Page 12: High Altitude Application
IMPORTANT NOTE: When pressure testing gas supply be reduced 8% at 2,000 feet, 12% at 3,000 feet, etc. This lines at pressures greater than 1/2 psig (14 inch W.C.), deration is in reference to the input rate and gas heating the gas supply piping system must be disconnected value at sea level. -
Page 13: Conversion To Lp/Propane
When deration is completed, it is required that you measure ELECTRICAL WIRING the gas input rate. This may be accomplished in the usual Electrical connections must be in compliance with all way, by clocking the gas meter and using the local gas applicable local codes. -
Page 14: Twinning
Furnace Furnace Cabinet Nominal Maximum Minimum Maximum Minimum Maximum Model Input Width Electrical Operating Operating Furnace Wire Fuse or Circuit Number (Btu/hr) (in.) Supply Voltage Voltage Amperes Gauge Breaker Amps** G7XA ¼ 046-23A 46,000 230-50-1 061-24B 61,000 ½ 230-50-1 ½ 076-24B 76,000 230-50-1... -
Page 15: Grounding
Grounding 1. Shut off all other gas fi red appliances. 2. Start the furnace and run it for at least 3 minutes. WARNING: 3. Measure the time (in seconds) required for the gas meter to complete one revolution. To minimize personal injury, the furnace cabinet 4. -
Page 16: Verifying And Adjusting Temperature Rise
Verifying and Adjusting Temperature Rise Verifying Burner Operation Confi rm the temperature rise through the furnace is CAUTION: within the limits specifi ed on the furnace rating plate. Any temperature rise outside the specifi ed limits could result The door over the burners may only be open in premature failure of the heat exchanger. -
Page 17: Operating Sequence
OPERATING SEQUENCE MAINTENANCE The operating sequences for the heating, cooling, WARNING: and fan modes are described below. Refer to the fi eld and furnace wiring diagrams: (Figure 11, page 13), These maintenance instructions are primarily (Figure 12, page 14), and (Figure 17, page 24). intended to assist qualified technicians Heating Cycle experienced in the proper maintenance and... -
Page 18: Cleaning Of Burners
Cleaning of Burners 8. Remove the piping between the gas valve and the If the burners must be cleaned, follow steps 1-12. Refer ground-joint union. (If applicable). to Figure 18 (page 27) for component locations. 9. Remove all screws securing the burner assembly to the furnace. -
Page 19: Vent System
DESCRIPTION OF COMPONENTS WARNING: The descriptions below are various functional components that affect the operation and shutting down of the furnace. Holes in the vent pipe or heat exchanger can Some of these components and their locations are shown cause combustion products to enter the home. in Figure 18 (page 27). -
Page 20: Troubleshooting
TROUBLESHOOTING If the furnace fails to operate check the following: Green Diagnostic Description • Is the thermostat operating properly? • Are the blower compartment door(s) in place? Control Fault (No Power) • Is the furnace disconnect closed? L1/Neutral Polarity Fault Flash Flash •... -
Page 21: Figures And Tables
FIGURES AND TABLES *XA 80+ Upfl ow/Horizontal Furnace Dim. Dim. Dim. Dim. TOP VIEW Model #’s “A” “B” “C” “D” FRONT BRACE ¼ ¾ ⅝ ⅞ 046E-23A 061E-24B ½ ¾ ⅞ ⅛ 076E-24B FLANGES ⅜ ⅞ 092E-35C BOTTOM PANEL ½ ½... -
Page 22: Airfl Ow Data
AIRFLOW DATA *G7XA UPFLOW / HORIZONTAL GAS FURNACE External Static Pressure (in.w.c.) Motor Switch Heating Model Setting Input Number (Btuh) 1/5 2/6 3/7 4/8 CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise 0 1000 XA046-A 46,000... - Page 23 G7XA UPFLOW / HORIZONTAL GAS FURNACES External Static Pressure (in.w.c.) Motor Switch Heating Model Setting Input Number (Btuh) 1/5 2/6 3/7 4/8 CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise 0 1125 1040 0 1205 1120...
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Page 24: Electrical Information
ELECTRICAL INFORMATION COOL HEAT FAN SPEED HIGH HEAT COOL XFMR R C Y G W Figure 17. Wiring Diagram for G7XA Upfl ow Furnace... -
Page 25: Gas Information
GAS INFORMATION GAS FLOW RATES (CUBIC FEET PER HOUR) TIME FOR CUBIC FEET PER REVOLUTION TIME FOR CUBIC FEET PER REVOLUTION ONE REVOLUTION OF GAS METER ONE REVOLUTION OF GAS METER (SECONDS) (SECONDS) 1,800 3,600 1,500 3,000 1,286 2,571 1,125 2,250 1,000 2,000... -
Page 26: Natural Gas
NATURAL GAS INPUT (BTU) ALTITUDE ABOVE SEA LEVEL 46,000 61,000 76,000 107,000 ORIFICE SIZE 0 to 1,999 FT 10.0 10.0 10.0 10.0 MANIFOLD PRESSURE ORIFICE SIZE 2,000 to 2,999 FT MANIFOLD PRESSURE ORIFICE SIZE 3,000 to 4,999 FT MANIFOLD PRESSURE ORIFICE SIZE 5,000 to 5,999 FT 10.0... -
Page 27: Location Of Furnace Components
LOCATION OF FURNACE COMPONENTS ITEM COMPONENT NAME Blower Assembly Blower Door Switch Burner Assembly STATUS FLAME BLOWER DELAY Flame Roll-Out Switch Flame Sensor Furnace Control Board Gas Manifold Gas Valve Igniter Inducer Assembly Main Air Limit Switch Motor Control Board Pressure Switch Transformer Figure 18. -
Page 28: Installation/Performance Checklist
INSTALLATION/PERFORMANCE CHECK LIST ELECTRICAL SYSTEM: INSTALLER NAME: Electrical connections tight? Line voltage polarity correct? CITY _______________ STATE _____________ Supply Voltage: ______________________ VOLTS INSTALLATION ADDRESS: Has the thermostat been calibrated? Is the thermostat level? CITY _______________ STATE _____________ Is the heat anticipator setting correct? UNIT MODEL # GAS SYSTEM:...