Nordyne G7XC Series, Installation Instructions Manual, Page: 2 / 36

2
SAFETY INFORMATION .............................................3
REQUIREMENTS AND CODES ..................................3
GENERAL INSTRUCTIONS ........................................4
Combustion Air Quality ............................................4
Clearances to Combustible Materials ......................4
Installation in a Garage ............................................4
Heating Load ...........................................................4
COMBUSTION AIR REQUIREMENTS ........................4
General Information .................................................4
Conventional Furnaces - Confi ned Spaces .............6
Air From Inside ....................................................6
Outdoor Air from a Crawl Space or
Vented Attic .........................................................6
Outdoor Air Using Vertical Ducts ........................6
Outdoor Air Using Horizontal Ducts ....................7
Air Directly Through an Exterior Wall .................7
Conventional Furnaces - Unconfi ned Spaces .........7
Direct Vent Furnaces ...............................................8
VENTING REQUIREMENTS ........................................8
Vent Pipe Material ...................................................8
Vent Pipe Length and Diameter ...............................8
Vent Pipe Installation ...............................................8
Outdoor Terminations - Horizontal Venting ..............9
Outdoor Terminations - Vertical Venting ................. 10
Vent Freezing Protection ....................................... 10
Condensate Disposal ............................................ 10
Existing Installations .............................................. 10
CIRCULATING AIR REQUIREMENTS ......................11
Plenums and Air Ducts ..........................................11
Supply Air Connections ........................................11
Return Air Connections ........................................11
Side Return Installations ..............................11
Bottom Return Installations ..........................11
FURNACE INSTALLATION .......................................12
General Requirements ..........................................12
Direct Vent (2 - Pipe) Applications ........................12
Upfl ow Installation .................................................12
Side Return Air Inlet ........................................12
Bottom Return Air Inlet ....................................12
Horizontal Installation ...........................................12
Bottom Panel Removal .........................................13
Alternate Bottom Panel Removal .....................13
Inducer Assembly Rotation ...................................13
Vent and Inducer Assembly Options .....................14
Accessories ...........................................................14
Finish Flange .....................................................14
Rubber Grommets .............................................14
PVC Tee, Reducer, & Hose Barbs ......................15
Condensate Drain Lines ....................................15
Optional PVC pipe Installation ............................16
GAS SUPPLY AND PIPING .......................................16
Leak Check .........................................................16
High-Altitude Application ......................................17
Conversion to LP/Propane ...................................18
ELECTRICAL WIRING ...............................................18
Low Voltage Wiring ..............................................18
Line Voltage Wiring ..............................................18
Twinning ...............................................................19
Grounding ............................................................20
START-UP & ADJUSTMENTS ...................................20
Pre-Start Checklist .................................................20
Start-Up Procedures ..............................................20
Verifying and Adjusting Input Rate .........................20
Verifying and Adjusting Temperature Rise .............21
Verifying Burner Operation ....................................21
Verifying Operation of the supply Air Limit
Switch ....................................................................21
OPERATING SEQUENCE .........................................22
Heating Cycle ........................................................22
Cooling Cycle .........................................................22
Fan Mode ...............................................................22
MAINTENANCE .........................................................22
Air Filters ................................................................22
Cleaning of Burners ...............................................22
Blower Compartment .............................................23
Heat Exchanger and Burner Maintenance .............23
Lubrication .............................................................23
Vent System ...........................................................23
DESCRIPTION OF COMPONENTS ..........................23
TROUBLESHOOTING ...............................................24
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