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Table of Contents
Furnace Specifi cations ............................................................................................................4-5
Furnace Airfl ow Data .......................................................................................................... 6-7
Safety Information ....................................................................................................................... 8
Installation Requirements ........................................................................................................... 8
Requirements and Codes ...................................................................................................... 8
Location ................................................................................................................................. 8
Downfl ow Warning ................................................................................................................. 9
Horizontal Installations ........................................................................................................ 10
Supply Air Plenum Installation .................................................................................................11
Installation on a Concrete Slab ........................................................................................... 11
Installation on a Combustible Floor ..................................................................................... 11
Circulating Air Supply ............................................................................................................... 11
Return Air ............................................................................................................................ 13
Venting and Combustion Air Requirements ........................................................................... 13
Combustion Air Quality ........................................................................................................ 15
Air Requirements for One-Pipe Installation ......................................................................... 15
Installation in An Unconfi ned Space .................................................................................... 15
Installation in A Confi ned Space ......................................................................................... 15
• Air From Inside .................................................................................................................. 16
• Air Directly Through An Exterior Wall ................................................................................ 16
• Outdoor Air Through Vertical Openings or Ducts .............................................................. 17
• Outdoor Air Through Horizontal Openings or Ducts .......................................................... 17
Venting Requirements ............................................................................................................... 17
Vent Pipe Material ............................................................................................................... 18
Vent Pipe Length and Diameter ........................................................................................... 18
Vent Pipe Installation ........................................................................................................... 19
Pipe Routing & Support ....................................................................................................... 19
Location of Outdoor Terminations ........................................................................................ 20
• Horizontal Venting ............................................................................................................ 20
• Vertical Venting .................................................................................................................. 25
• Vent Freezing Protection ................................................................................................... 26
• Concentric and Side Wall Vent Termination ....................................................................... 27
Drainage of Condensate From Furnace ................................................................................. 27
Gas Supply and Piping ........................................................................................................ 27
Leak Check ......................................................................................................................... 27
Conversion .......................................................................................................................... 27
High Altitude Application ..................................................................................................... 29
Natural Gas High Altitude Conversion ................................................................................. 29
LP/Propane Gas Sea Level and High Altitude Conversion .................................................. 29
Electrical Wiring ......................................................................................................................... 31
Line Voltage Wiring .............................................................................................................. 31
Low Voltage Wiring .............................................................................................................. 31
Start-up and Adjustments.................................................................................................... 32-34
Start-Up Procedure .............................................................................................................32
Verifying and Adjusting Firing Rate ..................................................................................... 33
Verifying and Adjusting Temperature Rise ........................................................................... 34
Verifying Burner Operation .................................................................................................. 34
Verifying Operation of the Supply Air Limit Switch .............................................................. 34
Description of Components ..................................................................................................... 35
Maintenance ............................................................................................................................... 35
Combustion Air and Vent System ........................................................................................ 35
Air Filter(s) ........................................................................................................................... 35
Lubrication ........................................................................................................................... 35
Condensate Drain Assembly ............................................................................................... 35
Blower Compartment ........................................................................................................... 35
Heat Exchanger and Burner Maintenance .......................................................................... 34
Location of Major Components ........................................................................................... 37
System Operation Information ................................................................................................. 38
Sequence of Operation ....................................................................................................... 38
Furnace Fails to Operate ..................................................................................................... 39
Twinning of Two Furnaces ................................................................................................... 39
Installation/Performance Checklist .......................................................................................... 40