2
Table of Contents
Furnace Specifications ................................................................................................................................. 3, 4
Safety Information ............................................................................................................................................. 4
Installation Requirements ................................................................................................................................. 6
Clearances to Combustible Materials .............................................................................................................. 5
Important Note - Commonwealth of Massachusetts ..................................................................................... 5, 6
Location ............................................................................................................................................................. 6
Horizontal Installations ..................................................................................................................................... 6
Conversion of the iQ Drive Upflow Furnace for a Horizontal Right Installation ......................................... 6
Conversion of the iQ Drive Upflow Furnace for a Horizontal Left Installation ........................................... 7
Circulating Air Supply ...................................................................................................................................... 8
Return Air .................................................................................................................................................. 8
Determining Nominal AC System Capacity ................................................................................................ 8
Selecting the AC Cooling Airflow ............................................................................................................... 9
Selecting the Heating Airflow .................................................................................................................... 9
Venting and Combustion Air Requirements ..................................................................................................... 9
Air Requirements for One-Pipe Installation .............................................................................................. 10
Installation in An Unconfined Space ........................................................................................................ 10
Installation in A Confined Space .............................................................................................................. 10
• Air From Inside ....................................................................................................................................... 10
• Air Directly Through An Exterior Wall ..................................................................................................... 11
• Outdoor Air Through Vertical Openings or Ducts ................................................................................... 11
• Outdoor Air Through Horizontal Openings or Ducts ............................................................................... 11
Venting Requirements ...................................................................................................................................... 11
Vent Pipe Material .................................................................................................................................... 15
Vent Pipe Length and Diameter ................................................................................................................ 15
Vent Pipe Installation ............................................................................................................................... 15
Pipe Routing & Support ............................................................................................................................ 15
Location of Outdoor Terminations ............................................................................................................ 18
Horizontal Venting .................................................................................................................................... 18
Vertical Venting ........................................................................................................................................ 19
Vent Freezing Protection .......................................................................................................................... 20
Concentric Vent Termination .................................................................................................................... 20
Drainage of Condensate From Furnace ........................................................................................................... 20
Gas Supply and Piping ..................................................................................................................................... 21
Leak Check .............................................................................................................................................. 2 2
Manifold Pressure Adjustment ................................................................................................................. 24
Conversion ............................................................................................................................................... 24
High Altitude Conversion ................................................................................................................................. 24
High Altitude Application .......................................................................................................................... 24
Pressure Switch Conversion for High Altitude Applications ..................................................................... 24
Natural Gas High Altitude Conversion ...................................................................................................... 24
LP/Propane Gas Sea Level and High Altitude Conversion ....................................................................... 25
Electrical Wiring .............................................................................................................................................. 25
Line Voltage Wiring .................................................................................................................................. 25
Low Voltage Wiring ................................................................................................................................... 26
Start-up and Adjustments ................................................................................................................................ 27
Start-Up Procedures ................................................................................................................................ 28
Verifying and Adjusting Firing Rate .......................................................................................................... 2 8
Selecting the Cooling Airflow .................................................................................................................... 29
Verifying and Adjusting Temperature Rise ............................................................................................... 29
Verifying Burner Operation ....................................................................................................................... 30
Verifying Operation of the Supply Air Limit Switch ................................................................................... 3 0
Wiring Diagram ......................................................................................................................................... 31
Description of Components .............................................................................................................................. 32
Maintenance ...................................................................................................................................................... 32
Combustion Air and Vent System ............................................................................................................ 32
Air Filter(s) ............................................................................................................................................... 32
Lubrication ............................................................................................................................................... 32
Location of Major Components ........................................................................................................................ 33
Condensate Drain Assembly .................................................................................................................... 34
Blower Compartment ................................................................................................................................ 34
Heat Exchanger and Burner Maintenance ................................................................................................ 34
System Operation Information ........................................................................................................................ 34
Sequence of Operation ............................................................................................................................ 34
Furnace Fails to Operate .......................................................................................................................... 35
Installation/Performance Checklist ................................................................................................................. 36
