Furnace Specifications ................................................................................................................. 4-5
Upflow/Horizontal Models ....................................................................................................... 4
Downflow Models .................................................................................................................... 5
Safety Information ............................................................................................................................. 8
Installation Requirements ............................................................................................................ 6-8
General ................................................................................................................................. 12
Air From Inside ............................................................................................................. 14
Venting Requirements .................................................................................................................... 15
General ................................................................................................................................. 15
Horizontal Power Venting .................................................................................................... 19
Horizontal Installation .................................................................................................. 20
Flexible Vent Systems .......................................................................................................... 21
Circulating Air Supply .................................................................................................................... 21
General ................................................................................................................................. 21
Return Air .............................................................................................................................. 21
Gas Supply and Piping .................................................................................................................. 23
General ................................................................................................................................. 23
Leak Check ........................................................................................................................... 23
High-Altitude Application ...................................................................................................... 24
Conversion ............................................................................................................................ 25
Electrical Wiring ............................................................................................................................. 26
General ................................................................................................................................. 26
Line Voltage Wiring .............................................................................................................. 27
Low Voltage Wiring ............................................................................................................... 28
Start-up & Adjustments .................................................................................................................. 29
General ................................................................................................................................. 29
Start-Up Procedures ............................................................................................................. 29
Wiring Diagram ................................................................................................................................ 34
Description of Components ........................................................................................................... 34
Maintenance ..................................................................................................................................... 35
Vent System .......................................................................................................................... 36
Air Filter(s) .............................................................................................................................. 36
Lubrication ............................................................................................................................ 37
Blower Compartment ............................................................................................................ 37
Cleaning of Flue Passages ................................................................................................. 37
Cleaning of Burners ............................................................................................................. 38
General ................................................................................................................................. 38
Sequence of Operation ....................................................................................................... 38
Heating Mode ............................................................................................................... 38
Cooling Mode ............................................................................................................... 38
Fan Mode ..................................................................................................................... 39
Furnace Fails to Operate ..................................................................................................... 39
Table of Contents