Page 2
Installer’s Information Manual
TABLE OF CONTENTS
SECTION 1.
Important Safety Rules ........................................................................................................................... 2
SECTION 2.
Meeting Codes ....................................................................................................................................... 3
SECTION 3.
Determining Best Furnace Location ....................................................................................................... 3
SECTION 4.
Conversion To Downflow Configuration ................................................................................................. 5
SECTION 5.
Allowing For Clearances......................................................................................................................... 6
SECTION 6.
Providing Combustion And Ventilation Air.............................................................................................. 8
SECTION 7.
Providing Proper Venting...................................................................................................................... 11
SECTION 8.
Sidewall Venting ................................................................................................................................... 15
SECTION 9.
Installing Gas Piping............................................................................................................................. 15
SECTION 10.
Installing Electrical Wiring .................................................................................................................... 16
SECTION 11.
Sequence Of Operation........................................................................................................................ 17
SECTION 12.
Installing Duct System .......................................................................................................................... 19
SECTION 13.
Selecting And Installing Filter Cabinets................................................................................................ 20
SECTION 14.
Checks Before Starting Furnace .......................................................................................................... 22
SECTION 15.
Gas Supply Pressure Adjustment ........................................................................................................ 22
SECTION 16.
Manifold Pressure Adjustment ............................................................................................................. 23
SECTION 17.
Checking Gas Input Rate ..................................................................................................................... 23
SECTION 18.
Derating For High Altitude .................................................................................................................... 25
SECTION 19.
Determining Correct Orifice Size.......................................................................................................... 25
SECTION 20.
Changing Main Burner Orifices ............................................................................................................ 26
SECTION 21.
Adjusting Blower Speed ....................................................................................................................... 26
SECTION 22.
Measuring Duct System Static Pressure.............................................................................................. 28
SECTION 23.
Measuring Air Temperature Rise ......................................................................................................... 28
SECTION 24.
Checking Controls ................................................................................................................................ 29
SECTION 25.
Setting Blower Timings......................................................................................................................... 30
SECTION 26.
Maintaining Furnace In Good Working Order ...................................................................................... 30
SECTION 27.
Blower Assembly Removal................................................................................................................... 31
SECTION 28.
Accessories .......................................................................................................................................... 31
SECTION 29.
Other Information And Publications...................................................................................................... 32
Figure 1. Upflow Configuration.
You may install this furnace in the upflow configuration in
one of the three positions shown in Figure 1. This furnace
is usually shipped from the factory in the upflow
configuration.
Figure 2. Downflow Configuration.
You may install this furnace in the downflow configuration in
one of the three positions shown in Figure 2. Conversion
from upflow to downflow can be done quickly and easily by
following the instructions in Section 4, "Conversion to
Downflow Configuration."
SECTION 1. IMPORTANT SAFETY
RULES
To alert you to potential hazards, we use the signal words
"WARNING" and "CAUTION" throughout this manual.
"WARNING" alerts you to situations that could cause or
result in serious injury or death. "CAUTION" alerts you to
situations that could cause or result in minor or moderate
injury or property damage. For a safe and reliable
installation be sure to read and follow all warnings and
cautions.
