3
FIGURES & TABLES ................................................. 28
Figure 20 - Furnace Dimensions ...................... 28
Airfl
ow
Data
............................................................ 29
Table 5 - Heating / Cooling Airfl ows and
Temperature Rises - Fixed Speed ...... 30
Table 6 - Nominal CFM & Temperature Rises -
Variable
Speed
.................................... 31
Table 7 - Nominal Cooling / Heat Pump CFM -
Variable
Speed.................................... 32
Electrical
Information
...........................................33
Figure 21 - Two-Stage Fixed Speed Motor
Control
Board
..................................33
Figure 22 - Two-Stage Variable Speed
Motor Control Board ........................33
Figure 23 - Two-Stage Furnace Control Board ..33
Figure 24 - Wiring Diagram - Two Stage Fixed
Speed Upfl ow/Horiz. Furnaces ........34
Figure 25 - Wiring Diagram - Two Stage Fixed
Speed Downfl ow Furnaces .............35
Figure 26 - Wiring Diagram - Two Stage Variable
Speed Upfl ow/Horiz. Furnaces .......36
Figure 27 - Wiring Diagram - Two Stage Variable
Speed Downfl ow Furnaces .............37
Gas Information ...................................................38
Table 8 - Gas Flow Rates ..................................38
Table 9 - Gas Pipe Capacities ...........................38
Table 10 - High Altitude Deration Chart for
Propane
Gas
....................................39
Table 11 - Natural Gas Heating Values .............39
Table 12 - High Altitude Deration Chart for
Nat. Gas - High Heating Value .........40
Table 13 - High Altitude Deration Chart for
Nat. Gas - Low Heating Value ..........40
Location of Furnace Components ........................41
Figure 28 - Upfl ow / Horizontal Gas Furnace
Components
...................................42
INSTALLATION / PERFORMANCE CHECKLIST .....44
IMPORTANT SAFETY INFORMATION
Please read all instructions before servicing this equipment.
Pay attention to all safety warnings and any other special
notes highlighted in the manual. Safety markings are
used frequently throughout this manual to designate a
degree or level of seriousness and should not be ignored.
WARNING
indicates a potentially hazardous situation that
if not avoided, could result in personal injury or death.
CAUTION
indicates a potentially hazardous situation that
if not avoided, may result in minor or moderate injury or
property damage.
REQUIREMENTS & CODES
WARNING:
The information listed below must be followed
during the installation, service, and operation
of this furnace. Failure to follow safety
recommendations could result in possible
damage to the equipment, serious personal
injury or death.
• This furnace must be installed in accordance with
these instructions, all applicable local building codes
and the current revision of the National Fuel Gas Code
(NFPA54/ANSI Z223.1) or the Natural Gas and Propane
Installation Code, CAN/CGA B149.1.
• Use only with type of gas approved for this furnace.
Refer to the furnace rating plate.
• Install this furnace only in a location and position as
specifi ed on page 5.
• Provide adequate combustion and ventilation air to the
furnace space as specifi ed on pages 6 - 10.
• Combustion products must be discharged outdoors.
Connect this furnace to an approved vent system only,
as specifi ed on pages 9 - 10.
• Never test for gas leaks with an open fl ame. Use a
commercially available soap solution to check all
connections. See pages 15 - 16.
• This furnace is designed to operate with a maximum
external pressure rise of 0.5 inches of water column.
Consult Tables 5 - 7 (pages 30 - 32), and the rating
plate for the proper circulating air fl ow and temperature
rise. It is important that the duct system be designed to
handle the desired fl ow rate and temperature rise. An
improperly designed duct system can result in nuisance
shutdowns, and comfort or noise issues.
• When supply ducts carry air circulated by the furnace
to areas outside the space containing the furnace, the
return air shall also be handled by duct(s) sealed to
the furnace casing and terminating outside the space
containing the furnace. See pages 11 - 12.
• This furnace may be used for temporary heating of
buildings or structures under construction. See the
guidelines listed on pages 4 - 5.
• A gas-fi red furnace for installation in a residential garage
must be installed as specifi ed on page 5.
• This furnace is not approved for installation in mobile
homes. Installing this furnace in a mobile home could
cause fi re, property damage, and/or personal injury.
