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Figure 33. Wiring Diagram for Two-Stage, Fixed
Speed Downflow Furnaces ................. 41
Figure 34. Wiring Diagram for Two-Stage, Variable
Speed Upflow Furnaces ...................... 42
Figure 35. Wiring Diagram for Two-Stage, Variable
Speed Downflow Furnaces ................. 43
Venting Information ..................................................44
Table 15. Vent Termination Clearances ................ 44
Figure 36. Horizontal & Vertical Venting ................ 45
Figure 37. Upflow Options .................................... 46
Figure 38. Horizontal Options .............................. 47
Figure 39. Downflow Options ............................... 48
TROUBLESHOOTING .............................................. 49
FURNACE COMPONENTS....................................... 49
Table 16. Furnace Control Board Fault
Conditions ............................................. 49
Table 17. Motor Control Board Fault Conditions .. 49
Figure 40. Component Locations ......................... 50
IMPORTANT SAFETY INFORMATION
INSTALLER: 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.
WARNING:
The safety information listed in this manual
must be followed during the installation,
service, and operation of this unit. Unqualified
individuals should not attempt to interpret these
instructions or install this equipment. Failure
to follow safety recommendations could result
in possible damage to the equipment, serious
personal injury or death.
WARNING:
Unless otherwise noted in these instructions,
only factory authorized kits or accessories may
be used with or when modifying this product.
WARNING:
Improper installation, service, adjustment,
or maintenance may cause explosion, fire,
electrical shock or other hazardous conditions
which may result in personal injury or property
damage. Unless otherwise noted in these
instructions, only factory authorized kits or
accessories may be used with this product.
WARNING:
Do not install this furnace if any part has been
submerged under water. A flood damaged
furnace is extremely dangerous. Attempts to
use the furnace may result in fire or explosion. A
qualified service agency should be contacted to
inspect the furnace and to replace any electrical
or control system parts that have been wet or
under water.
• To minimize equipment failure or personal injury, it is
essential that only qualified individuals install, service, or
maintain this equipment. If you do not posses mechanical
skills or tools, call your local dealer for assistance.
• Follow all precautions in the literature, on tags, and
on labels provided with the equipment. Read and
thoroughly understand the instructions provided with
the equipment prior to performing the installation and
operational checkout of the equipment.
• Use caution when handling this appliance or removing
components. Personal injury can occur from sharp metal
edges present in all sheet metal constructed equipment.
• Do not store any of the following on, or in contact with,
the unit: Rags, brooms, vacuum cleaners, or other
cleaning tools, spray or aerosol cans, soap powders,
bleaches, waxes, cleaning compounds, plastics or
plastic containers, paper bags or other paper products,
gasoline, kerosene, cigarette lighter fluid, dry cleaning
fluids, paint thinners, or other volatile fluids.
•
The installer should become familiar with the units wiring
diagram before making any electrical connections to
the unit. See
Figure 32 (page
41),
Figure 34 (page
or the unit wiring label.
• Always reinstall the doors on the indoor blower after
servicing or cleaning/changing the filters. Do not operate
the indoor blower without all doors and covers in place.
40),
Figure 33 (page
42), &
Figure 35 (page 43)
3
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