UPFLOW APPLICATION
AIR FLOW
FRONT VIEW
UNIT
FRONT
AIR FLOW
SIDE VIEW
SETTING EQUIPMENT
UNIT MUST BE LEVEL SIDE−TO−SIDE IN ALL APPLICATIONS.
HORIZONTAL APPLICATION
AIR FLOW
FRONT VIEW
UNIT
FRONT
1/2" 
max.
END VIEW
1/2"
max.
UNIT SHOULD BE LEVEL FROM LEFT TO RIGHT BUT MAY BE
TILTED SLIGHTLY (MAX. 1/2") FROM BACK TO FRONT TO AID IN THE DRAINING OF THE HEAT EXCHANGER.
DOWNFLOW APPLICATION
AIR FLOW
FRONT VIEW
AIR FLOW
UNIT
FRONT
1/2"
max.
SIDE VIEW
FIGURE 7
The unit must be level from side to side. The unit may be
tilted slightly (maximum 1/2 in.) from back to front to aid
in the draining of the heat exchanger. See figure 7.
NOTE − Units with 1/2 hp blower motors are equipped with
three flexible legs and one rigid leg. The rigid leg is equipped with a shipping bolt and a flat white plastic wash- er (rather than the rubber mounting grommet used with a
flexible mounting leg). The bolt and washer must be re- moved before the furnace is placed into operation. Af-
ter the bolt and washer have been removed, the rigid leg will not touch the blower housing.
WARNING
Blower access panel must be securely in place when blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal injury or death.
Allow for clearances to combustible materials as indicated
on the unit nameplate. Minimum clearances for closet or al-
cove installations are shown in figures 8, 13 and 17.
WARNING
Improper installation of the furnace can result in per- sonal injury or death. Combustion and flue products must never be allowed to enter the return air system or air in the living space. Use sheet metal screws and joint tape to seal return air system to furnace.
In platform installations with furnace return, the fur- nace should be sealed airtight to the return air ple- num. A door must never be used as a portion of the return air duct system. The base must provide a stable support and an airtight seal to the furnace. Al- low absolutely no sagging, cracks, gaps, etc.
For no reason should return and supply air duct sys- tems ever be connected to or from other heating de- vices such as a fireplace or stove, etc. Fire, explo- sion, carbon monoxide poisoning, personal injury and/or property damage could result.
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