UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent unit
operation.
The condensate trap MUST be installed below furnace. See
Fig. 5 for dimensions. The drain connection to condensate
trap must also be properly sloped to an open drain.
NOTE:
Combustion-air pipe (when applicable) and vent pipe(s)
are restricted to a minimum length of 5 ft. (See Table 12.)
NOTE:
A 12-in. minimum offset pipe section is recommended
with short (5 to 8 ft) vent systems. This recommendation is to
reduce excessive condensate droplets from exiting the vent pipe.
(See Fig. 11, 12 or 43.)
LOCATION
Step 1—General
This furnace must
•
be installed so the electrical components are protected from
water.
•
not be installed directly on any combustible material other than
wood flooring (refer to SAFETY CONSIDERATIONS).
•
be located so combustion-air and vent pipe maximum lengths
are not exceeded. Refer to Table 12.
•
be located where available electric power and gas supplies meet
specifications on the furnace rating plate.
•
be attached to an air distribution system and be located as close
to the center of the distribution system as possible. Refer to Air
Ducts section.
•
be provided with ample space for servicing and cleaning.
Always comply with minimum fire protection clearances
shown on the furnace clearance to combustibles label.
NOTE:
For upflow/downflow applications install furnace so that
it is level or pitched forward within 1/2-in. for proper furnace
operation. For horizontal applications pitch 1/4-in. minimum to
1/2-in. maximum forward to ensure proper condensate drainage
from secondary heat exchangers. (See Fig. 14.)
When a furnace is installed so that supply ducts carry air circulated
by the furnace to areas outside the space containing the furnace,
return air must also be handled by ducts sealed to furnace casing.
The ducts terminate outside the space containing the furnace to
ensure a negative pressure condition will not occur within equip-
ment room or space.
FIRE, INJURY OR DEATH HAZARD
Failure to follow this warning could result in fire, property
damage, personal injury, or death.
Do not install furnace on its back. (See Fig. 15.) Safety
control operation will be adversely affected. Never connect
return-air ducts to back of furnace.
Fig. 13—Horizontal Right Tube Configuration
A01028
PLUG
COLLECTOR BOX DRAIN TUBE
(BLUE AND WHITE STRIPED)
INDUCER HOUSING
DRAIN TUBE (VIOLET)
COLLECTOR BOX
EXTENSION TUBE
COLLECTOR BOX TUBE (GREEN)
CAP
COLLECTOR BOX DRAIN TUBE (BLUE)
COLLECTOR BOX TUBE (PINK)
CONDENSATE
TRAP
COLLECTOR BOX EXTENSION TUBE
AUXILARY “J” BOX RELOCATED HERE
14
