LOCATION
PROCEDURE 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 11.
•
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, the return
air shall also be handled by duct(s) sealed to furnace casing and terminating outside the space containing the furnace to ensure there will not be
a negative pressure condition within equipment room or space.
WARNING: 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. Safety control operation will be adversely affected. Never connect return-air ducts to back of furnace.
(See Fig. 15.)
Fig. 14—Furnace Location for Proper Condensate
Drainage
A02146
UPFLOW OR DOWNFLOW
HORIZONTAL
FRONT
LEVEL (0
″
)
TO
1
⁄
2
″
MAX
MIN
1
⁄
4
″
TO
1
⁄
2
″
MAX
FRONT
Fig. 15—Prohibit Installation on Back
A93043
FRONT
BACK
FRONT
B
A
C
K
—17—