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EQUIPMENT IN CONFINED SPACE -
ALL AIR FROM OUTSIDE
OUTLET AIR
INLET AIR
NOTE-Each air duct opening shall have a free area of at least one
square inch per 2,000 Btu (645mm
2
per .59kW) per hour of the total
input rating of all equipment in the enclosure. If the equipment room
cate directly with the outdoors, each opening shall have a free area
of at least 1 square inch per 4,000 Btu (645mm
2
per 1.17kW) per
hour of the total input rating of all other equipment in the enclosure.
ROOF TERMINATED
EXHAUST PIPE
SIDE WALL
TERMINATED
EXHAUST PIPE
(ALTERNATE
LOCATION)
FURNACE
FIGURE 9
Shipping Bolt Removal
Units with 1/2 hp blower motor are equipped with three
flexible legs and one rigid leg. The rigid leg is equipped
with a shipping bolt and a flat white plastic washer (rather
than the rubber mounting grommet used with a flexible
mounting leg). See FIGURE 10.
The bolt and washer
must be removed before the furnace is placed into
operation
. After the bolt and washer have been removed,
the rigid leg will not touch the blower housing.
RIGID LEG
remove shipping bolt and washer
UNITS WITH 1/2 HP
BLOWER MOTOR
FIGURE 10
Installation - Setting Equipment
WARNING
Do not install the furnace on its front, back or in the
horizontal position. See FIGURE 12. Do not connect
the return air ducts to the back of the furnace. Doing so
will adversely affect the operation of the safety control
devices, which could result in personal injury or death.
Select a location that allows for the required clearances
that are listed on the unit nameplate. Also consider gas
supply connections, electrical supply, vent connection,
condensate trap and drain connections, and installation
and service clearances [24 inches (610 mm) at unit front].
The unit must be level from side to side. Unit may be
positioned from level to 1/2” toward the front to aid in
Allow for clearances to combustible materials as indicated
on the unit nameplate. Minimum clearances for closet or
alcove installations are shown in figure 13.
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.
SETTING EQUIPMENT
FRONT VIEW
SIDE VIEW
AIR FLOW
AIR FLOW
1/2”
max.
AIR FLOW
SIDE VIEW
Unit must be level side-to-side. Unit may be positioned
from level to 1/2” toward the front to aid in draining.
FIGURE 11
