Setting Equipment - Allied Air A96US2V Installation Instructions Manual

When ducts are used, they shall be of the same cross-
sectional area as the free area of the openings to which they
connect. The minimum dimension of rectangular air ducts
shall be no less than 3 inches (75 mm). In calculating free
area, the blocking effect of louvers, grilles, or screens must
be considered. If the design and free area of protective
covering is not known for calculating the size opening
required, it may be assumed that wood louvers will have 20
to 25 percent free area and metal louvers and grilles will
have 60 to 75 percent free area. Louvers and grilles must be
fixed in the open position or interlocked with the equipment
so that they are opened automatically during equipment
operation.
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.
Figure 10
507404-04
Units with 1/2 HP
Blower Motor

Setting Equipment

Unit must be level side-to-side in all applications.
Tilt the unit slightly (Max. 1/2") from back to front to aid in the draining of
the heat exchanger.
Figure 11
Issue 1621
INSTALLATION
Setting Equipment
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.
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.
Upflow Applications
The gas furnaces can be installed as shipped in the upflow
position. Refer to Figure 12 for clearances. 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. Tilt the unit slightly (maximum 1/2 in. from
level) from back to front to aid in the draining of the heat
exchanger. See Figure 11.
Allow for clearances to combustible materials as indicated
on the unit nameplate.
WARNING
WARNING
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