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Clean the all-aluminum coil by spraying the coil steadily
coil face. Take care not to fracture the braze between the
-
tiously to prevent damage.
E-Supply Blower Wheel
Annually inspect supply air blower wheel for accumulated
access panel or to clean blower wheel.
VII-ACCESSORIES
The accessories section describes the application of most
A-Mounting Frames
When installing units on a combustible surface for down-
frame is used. The roof mounting frames are recommend-
ed in all other applications but not required. If the ZCC
be supported under all edges and under the middle of the
unit to prevent sagging. The units MUST be mounted level
-
tion.
-
-
structions for details of proper assembly and mounting.
The roof mounting frame MUST be squared to the roof
and level before mounting. Plenum system MUST be in-
stalled before the unit is set on the mounting frame. Typ-
-
fer to the roof mounting frame installation instructions for
proper plenum construction and attachment.
B-Transitions
with transition for detailed installation procedures.
ASSEMBLED ROOF MOUNTING FRAME
SUPPLY AIR
OPENING
RETURN AIR
OPENING
FIGURE 16
ROOF
MOUNTING FRAME
(Extends around entire
perimeter of unit)
FIBERGLASS
INSULATION
(Furnished)
COUNTER FLASHING
(Field Supplied)
UNIT BASE
BOTTOM
RIGID INSULATION
(Field Supplied)
ROOFING
MATERIAL
CANT STRIP
(Field Supplied)
NAILER STRIP
(Furnished)
UNIT BASE
RAIL
FIGURE 17
D-Economizer (Field or Factory Installed)
NOTE - The following is an example of one economizer
used. See Engineering Handbook for other economizers
used and refer to the applicable economizer installation
instruction for more detail.
Economizers use outdoor air for free cooling when tem-
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