CACH/CAHH/CAHJ & CACH/CAHH/CAHK
Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008108, Rev. G [07/08/10]
11
Mounting the Unit
(continued)
Mounting method
In existing construction, remove enough
•
ceiling panels to provide clearance space
for mounting unit to ceiling joists.
Before beginning the installation, inspect
•
the unit location, test the strength of the
ceiling joists to insure they will support
the weight of the unit.
Determine mounting method:
•
On wooden beams use threaded rods,
–
washers, and nuts to suspend support
brackets.
With metal structures, secure thread-
–
ed rods on an existing angle or install
a new support angle.
On newly built concrete slabs secure
–
threaded rods with inserts and em-
bedded bolts.
For previously built concrete slabs
–
install hanging bolts with an expan-
sion anchor.
Follow local building codes for required
•
safety cables, braces, etc.
Ceiling opening
NOTICE
Make sure the ceiling grid is supported
separately from the Cassett e. Th
e ceiling
must not be supported by any part of the
Cassett e unit, fascia or any associated
wiring or pipe work.
Cut an opening in the false ceiling with the
size shown in ( Table 2, Page 11 ).
Ceiling opening sizes
Table 2
Model
Dimensions
9 & 12
23¼” x 23¼” (591 x 591 mm)
24
33/” x 33/” (860 x 860 mm)
36
46” x 33/” (1168 x 860 mm)
Ceiling cutout/rod placement
Figure 6
template (shipped with unit)
(51MM X 45°)
2.000 X 45° TYP
Rod
Positions
1.500 TYP
Rod
Positions
(38MM TYP)
Ceiling rod positions
Table 3
Model
Dimension A
Dimension B
9 & 12
19.50” (495mm)
22.87” (581mm)
24
29.19” (740mm)
30.80” (782mm)
36
29.19” (740mm) 43.06” (1094mm)
Mounting brackets
Figure 7
Fold
bracket along
perforations