Daikin Vision CAH 003-090 C Installation And Maintenance Manual page 14

Injected-Foam Insulated Panels
Vision air handlers are furnished with double-wall, injected-
foam insulated panels . Foam panels are stronger, more rigid,
and lighter than panels with fiberglass insulation. The insulation
R-value is improved to 13. However, foam insulation can burn
when exposed to flame or other ignition sources and release
toxic fumes. Take care in cutting and sealing all field-cut
openings in these panels .
Panel Cutting Procedure
Flame and smoke can cause equipment
damage, severe personal injury, or
death .
Before operating unit, seal all piping and
wiring holes on both inner and outer panels
with an industrial grade silicone sealant or
duct seal compound . Do not use a cutting
torch or expose panel to fire. Panel
damage can occur .
1 . Determine the number and location of holes required for
electrical conduit, piping, and control wiring as follows
(also refer to Figure 25):
a . Check that adequate space is available inside the
unit for conduit or pipe routing .
b . Do not locate holes in a panel that provides access
to key maintenance components such as filters
and fan assemblies .
c . Do not locate where the conduit or piping blocks
airflow or obstructs hinged access doors.
2 . Once a proper location is determined, drill a small pilot
hole completely through the panel . Then use a sharp
hole saw or a saber saw and cut from each side of the
panel .
3 . Seal the double-wall panel on each side with an
industrial/ commercial grade silicone sealant or duct
seal compound . It is extremely important to seal each
panel hole or penetration securely so that it is airtight,
watertight, and that there is no exposed foam insulation.
Figure 25: Cutting/Sealing Injected-Foam Insulated panels
Cut hole from both sides of panel
Prop 65—Substances in fuel or from fuel combustion can cause personal injury or death,
and are known to the State of California to cause cancer, birth defects or other reproductive harm.
IM 672-11 • VISION AIR HANDLING UNIT
WARNING
Seal completely with silicone
sealant or duct seal compound
Field Mounting Junction Boxes and
Other Components
For field mounting 4" × 4" or smaller junction boxes to the
standard panel exterior, use a minimum quantity of four, 3/16"
diameter pop rivets. DO NOT use self-tapping drill screws.
They will not tighten nor secure properly and panel damage
can occur .
If larger, heavier components require mounting on unit panels,
use through-bolts with flat washers through both outer and
inner panels. To maintain panel integrity, seal both ends with
an industrial/commercial grade silicone sealant or duct seal
compound .
The unit frame channel is another excellent location for
securing heavier components; self-tapping screws are not
acceptable . Ensure that the location permits the full operation
of all access doors and panels and does not interfere with
other vital components .
Face and Bypass Section Mounting
Internal face and bypass, and external face and bypass for
sizes 003 to 035 are mounted together using the instructions
for horizontal components and do not require additional
instruction .
For all size units that bypass directly into a vertical fan section
and for sizes 040 to 090 with external face and bypass, use the
following instructions.
Figure 26: Assembly of Fan Coil Sections
Joining
collar
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