Daikin Vision Installation And Maintenance Manual page 11

Field Mounting Junction Boxes and
Other Components
CAUTION
Do not use self-tapping drill screws. They will not tighten nor
secure properly and panel damage can occur.
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.
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.
For field mounting junction boxes with conduit, always seal
conduit with electrical conduit sealant.
The unit frame channel is another excellent location for
securing heavier components. Self-tapping screws are not
acceptable; use through-bolts with flat washers and seal.
Check that the location permits the full operation of all access
doors and panels and does not interfere with other vital
components.
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External Face and Bypass Duct
Assembly
When extended size units are ordered with external face
and bypass, the bypass duct ships separately and must be
attached to the unit in the field. The joining of the bypass duct
assembly to the unit must be done after the unit is assembled.
The field assembly of the bypass duct to the unit requires the
following steps (also refer to
1. Position the unit shipping sections together and
assemble in the equipment room.
2. After the unit is assembled, lift the duct into position over
the unit. Joining collars are shipped factory assembled
to the unit and duct. There is a joining collar located in
the top of the bypass opening and in the leaving air side
of the bypass duct. These joining collars are used to
provide air seals. Line up the duct with the top openings
in the unit.
3. Place the duct assembly that has the joining collar on
the bottom, onto the top of the unit. Once it is in place,
position the other duct assembly. Use caution and fit the
splice collar into the first duct assembly, and then lower
the other end into the bypass opening.
4. Once the duct is positioned correctly, fasten the duct
pieces together with the joining collar provided. To do
this, remove the fasteners located in the corners of the
duct assemblies, place the collar over the holes in the
corners, and then replace the fasteners. See
page 8.
Figure 14: Assembly of Bypass Duct to Unit
J o i n i n g C o l l a r
11
Installation Guidelines
Figure 14):
J o i n i n g C o l l a r
IM 915-13 • VISION - EXTENDED SIZES
Figure 6 on
J o i n i n g C o l l a r