Duct Connections - Daikin Skyline OAH003GDAC Installation And Maintenance Manual

Duct Connections

Use flexible connectors on the outlet and inlet duct connections
of all units. Do not position down flow fans over air ducts that
are routed down into the building. Use a discharge plenum
when bottom connections are necessary
Support all ductwork independently of the unit or unit casing.
Figure 35: Discharge Plenum
If the unit has a section with a top opening, field fabricate and
install flashing to seal out and divert any moisture away from
the opening, ductwork, or duct components attaching to the
opening. Install flashing so that it laps over the standing seams
of the unit roof panels and over the side edges of the unit
(Figure 34). Connect ductwork to the unit itself - do not connect
ductwork directly to the unit roof panel only. Seal the ductwork
to the opening, the unit itself, and to the unit roof panel to
prevent moisture intrusion into the unit or building.
NOTE: In certain cases, a full roof panel will be included
above top openings or top dampers. Field cut an
opening of the desired size taking care to avoid
damaging unit panels, flanges, dampers, or any other
internal components while cutting. Roof panel(s) may
be removed to facilitate cutting, sealing, and flashing
connections but must be replaced and resealed in a
way that diverts moisture away from the opening and
connected ductwork. Ductwork must be sealed and
flashed to the opening, the unit itself, and to the unit
roof panel to prevent moisture intrusion into the unit
or building.
IM 777-18 • SKYLINE OUTDOOR AIR HANDLER
(Figure 34).
D i s c h a r g e
P l e n u m
16
Figure 36: Suggested Flashing over Top Panels and Sides
of Units
Duct
Unit
Duct
Unit
Duct
Field-Cut Opening
Unit
M I
eChanICal nsTallaTIon
Flashing
Standing Seam
Unit Roof Panel
Flashing
Flashing
Unit Roof Panel
Standing Seam
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