Installation - Mechanical
50 CLCH-SVX07K-EN
Dual-Path SDU/Winterizer Assembly
A dual-path, split dehumidification unit (SDU)/winterizer
air handler consists of two units that are stacked together
in a draw-thru arrangement that share one supply fan. The
unit on the first level (primary unit) is designed to handle
the return air and is larger than the unit on the second level
(secondary unit), which is designed to handle outside air.
Factory-designed unit support brackets are provided with
all factory-approved, dual-path SDUs or winterizer air
handlers.
• A horizontal SDU/winterizer dual-path air handler
incorporates a horizontal supply fan on the first level
with a top opening in the primary unit that aligns with
a bottom opening in the secondary unit.
• A vertical SDU/winterizer dual-path air handler
incorporates a vertical supply fan on the second level
with a back opening that aligns with a front opening in
the secondary unit.
To assemble air handlers utilizing factory-approved and
factory-provided dissimilar unit sizes for horizontal SDU or
winterizer applications, join all similar size shipping
sections per “Section-to-Section Assembly,” p. 30.
Figure 63. Stacked unit assembly
(4) Screw:
10-16 x 0.750
self driller
(8) Tape:
0.12T x 1.00W
gray Butyl
(9) Guard:
perpendicular
to airflow flashing
Apply caulk
(14) Adhesive/sealant:
flex polyurethane
(15) Bracket:
hood support
(16) Angle:
hood support
(17) Screw:
0.250-14 x 0.750
self driller
Hood
See Detail A
Detail A
Assembled View
(17) Screw:
0.250-14 x 0.750
self driller
Detail A
WARNING
Heavy Objects!
Stacking units without factory-approval and without
factory-provided support brackets could result in the
base unit collapsing under the weight of the top unit
which could result in death or serious injury and
property damage. Do not stack air handlers unless
factory-designed and factory-approved. When stacking
units, factory-designed unit support brackets must be
used.
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