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WSHP-SVX014J-EN
Supply-Air Ductwork
Horizontal DXH and EXH units require duct flanges to be
field installed. The duct flange ships in a box on the side of
the unit. Install the flange with (8) 3/8 in. (213 mm) factory
supplied screws.
Install the 1 in. (25.4 mm) supply-air duct flange to the
vertical and horizontal equipment with the (8) 5/16 in. (7.94
mm) factory-supplied head screws. The duct collar
assembly for each unit is shipped with the unit in the same
box where the IOM manual is located.
When attaching the field ductwork to the unit, provide a
watertight flexible connector at the unit to prevent operating
sounds from transmitting through the ductwork (See the
figure below).
Elbows with turning vanes or splitters are recommended to
minimize air noise due to turbulence and to reduce static
pressure.
Figure 16. Flexible supply-air connector (field
provided)
1-inch Duct Collar
(Factory Provided)
Supply-Air
Boot (Field Supplied)
Return-Air Ductwork
Install the 1/2 in. (25.4 mm/50.8 mm) adjustable filter rack
to the horizontal equipment only with the use of (4) 5/16 in.
(7.94 mm) factory supplied head screws. The vertical
equipment factory ships with the filter rack and filter(s)
installed.
When attaching the field ductwork to the unit, provide a
water-tight flexible connector at the unit to prevent
operating sounds from transmitting through the ductwork.
Elbows with turning vanes or splitters are recommended to
minimize air noise due to turbulence and to reduce static
pressure.
Figure 17. Flexible return-air connector (field
provided)
SUPPLY-AIR
RETURN
AIR
Filter Flange
(Factory Provided)
Return-Air Boot
(Field Provided)
Ducted Panel
The return-air arrangement may be easily converted from a
free return-air system, to a ducted return-air system with
the addition of a return-air side panel. By replacing the filter
racks with the return-air panel, a complete seal from the
duct to the unit is possible. The 1.5 duct flange facilitates
ease of field connection to the duct system. This accessory
is typically used when the return-air filter is placed in a built-
in ceiling grille, or placed within a field provided filter rack
assembly.
Install the return-air duct panel to the return-air opening
with the six screws provided for the filter rack assembly.
Installation
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