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Vertical-Horizontal Air Handling Units can be installed in a choice of vertical upow, vertical downow (with optional downow kit), or horizontal (left
or right side) congurations.
Vertical (Upflow) Installation
• Unit must be positioned properly for plenum / duct installation.
• To maintain proper air flow, minimum height clearance is 14 inches.
• Plenum must be strong and secure enough to support the installation of adapter collars to accommo-
date duct work.
• Air handler platform must be sturdy enough to support the frame, plus any accessories (e.g., filter box).
• To prevent air leaks, seal all duct work according to local codes, but make sure that filter access is still
unobstructed.
• Vibration isolators (field supplied) must be installed between the unit frame and the platform. If neces-
sary, provide the installing contractor with an illustration of where the vibration isolator must be added
and how it must be positioned.
Do not install the screws on the front and back of the unit; doing so will block lter installation.
Use > 6 Screws (M4*25L)
Field Supplied
Return Air Duct /
Plenum
>1 inch
Field Supplied
Supply Air Duct
Figure 254:Vertical Installation /
Attaching the Bottom Duct.
FOUR-WAY VAHU INDOOR UNITS
Installation and Best Layout Practices
Vertical (Downflow) Installation
The Vertical-Horizontal Air Handling Unit can be field-converted to vertical downflow operation. The
optional vertical downflow kit is required. Downflow kit PNDFJ0 is required for 18-36MBH NJ chassis
units. The coil must be removed and repositioned in the chassis with the brackets of the downflow kit.
For installation details, refer to the instructions included with the kit.
Figure 255: Chassis after Downow
Field Conversion.
Refrigerant
connections
Drain
connections
for downflow
application
Air filter cover
VERTICAL-HORIZONTAL | 197
Vertical-Horizontal Air Handling Unit
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
MULTI
F
MAX
MULTI
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