Indoor Return Air Grille and Ductwork
Installation
AVLWP01A-R & AVLWP01A-L Return Air Grille with
Access Panel filter
hinged access door. The door can
be installed with the grille oriented at the top of the panel
for improved sound attenuation (Recommended for
AVH09 & AVH12)
Option 1
Field Supplied Return Air Grille
panel must have a minimum 250 square inches of free area.
Option 2
NOTE: All VTAC chassis are shipped with a
(20" x 14" for AVH09, AVH12, & AVH18. 20" x
18" for AVH24)
Ductwork
The supply duct system should be designed using a
recognized method such as the equal fraction or velocity
reduction method, using the appropriate duct calculator(s)
for the type(s) of duct being used in the system. The duct
system should be designed for a maximum friction rate
registers and/or diffusers.
NOTE: Do not operate the unit without a supply duct
attached. The return air to the VTAC unit MUST NOT
be ducted and all units must have a free return air
Chassis Installation
CAUTION
EXCESSIVE WEIGHT HAZARD
USE TWO OR MORE PEOPLE WHEN
INSTALLING YOUR AIR CONDITIONER.
FAILURE TO DO SO CAN RESULT IN BACK OR
OTHER INJURY.
CAUTION
CUT / SEVER HAZARD
SOME EDGES MAY BE SHARP, USE GLOVES
OR OTHER HAND PROTECTION WHEN
HANDLING UNIT.
FAILURE TO DO SO CAN RESULT IN MINOR TO
MODERATE PERSONAL INJURY.
1. Ensure that the wall adapter and louver are installed
in accordance with the instructions listed on pages
5-7.
2. Place the chassis into the closet with the outdoor
side facing the wall adapter opening.
3. Slide the chassis into the wall adapter until the
adapter divider seal is established.
NOTE: The VTAC chassis must be inserted into the
wall adapter so that the adapter divider gasket makes
adapter.
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