Tip: At this time, it may be easiest to cut any necessary holes or
service knockouts that may be required in the plenum and
install any plenum takeoffs or supply grilles before
proceeding.
3
Apply 3/8” foam tape to the bottom edges of the top plenum and
front access cover to create a positive air seal between the
plenum and the unit. (If your unit does not have a rear plenum
extension apply the foam tape to the back corners of the plenum
where it will meet the wall.)
4. Place the back/side portion of the plenum assembly on top of the
unit and against the wall or rear plenum extensions. If applicable,
fasten the back corners of the plenum to the standoff extensions
using ¾” x #10 screws. (It will be necessary to push back the
insulation to access the bare metal to start the screws.)
5. Fasten the bottom edges of the plenum to the top of the unit
using ½” x #10 screws.
6. Complete and test all service connections (electrical, plumbing,
refrigeration, etc.) required for the unit operation.
7. Reinstall the front/ top access cover of five-sided plenum
assembly.
8. If your plenum is supplied with supply grilles, it may be necessary
to adjust the supply grilles. If the grilles are double deflective
(standard) the rear blades of each grille should be positioned
parallel to the floor or slightly downwards. The front blades
should be positioned to provide a broad spectrum of air
dispersion throughout the room. (Left, right and center)
Refer to custom shop and installation drawings instructions in
the Information Package that was sent with the unit for exact
measurements, descriptions and installation details.
Rear Plenum Assembly (RPA)
We recommend the use of ¾” x #10 round head self-tapping sheet
metal screws to fasten this accessory to the unit ventilator.
The rear plenum assembly is pre-assembled to minimize field
installation procedures. These have been shipped separate of the
units to facilitate shipping and on site handling of the units due to
their weight and size. Match up the RPA to the corresponding unit
before proceeding.
Notice: You may require an assistant's help for this procedure.
1. It is necessary to remove and reassemble the back from the RPA
in order to fasten it to the back of the unit. Remove the back
panel of the RPA.
2. Field cut openings must be made in the back panel of each rear
plenum assembly (RPA). These holes must directly line up with
the wall sleeve openings and must be sized so as not to restrict
airflow and still maintain a seal between the unit and the wall.
Installation Note: When a partition (or partitions) is designed
into the RPA and wall sleeve, a separation of air between two or
more air paths must be maintained from the back of the unit to
the backside of the exterior louver. (refer to job specific shop or
installation drawings)
3. To assure a tight seal between the classroom unit and the RPA,
apply 3/8” foam tape to the 1” wide front edges of the RPA and
any partitions it may have.
Tip: Keep the tape back from the outside edges by at least ¼” so
the tape does not become unsightly when compressed.
4.
Position the Vertical Classroom Unit directly in front of its final
installation position. Allow enough room behind the unit for the
RPA and some room to work. (Once the RPA is mounted it may
become more difficult to relocate the unit.)
5. Place the RPA tight against the back of the unit so that it is flush
with the sides and top of the unit, as shown in the installation
drawings.
6. Begin by fastening the RPA to the back of the unit at one of the
top corners. Place a screw through the 1” front mounting flange
of the RPA side panel into the back of the unit. Proceed by
similarly placing a screw into the opposite top corner and then
down both of the RPA side flanges at approximately 18” apart.
(Do not mount the RPA to the unit through the top or bottom
cover of the RPA as these may interfere with the removal of
components during future service maintenance.)
7. Reinstall the back panel and apply 1”' low density foam tape
(supplied with RPA) around the perimeter of the back panel of the
RPA. This provides filler between the RPA and the wall surface.
8. If the unit has a cooling coil and drain pan, pass the drain hoses
that come out the back of the unit through the RPA. These hoses
must gravity drain downward to the outside or to a drain. They
must allow condensate to drain freely to the outside without
restriction and without inhibiting the operation of the dampers. (It
will be necessary to cut away enough of the bird screen in the
back of the exterior louver to allow the condensate hoses to pass
between the blades of the louver to the exterior.)
Refer to custom shop and installation drawings instructions in
the Information Package that was sent with the unit for exact
measurements, descriptions and installation details.
Top Duct Cover
1. Carefully unpack the top duct cover
2. Remove the front access covers from the appropriately selected
top duct cover.
3. Place the back/side portion of the top duct cover on top of the unit
and against the wall using screws. (It will be necessary to push
back the insulation to access the bare metal to start the screws.)
4. Fasten the bottom edges of the cover to the top of the unit using
screws.
5. Complete and test all service connections (electrical, plumbing,
refrigeration, etc.) required for the ventilators operation.
6. Reinstall the front access cover of top duct cover.
For more information on assembly and installation consult the
Information Package that is sent with the Unit.
Owner’s Manual
11
