210.100-IOM (JUL 2018)
Page 23
ACUAIR
®
HYGIENIC AIR UNITS
INSTALLATION
ACUAIR FRESH AIR INTAKE PLENUM
1. The fresh air intake plenum and hoods will be shipped as
an assembly on smaller cfm units. The plenums will arrive
with one set of hoods unmounted for larger cfm units.
Figure 23 - Fresh Air Intake Plenum Ready for Shipping
Figure 24 - Detached Intake Hoods Ready for Shipping
2. The plenums and all hoods are assembled in the factory
prior to preparing for shipment. (Not all of the attachment
screws are installed in hoods that will ship unattached)
Figure 25 - Fresh Air Intake Plenum and Hoods Preassembled
in the Factory
3. For those unit arriving with unattached hoods, reattach the
hoods starting with a hood in the bottom position first. Use
the factory attached hoods as a model as well as the existing
screw holes to finalize locations.
4. The AcuAir unit is provided with plenum alignment tabs
and attachment clips to assist with correctly positioning the
plenum assembly and holding it in position as it is secured to
the air unit. (See Figure 27). The Alignment tabs are installed
in the factory.
The attachment brackets are shipped loose along with cap
screws to mount the brackets and bolts for securing the
plenum in the brackets. In preparation for lifting the plenum
into position, mount the two brackets using the cap screws
provided.
5. Prior to placing the hood in the mounting position, apply a
continuous bead of polyurethane caulking on the face of each
vertical hood flange and across the face of the top flange.
6. The Plenum and hood assembly can be lifted using the
lifting lugs provided on the top if the plenum
7. On the blank wall of the plenum is an access panel. This
panel can be removed to provide access to the inside of the
plenum when attaching it to the fresh air opening on the
AcuAir unit.
8. Apply continuous beads of polyurethane caulking on the
face of the plenum flanges. The caulking should be on the
outside of the factory drilled attachment screw holes. This
caulking will prevent rain water from reaching the attachment
screw penetrations once the plenum is mounted to the AcuAir
unit. See Figure 26.
Fresh Air Plenum Caulking
Factory Drilled
Tapper
Screw Holes
Site Applied Caulk to Seal the
Plenum to the AcuAir Unit
Figure 26 - Applying Caulk to Plenum
9. Using a crane, lift the plenum with mounted hoods into
position for attaching to the AcuAir unit. The four alignment
tabs are intended to guide the hood into position horizontally.
10. Position the two inner legs under the plenum into the
two attachment brackets and insert the four bolts through
the brackets and legs. This will secure the plenum in position
vertically. The two outer legs must rest securely on the
additional site support.
Summary of Contents for AcuAir
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