Pier Or Beam Mount - Carrier AERO 39MN Installation, Start-Up And Service Instructions Manual

4. The 14 in. tall curbs weigh 6 lb per linear foot, 24 in.
curbs weigh 9 lb per linear foot.
IMPORTANT: Verify installed curb dimensions before
attempting to rig the unit and install it on the curb.
Due to the pressure capabilities of the 39 Series air handlers,
duct connections must be gasketed and screwed to the unit to
prevent leakage. Refer to Duct Connections section on page 50.
No provisions have been made to attach the ductwork to the
curb. Dimensions for inlet and discharge locations are shown in
drawings produced in AHUBuilder
UNIT CURB
CURB GASKET
(OPTIONAL)
A39-2334
Fig. 9 — Splice Plate Usage
HEX HEAD
BOLT
END
UNIT CURB
Fig. 10 — Corner Bracket
A39-2336
Fig. 11 — Fasten Cross Supports
® program.
CURB SPLICE
PLATE
FLAT WASHER
SEAL STRIP
HEX NUT
LOCK
WASHER
SIDE
A39-2335
CORNER BRACKET
UNIT CURB
CURB
CHANNEL
The return and supply ducts must be supported indepen-
dently from the unit. Do not exert weight or downward force
on the unit other than minimal force required to attach duct-
work.
Before the unit is installed, gasketing must be installed be-
tween the curb and unit as shown in Fig. 12. This gasket ma-
terial is supplied by the curb manufacturer. If gasket is not
supplied with the curb, recommended field-supplied gasket
material is / -in. thick by 2-in. wide closed cell neoprene.
1
2
When curb is installed, place gasket on curb without
stretching or overlapping the material, which can cause gaps
or leaks. Butt all joints evenly and avoid creating gaps where
water can leak into the curb. Make sure seams in gasket mate-
rial overlap seams in the curb rail. See Fig. 12 for installation
details.
After gasket is in place, rig unit into position as described
in Rigging and Handling section. Locate unit on curb so it is
correctly oriented with respect to curb inlet and discharge lo-
cations.
On curb installations, lower unit directly into place, ensuring
that the roof curb gasket does not shift or curl.
a39-4330
RAIL SEAM
RAIL SEAM
Fig. 12 — Install Gasketing
Pier or Beam Mount —
mounting, units can also be mounted on I-beams or piers. For
units mounted on I-beams, the beams must run the continuous
length of the unit. If seismic criteria apply, crosspieces must
be added between the beams according to seismic calcula-
tions. For pier-mounted units, one pier must be installed in
each corner of the unit at the junction of the base rail corners.
For each additional 8 ft of length for size 03-110 units, install
one additional pier on each side of the unit at the junction of each
section split underneath the base rails. See Fig. 13 for a typical
installation.
47
BUTT JOINTS, DO
NOT OVERLAP
GASKET SEAM
WRONG METHOD
GASKET SEAM
RIGHT METHOD
As an alternative to curb