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

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 88. 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)
Fig. 19 — Splice Plate Usage
HEX HEAD
BOLT
END
UNIT CURB
Fig. 20 — Corner Bracket
Fig. 21 — Fasten Cross Supports
program.
®
CURB SPLICE
PLATE
FLAT WASHER
SEAL STRIP
HEX NUT
LOCK
WASHER
SIDE
CORNER BRACKET
UNIT CURB
CURB
CHANNEL
The return and supply ducts must be supported inde-
pendently from the unit. Do not exert weight or downward
force on the unit other than minimal force required to attach
ductwork.
Before the unit is installed, gasketing must be installed be-
tween the curb and unit as shown in Fig. 22. This gasket mate-
rial is supplied by the curb manufacturer. If gasket is not sup-
plied 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 stretch-
ing 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 material overlap
seams in the curb rail. See Fig. 22 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 cor-
rectly oriented with respect to the curb inlet and discharge
locations.
On curb installations, lower the unit directly into place, en-
suring that the roof curb gasket does not shift or curl.
RAIL SEAM
RAIL SEAM
Fig. 22 — 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 calculations.
For pier-mounted units, one pier must be installed in each cor-
ner of the unit, at the junction of the base rail corners.
For each additional 8 ft of length, for size 03-110 units, in-
stall one additional pier on each size of the unit at the junction
of each section split underneath the base rails. See Fig. 23 for a
typical installation.
85
BUTT JOINTS, DO
NOT OVERLAP
GASKET SEAM
WRONG METHOD
GASKET SEAM
RIGHT METHOD
As an alternative to curb