IM 777-8 • Skyline Air Handler 12 www.DaikinApplied.com
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Piping Vestibules
The Skyline air handler has 2 options for piping vestibules. The
curb ready base unit has a factory installed vestibule and the
unitized base option has a field installed vestibule. See order
for details.
For units that include a piping vestibule, cut the openings for
routing the field piping as required in the field. Carefully seal
passages cut through the panels to prevent air leakage. A
single metal thickness pan is provided in the bottom of the
curb-mounted vestibule. The pan can be removed if necessary.
If holes are cut into the pan for a piping passage, seal the
holes to prevent moisture leakage (
Figure 20
).
Figure 20: Seal Holes for Piping—Curb Mounted Units
For units with standard base rails, the vestibule is open to the
coil section; therefore, seal all holes to prevent air leakage.
Figure 21: Seal Holes for Piping—Standard Base Rail Units
Field-Installed Vestibule
The unit can be shipped with an optional field installed
vestibule. Vestibule will ship fully assembled on a separate
shipping pallet. Lifting lugs are located at the top of the
vestibule. Field installed vestibule is designed to mounted on a
Skyline roof curb. See
IM 770
for curb installation details.
WARNING
Use all lifting points. Improper lifting can cause severe
personal injury and property damage.
CAUTION
Lifting points may not be symmetrical to the center of gravity
of the unit. Ballast or unequal cable lengths maybe required.
Field-Installed Vestibule Installation
The vestibule comes completely assembled from the factory.
1. Inspect the gasket and splice collar to ensure they are
secure and not damaged. Refer to
Figure 22
, Detail A.
2. Follow the instructions to attach rigging and lift the
vestibule vertically. Remove the shipping pallet.
3.
Apply a continuous bead of caulking to the vertical flange
of the vestibule roof cap on the side that faces the unit
(
Figure 23
).
4. With the unit in position, lift the vestibule onto the
vestibule curb and align it as close as possible to its final
position. Make sure not to damage the gasket on the
side of the unit. Refer to
Figure 22
, Detail A.
5. Use the crane and rigging to relieve the weight of the
vestibule, manually push and slide the vestibule next to
the unit.
6. Access the inside of the vestibule by opening the door or
removing the outer panel.
7. Use the supplied mounting screws to connect the
vestibule to the unit, screwing through the flange of the
vestibule and into the small binding holes of the splice
collar. See
Figure 24
.
8. Once the vestibule is secured to the unit, remove the
rigging and apply additional caulking to both corner
seams. See
Figure 25
.
Seal holes
cut for piping
Seal holes
cut for piping
