6
Daikin
IM 777-7
Mechanical Installation
If the unit is supported on rails they must be placed around the
entire perimeter. Additional Supports must be placed
perpendicular to airflow spanning the full width of the unit at
all shipping splits. If the unit is over 107” wide these supports
must also be placed at the entering and leaving edges of fan
and cooling coil sections. The perimeter rails must be at least
2” wide at the top and capable of carrying the entire weight of
the unit. The cross supports must be 4” wide at the top and
capable of carrying the weight of the two sections it spans. The
cross supports shall be placed such that 2” of the top is
supporting each section. The perimeter rails shall be placed so
that they are fully supporting the outer 2” of the unit. If shims
are required they must be placed such that the unit is fully
supported.
Figure 4: Leveling the Unit
Assembling Sections
If the unit is shipped in more than one shipping section, rig
each section into position separately. Shipping sections are
provided with a connection splice joint attached on the leaving
air side of the shipping section that seals against the frame
channel on the entering-air side of the adjoining. The splice
joint is insulated and provides an air-tight seal between two
sections once they are assembled together. Align the splice
joint to seat into the mating gasket to provide an air seal. If the
splice joint was bent during shipping or rigging, restore it to its
original position (
Figure 9
)
.
For Skyline
Plus
units, ensure that
the D-gasket is attached to the entering air side frame channel
(
Figure 7
and
Figure 10
).If it dislodged during shipping,
restore it to its designed position.
Shipping Sections
1
Caulk all assembly joints of the unit—Before joining the
sections, apply at least 1/4 inch diameter bead of sealant
to the mating faces of the cabinet. Use the splice joint as
a guide for applying the sealant (
Figure 5
).
Figure 5: Apply Sealant to Mating Faces
2
Pull sections together to fasten. Use straps and a ratchet
to help pull the sections together securely.
Apply sealant
to any gaps that may admit moisture.
3
Fasten base rails together first using the 3/8"-16 × 5"
bolts located in the splice kit provided with the unit
(
Figure 7
).
a
To fasten two shipping sections together, four bolts
are needed (two on each side of the unit). The bolts
are run from one base rail into the other and fastened
with a nut. Complete each section bottom and top
before attaching additional sections.
b
If desired, shipping sections for non curb-ready units
can be fastened together internally. To fasten
internally, run field-provided #10 sheet metal screws
or drill screws (4" long, maximum) through the
interior frame channel of one unit into the splice joint
of the neighboring section.
c
Handle units with curb-ready bases and vestibules so
the lifting bracket can be removed after the unit is
placed on the curbing.
Note:
Remove the lifting bracket that projects inward over
the curbing. Save the self tapping screws. When the
adjacent section is placed in position, use self
tapping screw to secure the bases together.
Figure 6: Remove Vestibule Lifting Bracket
Figure 7: Fasten Bottom of Section
S h m t o p r e v e n t
d t o r t o n f w d t h
o v e r 1 0 8 "
S h m e c t o n u n t l
t h e y r e t r g h t
n d l e v e l
1 / 4 " d
m e t e r
b e d c e n t e r e d
n f c e o f
c l e r n c e
U e S p l c e
J o n t
g u d e
R e m o v b l e
L f t n g B r c k e t
3/8" x 1" Bolt and Nut
“D”
Gasket
