IM777
Page 5
Curb Mounting and Leveling
Do not place a Skyline unit over an open curb unless it is
equipped with a curb-ready base. Installation instructions for
mounting units on a roof curb are provided in IM770. For a
copy, contact your local McQuay Representative or visit
www.mcquay.com. Make provisions under the unit to divert
any moisture from entering the building below.
For units without roof curb mounting, place the equip-
ment on a flat and level surface. Where surface irregular-
ities exist, shim the base of the unit at one or more points
along the length of the rails to prevent distortion or sag-
ging. Uneven or distorted sections will cause misfit or
binding of the doors and panels and improper draining of
drain pans.
See Figure 4.
Figure 4. Leveling the unit
Section Assembly
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 leav-
ing air side of the shipping section that seals against the
frame channel on the entering-air side of the adjoining sec-
tion. The splice joint is insulated, and provides an air-tight
seal between two sections once they are assembled together.
The Splice Joint must be aligned to seat into the mating gas-
ket to provide an air seal. If the Splice Joint was bent during
shipping or rigging, verify it is restored to its original posi-
tion.
Figure 6 on page 5.
Use the following procedure to assemble shipping sections:
1. Caulk all assembly joints of the unit. The mating faces of
the cabinet must have at least a 1/4 inch diameter bead of
sealant applied before the sections are joined. Use the
splice joint as a guide for application of the sealant.
See
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.
3a. Fasten base rails together first using the 3/8"-16 by 5"
bolts found in the splice kit provided with the unit
See Figure 6.
To fasten 2 shipping sections together, 4
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.
Figure 6. Fasten bottom of section
3b. If desired, shipping sections for non curb-ready units can
be fastened together internally. Internal fastening is
achieved by running 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.
Shim to prevent
distortion if width
is over 108"
Shim sections until
they are straight
and level
1 / 4 " d i a m e t e r
b e a d c e n t e r e d
i n f a c e o f
c l e a r a n c e
U s e S p l i c e
J o i n t a s a
g u i d e
3 / 8 x 1 " B o l t a n d N u t
Содержание Skyline IM777
Страница 27: ...IM777 Page 27 Notes...
