Daikin Vision CAH 003-090 C Installation And Maintenance Manual page 10

Extended Coil Section Mounting
The extended coil section is 6" wider than all other sections of
the same unit size. The extension is always located on the coil
connection side of the unit . Because the extended coil section
is wider than other sections, it always ships as a separate
shipping section, and must be joined to other sections in the
field. To join an extended coil section to other components, first
follow the Horizontal Airflow Section Mounting‚ page 7 steps to
secure the opposite connection side . To fasten the connection
side, use the following procedure:
1 . If the unit has a factory-installed base rail, the extended
coil section base rail is also 6" wider than the adjoining
base rail . Extended coil section base rails on the
connection side are fastened together using the 3/8"-16
by 3" bolts located in splice kit provided with the unit
(Figure 13) .
2 . If no base rail is provided, the section is fastened in the
same manner on the bottom and top . Once the sections
are positioned together, remove the fastener in the
corner of the channel piece of the section mating to the
extended coil section
3 . Place an L-shaped section joining plate (located in the
splice kit) over the coned hole in the channel .
4 . Replace the flat head fastener originally used in the
corner with a 5/16"-18 1" bolt and fasten it through the
L-shaped joining plate .
5 . Position the L-shaped joining plate so it butts up against
the extended coil section frame channel . To secure
the plate to the extended coil section, run two 1/4" × 1"
drill screws through the joining plate and into the frame
channel .
Figure 13: Extended Coil Section Joining
T o p
V i e w A
B o t t o m
w i t h b a s e r a i l
IM 672-11 • VISION AIR HANDLING UNIT
(Figure 13) .
( 2 ) 1 / 4 x 1
D r i l l S c r e w s
A
Side-by-Side Heatwheel Section Joining
The side-by-side heatwheel will have two individual sections
parallel in the direction of airflow to be attached to either side.
Each section will attach to the heatwheel section and then to
the other parallel section .
1 . Rig the unit into position and line shipping sections up in
direction of air flow. Sections must be pulled together to
fasten using a furniture clamp or straps .
a . If the heatwheel section width is greater than 143",
then rig the section into position using the two
removable lifting channels . After section is properly
placed, remove cotter pin and bolts from lifting
channel and discard as seen in
Figure 14: Cotter Pin and Bolt Detail
2 . If included, remove center base plates that are attached
to the base channels and save for Step 4 .
3 . If the unit has a factory installed base rail, fasten the
base rails together using the 3/8"-16 × 5" bolts located in
the splice kit provided with the unit.
a . To fasten two shipping sections together, two
bolts are required on the one side . 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 .
4 . Assemble the center base plates as show in
leaving a 5/16" space between each plate to slide onto
section base channels to center point of section width.
5 . Once the sections are positioned together, remove the
fastener in each of the channel corners (on the mating
edges in the channel piece) .
6 . Place a flat section joining plate (found in the splice kit)
over the two coned holes in the channels, so the plate
spans the two sections.
10
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eChanICal nsTallaTIon
Figure 14
Figure 15,
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