4
McQuay IM 672-3
Installation Guidelines
4
If no base rail is provided, fasten the unit in the same
manner on the bottom and top frame channels.
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 that the plate
spans the two sections.
7
Replace the fasteners in their original position, through the
joining plate.
Figure 7: Horizontal joining sections
Vertical inverted airflow section mounting
For vertical or inverted arrangements, before lifting any top
mounting sections into place, rig into place and fasten together
the bottom tier of sections. Once bottom level sections are in
place and secured, lift stacked components and fasten using
the following procedure:
Note –
See “Face and Bypass Section Mounting” on page 7 for
the exception to this procedure.
1
The vertical/inverted section has a splice joint extending
out the top of the bottom joining section. Lower the section
that is to be positioned over the opening over the splice
joint to seal the connection between the two sections.
2
The two sections are fastened together at the four bottom
corners of the mating edge. To fasten the corners located on
the end of the unit (where bottom section and top section
walls are flush with each other), remove the flat head
fasteners in the corners of both sections.
3
Cover the coned holes with a flat joining plate and replace
the flat head fasteners in the holes to secure the joining
plate to both sections. See Figure 8
.
4
When one section is deeper than the other, secure the two
sections using an L-shaped joining plate. To secure the
L-shaped bracket, remove the flat head fastener from the
corner, position the bracket over the hole, and replace the
flathead fastener with a 5/16"-18 × 1" bolt. Once the bolt is
in place, secure the bracket to the adjoining section with a
1/4 × 1" drill screw. Repeat the same procedure on both
corners of the unit. See Figure 8
.
Figure 8: Vertical / inverted joining sections
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 fastening steps on page 3 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. See Figure 9
.
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. See Figure 9
.
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 9: Extended coil section joining
T o p
B o t t o m w i t h b a s e r a i l
R e p l a c e m e n t s c r e w
. 3 1 2 - 1 8
x 1 0 0 b o l t
. 2 5 x 1 0 0 d r i l l s c r e w
A
B
B
A
V i e w A
B o t t o m
w i t h b a s e r a i l
A
T o p
( 2 ) 1 / 4 x 1
D r i l l S c r e w s
