McQuay IM 672-7
7
Mechanical Installation
3
If no base rail is provided, fasten the unit in the same
manner on the bottom and top frame channels.
4
Once the sections are positioned together, remove the
fastener in each of the channel corners (on the mating edges
in the channel piece).
5
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.
6
Replace the fasteners in their original position, through the
joining plate.
7
For certain Vision
Plus
units,
use the provided section
joining plates to fasten sections together. Space them as
shown in
Figure 8
. Using the provided ¼"-14 x 1" self
tapping screws, drill screw the joining plates into the frame
channel on each section, keeping unit sections tight
together. Follow instruction drawing included in the
assembly kit.
Figure 7: Horizontal Joining Sections
Figure 8: Frame Channel Stiffener Plates (Vision Plus Units
Only)
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‚ page 12
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 (
Figure 9
).
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 (
Figure 9
).
Figure 9: Vertical/Inverted Joining Sections
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
