Duct Connections - ECR EMI America Series Installation, Operation And Maintenance Manual

Branch duct and fresh air duct collars can be
attached to the cassette chassis by following
the steps below.
NOTICE
Recommendation — no more than
10 feet (3m) of branch duct or fresh air
duct should be installed.
1. Locate the knock-out holes (
Page 14).
NOTICE
The number of knockouts varies with
unit size.
Branch duct knock-outs are 5¼"
(133mm) round.
Fresh air knockouts are:
• 1¼" x 2½" (32 x 64mm) rectangular
on models 9 & 12.
• 3" (76mm) square on models 24
and 36.
2. Cut the black insulation around the
knock-out (Figure 13, Page 14).
3. Snip the tabs holding the knock-out in
place (Figure 13, Page 14).
4. Remove the metal knock-out and the
black insulation behind it.
5. Attach the duct collars (field supplied) to
the chassis using self-drilling screws.
6. Repeat steps above for remaining duct
work.
Comfort where it counts
CACG/CAHG & CACH/CAHH
• Installation, Operation and Maintenance Manual •

Duct Connections

Figure 12
Figure 12,
Figure 13
14
Air Handlers
Knockouts
branch Duct knockout
Cassette 12
CAssette 24 & 36
Cut insulation and snip out
knockouts
P/N 240007756, Rev. A [051509]
fresh air
knockout