Installation, Operation & Maintenance Guide
Matterhorn 880/882
7
1-888-MY-AIR11 CAG-06-21-003 AtmosAir.com
Duct Cut-Out and Quick Change
Plate Procedure
PLEASE READ ENTIRE PROCEDURE BEFORE STARTING:
Notes:
■
Utilize the Quick-Change Plate (Q.C.P.) in thin ducts,
fiberboard ducts or where relatively frequent dismounts
may occur.
■
Additionally, the Q.C.P. may be used to compress loose
fiberglass insulation and prevent damage due to airflow.
■
It is not necessary to use the Q.C.P. in all instances. #10
self-tapping screws are provided for other instances. Screw
directly into duct. Use the Q.C.P. as the template for cut-out
of duct.
■
Provide enough electronic clearances for the tubes, no
metal tube parts, or brackets may contact any part of the
duct, 38.1mm (1.5”) of clearance is recommended.
Procedure:
1.
Always measure for clearances for the tubes and wires prior to
any other steps. Then, place the Q.C.P. in the appropriate area.
2.
Holding the Q.C.P. in place, use a marker to trace the
INNER
perimeter as shown in the image in the bottom-left. *Skip the “T”
clamp features when tracing*.
3.
Before removing the Q.C.P., also use the marker to mark the
center point of the 6 PEM-NUT holes.
4.
Using appropriate tools, cut out the traced area in the duct.
INSIDE PERIMETER
.
5.
Drill out the 6 marked holes with a 5 mm (3/16”) or 6.5 mm (¼”)
drill bit.
NOTE
: The Q.C.P. is sized so it will
JUST
slip into duct at an
angle as shown in the image in the bottom-right.
6. DO NOT
Screw in the 8-32 × 38.1mm (1.5”) long screws
(provided) in from the
BACK
of the Q.C.P. until
AFTER
you
have placed the Q.C.P into the duct through the cut-out.
7.
Align the Q.C.P so that the PEM-NUTS are protruding into
the duct, flat-side towards the duct wall. (This is so the
Q.C.P will sit flush to the inside of a duct.)
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