Peerless-AV ACC120 - Installation - Manual (Page 2)

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Drill three 1/8" dia. holes 3/4" deep into inside
edge of each ceiling joist. Dimensions for locat-
ing holes are pictured. If installing an extension
column (not included) through a finished ceiling,
a 2" dia. hole can be located anywhere along
centerline, but it must be at least 2 3/4" away
from right or left stud.
joist
ceiling
1 1/8"
2 1/4"
5/8
2 1/4" min.
2 3/4" min.
1/8" dia.
2" dia.
A
upper keyslots
C
D
DO NOT USE!
If applicable, drill 2" dia. hole through finished
ceiling at the desired location.
Remember that the hole will have to
align exactly with the hole in the lower
clamping bracket (G).
Insert four #10 x 3/4" phillips screws (A), two
into each ceiling joist. Leave just enough
exposed thread to engage with upper keyslots
in ends of extension brackets (C & D).
Compress extension brackets just enough to
clear the heads of the four screws. Expand &
engage UPPER KEYSLOTS (lower keyslots
not to be used) over heads of screws. An offset
screwdriver may be required. Insert two
remaining #10 x 3/4" phillips screws (A), one
through each center hole in each extension
bracket (C & D). Securely tighten all six
screws.
Slide clamping bracket assembly to desired
position (in alignment with hole in finished
ceiling, if applicable). Tighten all four 1/4-20
nylock nuts (E) securely.
E
G
B
centerline
To install extension column insert through lower clamping bracket (G) into threaded fitting in upper clamping
bracket (B). Tighten four or five complete turns until securely tight.
© 2012 Peerless Industries, Inc. All rights reserved.
Peerless is a registered trademark of Peerless Industries, Inc.
All other brand and product names are trademarks or registered trademarks of their respective owners.
• For added safety, threaded fitting is treated with a special bonding agent that will be activated when extension
column is attached. If extension column is removed at a later time bond will be rendered ineffective. In such
cases, bonding agent such as Loctite
® should be applied to threads before extension column is reattached.
WARNING
ISSUED: 6-12-97 SHEET #: 092-9001-3 08-24-12