Acme Engineering WAA Installation Manual
Form 613120
Read and Save These Instructions
ASSEMBLY INSTRUCTIONS FOR MOTORIZING
WAG, WAA, WAGC & WAAC Single & Double Panel Backdraft Dampers
This CAM motor operation package consists of four major components;
motor with base, CAM assembly (with pull spring, CAM pulley and spring
retainer) and hardware. Follow steps in sequence for best results.
Make all electric connections using good wiring practices and in
accordance with National Electric Code and any local codes.
HINTS (A) On new installations, assembly of the motorizing kit would be
(B) DO NOT ATTACH THE CAM OPERATOR TO THE MOTOR
Single Panel Instructions
1. Refer to Chart 2 on page 5 for proper retainer hole location. Attach the pull spring retainer to the backdraft
damper ladder bar using two (2) bolts and lock nuts.
Opening the unit will give easy access to the ladder
bar.
2. Mount the motor and base using three (3) No. 8
screws (and three (3) speed nuts on aluminum
frames) by aligning the slots in the motor with the three
(3) holes in the frame. (Note: On some models the
backdraft damper frame is not pre-drilled. In this case,
use the motor base as a template to locate the proper
locations. For single panel units, the motor base
should fit in the lower left corner of the backdraft
damper as viewed from the inlet side. The motor base
Step 1 TOP VIEW
more easily done prior to installing the damper.
UNTIL THE CAM ASSEMBLY IS ATTACHED TO THE
BACKDRAFT DAMPER LADDER BAR AND THE MOTOR IS
ATTACHED TO THE BACKDRAFT DAMPER FRAME.
should be square to the backdraft damper. Self drilling
screws can be used to secure the motor base to the
backdraft damper frame. As an alternate to the self
drilling screws, .125" diameter holes can be pre-drilled
to use the #8 screws provided in the motor kit.
3. Attach the CAM pulley to the motor shaft. Position the
CAM assembly so that approximately 1/8" of the motor
shaft is showing through the CAM pulley, then tighten
the cam clamp bolt.
4. Check to see that all other bolts in the assembly are
tight.
IMPORTANT
ASSEMBLE IN THIS MANNER:
Bolt through ladder bar first, then
retainer, then lock nut.
Step 2
Step 3
Backdraft Damper Double Panel Installation - WAGC & WAAC
Step 1
Refer to chart 1 for proper retainer hole location. Attach the pull
spring retainer to the backdraft damper ladder bar using two (2)
bolts and lock nuts. Opening the unit will give easy access to the
ladder bar.
CHART 1
MATCH RETAINER HOLE LOCATION TO BACKDRAFT
DAMPER MODEL SIZE BELOW
ABCC
4040 4141 4242
4343 4444 4545 4646
4747 4848 4949 5050
5151 5252 5353 5454
5555 5656 5757 5858
5959 6060 6161 6318
6363 6340 6565 6362
6767 6464 6969 6262
7171 6868 6666
7272 7070
IMPORTANT
ASSEMBLE IN THIS MANNER:
Bolt through the ladder bar first, then retainer, then lock
nuts.
Step 2
Mount the motor and base as shown using three (3) No. 8 screws (and three (3)
speed nuts onaluminum frames) by aligning the slots in the base with the three
(3) holes in the frame and center bar.
WAAC
WAAC With Light Shields
Step 3
Attach the CAM pulley to the
motor shaft. Position the CAM
assembly so that approximately
1/8" of the motor shaft is showing
through the CAM pulley then
tighten the Cam clamp bolt.
Page 2
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