Motor Pack
INSTALLATION INSTRUCTION
This publication contains the installation instructions for Motor Packs. Carefully read this publication prior to any installation
or maintenance procedure. For additional safety information, refer to AMCA publication 410-96, Safety Practices for Users and
Installers of Industrial and Commercial Fans.
Receiving and Inspection
Immediately upon receipt, carefully inspect for damage and/or shortage. Record on the Delivery Receipt any visible sign of damage.
screw post
nylon spacer
8-32" x 3/8" screw
8-32" x 3/8" screw
screw post
1. With dampers in the open position, install the motor mount bracket using two 3/8 inch screw posts, a 5/16 inch spacer and 8 - 32 x
3/8 screws.
2. Connect the tie rod and link using 3/8 inch screw posts, 8 - 32 x 3/8 inch screws, and a nylon spacer.
8-32" x 3/8" screw
10-24" screw and nut
Hinge pin for 3" blades
8-32" x 1/4" screw post
Lever arm
Link
Tie rod
5/16" spacer
8-32" x 1-3/4" screw
Spring retainer
3/8" OD washer
1/4" screw post
Nylon spacer
(4) 8-32" x 3/8" screw
Spring
8-32" x 3/8" screw post
Blade size
(3" or 4")
See reverse side for Motor Pack Parts Checklist and Wiring Diagram.
(2) 8-32" x 3/8" screw post5/16" spacer
Motor Pack Parts Checklist
No. of
Parts
Description
3 8-32” x 3/8” screw post
1 8-32” x 1/4” screw post
2 3/8” flat washer
8 8-32” x 3/8” screws
1 8-32” x 1-3/4” screw
1 10-24” screw and nut
1 Spring
1 Nylon Spacer
1 3/4” x 4” lever arm
1 3/4” x 5-1/2” lever arm
2 5/16” spacers
Typical Damper Motor Schematic
Fan
Motor
Transformer**
Damper
Motor*
Transformer**
Second
Damper
Motor
L3
L2
L1
For 3 phase, damper motor voltage should be the same between L1 and L2. For single phase application, disregard L3. *Damper motors may be available in 115, 230 and 460 volt models. The
damper motor nameplate voltage should be verified prior to connection. ** A transformer may be
provided in some installations to correct the damper motor voltage to the specified voltage.
2
MOTOR PACK IOM SUPPLEMENT - Feb. 2014