Instructions / Assembly

5A. Motor Pulley Selection:
The motor pulley must be the same size and type
recommended by cooler manufacturer. Do not use a
larger pulley size. Recommended motor pulley sizes
are:
1/3 HP Motor:
3¼" adjustable, or 2¼" to 2½"
fixed with ½" bore.
1/2 HP Motor:
3½" to 3¾" adjustable, or 2½" to
2¾" fixed with ½" bore.
3/4 HP Motor:
3¾" adjustable, or 3" to 3¼" fixed
with ½" bore.
1 HP Motor:
(Single inlet
cooler only)
4" adjustable, or 3¼" to 3½" fixed
with 5/8" bore.
IMPORTANT: Too large of a motor pulley will
“overload” motor and cause it to cycle on and off. If this
occurs, see Motor Pulley Adjustment.
5B. Motor Pulley Adjustment:
Important: This motor will work only if:
1. correct size pulley is used (see front);
2. moveable half of the adjustable pulley is opened 2-
1/2 to turns (see below);
3. belt tension is correct (see front).
Warning: Disconnect electrical power source prior to
working on cooler.
1. Loosen set screw on movable half of pulley with
5/32 Allen wrench.
2. Unscrew moveable half of pulley 2-1/2 to 5 full turns
from the closed position.
Pulley setting depends on the resistance to air
flowing out the cooler.
3. Re-tighten set screw on moveable half of pulley.
4. Re-adjust belt tension (see Belt Tension).
5. Operate cooler with pad frames in place.
a. If motor runs continuiusly, installation is
complete.
b. If motor stops after a period of time (and
restarts later) the motor is “overloaded” and the
movable half of the adjustable pulley must be
opened ½ or more turns. Repeat steps (1) to
(5).
Note: To increase cooler efficiency, during step 2,
use an ammeter to adjust the pulley diameter until
the motor amperage draw is equal to, or less than,
the amperage on the motor name plate.
Limited Warranty
(1) Replacement made through your authorized dealer or
retailer within one year from date of sale with proof of
purchase.
(2) Reason for replacement, purchase date, failure date,
and sales receipt must accompany all motors returned
for replacement.
(3) Warranty is void if motor has been abused, altered,
water damaged or improperly installed.
(4) The manufacturer is not responsible the cost of a
service call at the site of installation to diagnose cause
of trouble or the cost of labor or transportation to replace
a defective motor.