Full Product Manual
WARNING: FAILURE TO FOL-
LOW INSTRUCTIONS AND
USE SAFE ELECTRICAL PRO
-
CEDURES COULD RESULT IN
SERIOUS INJURY SUCH AS
SHOCK OR ELECTROCUTION.
SAFETY PRECAUTIONS:
1. Disconnect electrical power
at source before working on
or near a motor or its con-
nected load.
2. This motor must be grounded
by attaching the power sup-
ply green ground wire to the
motor terminal green screw.
3. Caution: Motor may stop and
restart without warning.
If motor is “overloaded”, it will
become unusually hot and the
automatic internal overload
switch will cause the motor to
stop. The motor will then au-
tomatically restart after cool-
ing down. An “overloaded”
this occurs, see Motor Pulley
Adjustment section.
4. Install all wiring, fusing and
grounding in accordance with
National Electrical Code, local
requirements, and according
to cooler manufacturer’s in-
structions.
5. Keep all parts of body and
loose clothing clear from
belts, pulleys and other ex-
posed parts at all times.
MOTOR INSPECTION INSTALLATION INSTRUCTIONS
1.
1. Examine motor thoroughly to be sure
it was not damaged in shipment.
2. Check the motor shaft. It should ro-
tate freely when turned by hand.
3. Check nameplate rating. Voltage
and frequency must match the elec-
trical power source. Motor HP must
be suitable for your cooler size.
MOTOR PULLEY SELECTION
The motor pulley must be the same size
and type recommended by cooler manu-
facturer. Do not use a larger pulley size.
Recommended motor pulley sizes are:
Pulleys must be aligned per Figure 1.
If necessary, loosen pulley set screws
with 5/32 Allen wrench. Each set screw
must seat securely on at of shaft.
Adjust belt to deect 1/2 to 3/4 inch
with about 3 lb. of force at center of
span as per Figure 2. Re-adjust belt
tension after any pulley adjustment.
Replace worn or damaged belts.
Align Motor and Blower Pulley
with V-Belt in Place
(Figure 1).
Adjust Belt Tension
(Figure 2).
Blower
Pulley
Motor
Pulley
Belt
Alignment
Tighten
Clamps
Vent Holes
Facing Downward
Place motor in motor mounting bracket
with vent holes down and motor label
up. Be sure groove in rubber mount-
ing rings seats securely on mounting
bracket. Tighten clamps.
1/3 HP Motor: 3¼” adjustable, or
2¼” to 2½” xed with
½” bore.
IMPORTANT: Too large of a motor pulley
will “overload” motor and cause it to cycle
on and o. If this occurs, see Motor Pul-
ley Adjustment section.
1/2 HP Motor: 3½” to 3¾” adjust-
able, or 2½” to 2¾”
xed with ½” bore.
1 HP Motor:
(Single Inlet
Coolers Only)
3/4 HP Motor: 3¾” adjustable, or
3” to 3¼” xed with
½” bore.
4” adjustable, or 3¼”
to 3½” xed with 5/8”
bore.
COOLER
MOTOR
INSTRUCTIONS
EVAPORATIVE
COOLER MOTOR
½” to
¾”
Replace Worn
Belts