Electrical connections
CAUTION: Disconnect all electrical power at the breaker or fuse box before you begin to install or service any cooler.
Wiring for this cooler must comply with any and all applicable codes. It is recommended that a licensed electrician
install any required wiring.
To remotely operate this unit, use an ECR-6 switch. It is equipped with 2 cooling positions, 2 vent positions and a pump
only position to wash or pre-wet the pads.
The junction box mounts in the corner post of the fan section. Receptacles are provided for the motor and pump.
All wiring connections must be made inside the junction box. See wiring diagram below.
Motor pulley installation
1. Loosen both set screws on the pulley. Use 5/32” hex key Allen wrench.
2. Slide the pulley onto the motor shaft with the threaded side out.
3. Install the belt and align the motor pulley and blower pulley.
4. Align the set screw on the motor side of the pulley with the flat portion of the motor shaft and tighten.
Motor pulley adjustment
1. Turn the outside jaw of the motor pulley clockwise until the pulley is fully closed.
2. Align the outside set screw with the nearest flat spot on the threaded portion of the pulley. This is the zero position.
3. Turn the outside jaw of the pulley counterclockwise 3 full turns. Align set screw with a flat on the threaded portion of the
pulley and tighten. This step will ensure that your cooler will run without overloading the motor. Further adjustment
may be required.
Warning: if set screw is tightened onto threads, damage will occur and pulley will no longer be able to be adjusted.
When the installation is complete and all panels are in place, check the motor amperage using clamp-on type ammeter.
Since all the cooler access panels must be in place to get a true reading, check amperage at a disconnect box, breaker or
fuse box.
4. Find out the amperage from the motor nameplate.
5. Clamp ammeter around the incoming white lead.
6. Start the cooler on HI VENT.
7. If amperage is less than motor nameplate rating, loosen the outer set screw of motor pulley, then turn the outer jaw of
the pulley clockwise ½ turn and tighten the outer set screw. Recheck the amperage and repeat step if necessary.
8. If amperage is more than motor nameplate rating, loosen the outer set screw of motor pulley, then turn the outer jaw of
the pulley counterclockwise ½ turn and tighten the outer set screw. Recheck the amperage and repeat step if
necessary.
9. Proper belt tension is crucial to efficient operation and motor and belt life. See the maintenance section for instructions
on achieving proper belt tension.
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