Essick SI-500S, SI-500S12, SI-500D, SI-500D12, SI-700S12 Owner's Manual

ESSICKAIR

The Cool One

Owner’s Manual

Model #’s

SI-500S , SI-500D

SI-700D , SI-700S

SI-500S12 , SI-500D12
SI-700S12 , SI-700D12

SINGLE INLET

Horizontal And Down Discharge

Evaporative

Air Cooler

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Instruction Manual!

Our Mission:

We Will Respond to Our Customers With High Quality Products

and Service, While Eliminating Waste From Our Processes.

P/N 70093

REV 4/02

Evaporative Cooling
Evaporative cooling uses the principle of evaporation to lower the air temperature. Hot, dry air is passed through wetted
filters and is converted to refreshingly cooled air. Essick Coolers make the best use of the evaporative process by
controlling the flow of water, spreading the water evenly over the filters, and keeping a steady stream of cooled air
entering your home. It is exhausted out open windows or doors, carrying heat, smoke and odors along with it. Essick
evaporative coolers are 80% less costly to operate than refrigerated air conditioners.

Cautions: To prevent harm to yourself and others, and to avoid damage to your cooler, PLEASE follow these guidelines.

SAFETY GUIDE LINES & CAUTIONS

When Installing When Operating When Servicing

Make sure that unit is installed on a sound
structure that will support the full operating
weight of the cooler. See page 5.

Before attempting to transport cooler to the roof.
Separate fan section from wet section to reduce
weight. Always plan a safe method of
transporting cooler to installation site without
damage to the cooler or injury to yourself.
Do Not connect power to cooler before
installation is complete.
Wear gloves and protective eyewear when
installing or servicing.

Make sure that cooler circuit is equipped with a
(slow blow) breaker large enough to support the
full amperage of the cooler.

To reduce the risk of fire or electrical shock, DO
NOT use this fan with any Solid-state speed
control device.

This cooler is equipped with an automatic
thermally protected motor. If it shuts off on its
own for any reason, it can restart without
warning.

Be sure to disconnect unit from power
source before servicing. If not, it can be
turned on from inside the house and start
unexpectedly.

Never drain water onto your roof. Water
residue could cause you to slip or may stain
your roof.

If the motor shuts off because of thermal
overload, check into the problem
immediately. If allowed to continue,
permanent damage will occur.

Tools and supplies needed for installation

 Pliers
 Screwdrivers
 Adjustable wrenches
 Tubing cutter
 5/32 hex key wrench
 Level
 Electric drill

 Drill bits
 Hammer
 Duct tape
 Caulk
 Sheet metal screws
 ECR-6 wall switch
 Safety glasses

 Wiring supplies – It is recommended that a licensed

electrician do all electrical work.

 Ductwork – A local sheet metal shop can supply ductwork.
 ¼” water line
 Saddle valve or faucet adapter
 Roof stand (if cooler is roof mounted)
 Roof flashing and pitch

Mounting

1. Prepare duct to fit model used (500 series coolers 17 ¾” square; 700 series 19 ¾” square).

2. Cut opening in wall or roof to fit duct. If wall studs or roof joists are cut, reinforce them.

3. Mount the duct in the opening. The duct will fit inside the cooler opening. The duct length from roof to bottom of cooler

should be a minimum of 4” at the closest point, so there is access to the water drain.

4. Install flashing around roof opening to prevent water entry. Use pitch to seal the seams.

5. Measure cooler and layout mounting location.

6. Mount cooler to stand or pad. Cooler must be level front to back and left to right. Note: It is best that the fan section

end of the cooler face up the roof to achieve a lower profile and allow better access to the drain.

7. Be sure to securely fasten all four corners of cooler to stand or pad.

8. Caulk duct to the cooler to prevent air leakage.

Motor mounting

Warning: Do Not energize the cooler until the installation is complete.

1. Place the motor into the cradles. Be sure that the cradles fit into the groove in the

motor grommets.

2. Secure with the saddle clamps provided in the installation package. DO NOT

OVERTIGHTEN.

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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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