Essick CS11, CD21, CS16, CD11, CD16 Owner's Manual

Industrial

Commercial

Owner’s Guide

• INSTALLATION

• OPERATION

• MAINTENANCE

• SERVICING

READ AND SAVE

THIS INSTRUCTION

MANUAL

EVAPORATIVE AIR COOLER

MODELS

CS11/16, CD11/16

CD21

IMPORTANT

Note any damage on the freight bill, as any damage

claim must be filed with carrier.

Motor, Motor Pulley, Pump and Belt are sold

separately

Date purchase: _____________________
Purchased from: ____________________

Manual part # 70888

REV. 1/06

1

INSTALLATION OF EVAPORATIVE COOLERS

PREPARATION

1. All electrical and duct work must comply with local and federal codes.

2. Make arrangements to get the cooler from ground to roof (crane, hoist, etc.).

LOCATION

1. Cooler should not be mounted near exhaust openin gs or vent pipes where fumes and odors can be drawn into cooler.

2. Ensure mounting surface is strong enough to support the cooler. Operating weight will be much heavier than
shipping weight.

3. Locate cooler so that fresh air is drawn in; air is not recirculated.

ROOF MOUNT UNITS

1. Select the location, taking into account roof construction and duct requirements. If rafters are cut when the roof
opening is cut, be sure to strengthen them.

2. Purchase or construct a platform to provide a level, mounting surface for the cooler. Always mount the cooler
high enough to allow easy access to the drain fitting.

3. Measure cooler or use the spec sheet to determine size of platform. Platform must be located so that the discharge
opening of the cooler is in line with the ductwork. On pitched roofs, the platform frame may be covered with galvanized
sheet steel or other weatherproof materials. An opening or removable panel must be left to allow access to the drain
fitting. On down discharge coolers the duct should be fastened to the platform collar before cooler is set in place. The
duct should have a standing flange for the cooler discharge opening to fit. Flash and seal the duct and roof opening to
provide weather tightness.

CAUTION: TO AVOID RISK OF FIRE, ELECTRICAL SHOCK, OR SERIOUS PERSONAL INJURY, BE SURE TO

DISCONNECT POWER FROM UNIT BEFORE CLEANING OR SERVICING.

WARNING: TO REDUCE THE RISK OF FIRE OR SHOCK; DO NOT USE THIS FAN WITH ANY SOLID STATE SPEED

CONTROL DEVICE.

DUCT WORK

1. The most important rule to follow when designing duct work is: AN EVAPORATIVE COOLER DEPENDS UPON
A LARGE VOLUME OF AIR COMING OUT OF THE DUCT WORK AT HIGH VELOCITY IN ORDER TO COOL
PROPERLY.

2. Do not “reduce” the discharge opening of the cooler.

3. Do not undersize the duct work and make it much smaller than the discharge opening. (In most cases, air
conditioning duct work is too small for coolers.)

4. Extra long ducts cause static pressure and will reduce airflow. They also pick up heat and diminish the effect of
the cooled air.

5. The motor pulley may be adjusted to compensate for ductwork.

6. Sharp or abrupt bends hinder airflow.

7. Poorly designed ceiling diffusers will rui n a successful installation. Install diffusers that are designed for use with
evaporative coolers.

MOTOR INSTALLATION

After cooler is in place and level, remove the motor from the box and inspect for shipping damage. Ensure that the motor
voltage, phase and horsepower are correct. Mount motor on motor mount as shown.
Mount the motor using the slots that align the motor pulley and blower pulley.

BELT ADJUSTMENT

An improperly adjusted belt will greatly shorten motor life.
A deflection of ¾” with finger force will indicate proper adjustment.
Do not use the motor pulley to adjust belt tension.
Always use the motor mount to adjust the belt.

2

MOTOR PULLEY ADJUSTMENT

Before installing the motor pulley, loosen the set screw on the back side of the pulley and
turn the outside jaw of the pulley until it is fully closed. Position the set screw over the
closest flat spot in the thread and then open the outside jaw of the pulley 4 or 5 turns.
Position the set screw over the closest flat spot in the thread and retighten the set screw.
Place the pulley on the motor shaft and tighten the front set screw. The CD21 coolers are
equipped with double groove pulleys.

OVERFLOW PIPE INSTALLATION

Place the rubber washer onto the drain bushing. Slide the bushing through the drain
opening, in the cooler bottom, from the top side. Screw the nut onto the bushing from
under the cooler. Position the overflow tube in the bushing.

CAUTION: DO NOT HOOK THIS COOLER TO A WATER SOFTENER. THIS WILL

WATER CONNECTION

VOID THE WARRANTY.

The float mounts in a hole provided in the corner post (down draft) or front panel (side
draft). The water level should remain at least ½” below the top of the overflow tube. A
screw is provided in the float to adjust water level; or the float rod may be bent to adjust
the level.

BLEEDOFF

In hard water areas, a bleed off kit may be installed to dispose of small amounts of
mineralized water, allowing fresh water to replace it.

Reservoir

ELECTRICAL POWER

1. The installation of electrical wiring must conform to all local and federal codes and should be done by a certified
electrician.

2. Connecting the motor and/or pump to the wrong voltage will void the warranty.

Notice to Installer: The motor amperage must be set as close as possible to motor nameplate amps without the pump
running.

WARNING: To avoid risk of electrical shock, disconnect the power before opening or attempting service on this unit.
WARNING: TO REDUCE THE RISK OF FIRE OR SHOCK; DO NOT USE THIS FAN WITH ANY SOLID STATE SPEED

CONTROL DEVICE.

WIRING DIAGRAMS

Three phase; one and two speed. Motor starter to be equipped with overload
relay sized to accommodate motor full load amps.

Motor starters and overloads are not supplied with units.

BLACK

STRIPED

BROWN

RED

1
3

MOTOR

RED

GREEN

3

PUMP

SINGLE SPEED

DIAGRAM

PUMP

115V SUPPLY

3