Essick Air AS15012 User Manual

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1. Read instructions carefully.
2. Disconnect all electrical service that will be used for the unit 

before you begin the installation.

3. Electrical hook up should be done by a qualifi ed electrician, so 

that all electrical wiring will conform to your local standards.

4. For maximum safety, make sure cooler cabinet is properly 

grounded to a suitable ground connection.

5. Cooler must be connected to proper line current, voltage and 

cycle, as stamped on cooler motor and pump motor specifi cation 
plate.

6. Do not allow pump to tip over and become submerged.
7. Always TURN OFF POWER before performing any mainte-

nance.

For the best cooling performance, if the pads are dry, pre-wet the pads 
by running the pump for a few minutes before starting the blower.

These coolers may also be used without water for ventilation purposes.  
When outside air is cool (for example, at night) or when humidity is 
high the water pump can be turned off.

Important:  To cool effi ciently, you must exhaust the stale or used air 
from the building.  Open windows or doors or use exhaust fans located 
away from the cooler and in the direction you wish to cool the air.  The 
air will fl ow in the direction of the exhaust openings.  A common guide 
for the amount of exhaust opening needed is to have at least 2 square 
feet of opening per 1000 CFM.

CAUTION:  Make sure that the mounting surface is strong 

CAUTION:  Do not start cooler until installation is complete 

CAUTION:  Make sure all bolts are securely tightened before 

• Wet sections.  The wet sections are bolted to the blower section using 

the connector brackets, lift brackets and bolts provided.  Match the 
colored dots on the wet section to the appropriate dot on the blower 
section to insure correct installation.

• Ductwork.  See the General Specifi cation table for dimensions of 

duct opening.  For down discharge units, the duct must go inside 
the opening.  Size these ducts slightly smaller than the duct opening 
in the cooler.  The side and up discharge units have a 1 inch fl ange.  
Size these ducts larger than the duct opening to fi t over the fl ange of 
these units.

•  Motor mounting.  Slide the 

heads of the provided carriage 
bolts into the slots of the ad-
justable channels.  Slide these 
channels sideways in the slotted 
holes to align with the holes in 
the motor base and to align the 
motor shaft with the blower 
pulley.  Mount the motor to the 

•  Overfl ow assembly.  Remove nut and place nipple through the hole 

in the pan, with the rubber washer between the pan and the head of 
the drain nipple (Fig. 4).  Screw on  nut 
and draw up tight against bottom of pan.  
Insert overfl ow pipe in nipple to retain 
water.  Overfl ow pipe may be removed 
to drain pan when necessary.  A garden 
hose may be screwed on the drain nipple 
to drain water away from your unit.

•  Pump.  The pump must be secured to prevent it form tipping over.  

Secure the pump to the pump mounting bracket (item 16 in parts 
drawing). Remove a nut located under the head of the pump, place the 
pump bolt though the hole in the mounting bracket, and secure with 
the nut that was previously removed.  Plug pump into receptacles.  
Retain pump cords to internal braces to prevent cords from dropping 
into water reservoirs or contacting moving components.

•  Supply water.  Run a water supply line to the unit.  Each wet section 

requires a 3/8 inch tube connection to the fl oat valve.  The double 
inlet units will have two fl oat valves, one for each wet section.  Note:  
Do not use water supplied from a water softener.

•  Float valve.  Refer to Fig. 5 to install fl oat.  Remove items 1, 2, 

3, and 4.  Insert fl oat body (5) through hole in splash plate (9) and 
back post panel as shown.  Install washer (1) and nut (2).  Tighten to 

motor mount using these carriage bolts 
and the washers and nuts provided 
(see Fig. 1).  Make sure all bolts are 
securely tightened.

•  Motor pulley.  Install the motor pulley 

so that it aligns with the blower pulley 
(see Fig. 2) and tighten set screw.  See 
page 3 for instructions on adjusting pulley.

NOTE:  Local building code regulations must be observed.

WARNING:  Disconnect all electrical services that are used for 

•  Electrical supply.  Cooler must be supplied with the proper line 

current, voltage and frequency, as stamped on blower motor and 
pump motor specifi cation plate.  See the wiring diagrams on page 
4 for typical electrical connections.  Note:  Connecting improper 
voltage to motor will void motor warranty.

•  Wire sizing.  The conductor sizes are to be determined by motor 

loads and length of run per national and local electrical codes.

•  Switches or contactors.  Motors  require switches or contactors of 

proper current capacity and should be sized and installed by a quali-
fi ed electrician.

•  Wiring.  The electrical junction box 

is located in the upper inside of the 
divider channel.  Remove the two 
screws and pull the box out from the 
channel to access wiring (Fig. 3).  
Connect the pump supply wiring to 
the pump receptacles (See the pump 
wiring diagrams on the next page).  
Connect the motor supply wiring 
directly  to the blower motor.

WARNING:  Make sure that cooler cabinet is properly grounded 

Fig. 1

Blower 

Housing

Motor 
Pulley

Blower 
Pulley

Fig. 2

Screws

Junction Box

Fig. 3

Rubber Washer

Overfl ow Pipe

Nipple

Bottom Pan

Nut

Fig. 4