Use and Care Guide
110498-2
5
AMPERAGE DRAW AND BELT TENSION (CONT)
1. Ensure electrical connection of unit is complete and in accordance with
all safety standards and local requirements.
2. Reinstall inspection panels. Apply power, turn water and pump on and
allow cooler to run for a few minutes to wet pads.
3. Check amperage and verify it conforms to amperage listed on the
specifi cation label on motor.
• If amperage draw is less than motor rating, turn off electrical power
and remove inspection panels. Unplug motor inside cooler, this will
protect you from someone turning on unit while you are working
inside. This should be done for your safety. Adjust pulley to a larger
diameter and readjust belt tension. Plug motor in,
install inspection panels, and retest amperage draw.
Repeat this process until correct amperage draw is
attained.
Note: Increasing motor pulley diameter increases
amperage draw. Decreasing motor pulley diameter
decreases amperage draw.
CAUTION: DO NOT operate cooler with larger
amperage draw than specifi ed on motor plate. Motor
damage will occur.
4. Check belt tension after adjusting pulley. A 3 lb. force
should defl ect the belt 3/4 inches. Readjust belt if
needed by loosening adjustment screw, rotate motor
until you have the correct belt tension, then re-tighten
screw.
OPERATION
NOTES: These coolers may 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.
To eliminate the delivery of hot air when starting the cooler, start the pump only for the fi rst few minutes, then turn on the
blower motor.
For an evaporative cooler to be effective, there needs to be adequate exhaust. If there is not adequate exhaust, pressure and
humidity will build up in the building. You exhaust by opening doors or windows to allow the old stale air in the building to escape.
Attic exhaust dampers may also be installed to exhaust the air into the attic. The combination of attic exhaust dampers and a
thermostat can provide a completely automatic operation.
An often misunderstood concept of evaporative cooling is the amount of air that should be exhausted. How much should you open
your windows? The following two methods will help you determine the amount to open your windows.
WINDOW AREA/CFM METHOD
For proper air fl ow, allow an opening of at least 2 square feet (288 square inches) for each 1000 CFM rating of your unit.
Example: At 3320 CFM, model ADA 51 (1/2 hp) requires 6.6 square feet (950 square inches) of opening (3320/1000 * 2 =
6.6).
Multiply the number of windows by window width in inches and divide this into the number of square inches required for your size
unit. This will give you the height to open windows. In this example, four 36 inch wide windows should be opened 6.6 inches each.
TISSUE SUCTION METHOD
1. Take a piece of tissue paper and cut it lengthwise into 3 equal strips.
2. Turn your cooler on high cool.
3. Open one window at least six inches wide in each room that you want to cool.
4. Take the piece of tissue paper and put it up against the screen of the open window furthest from the cooler discharge
opening. Let go of it. It will do one of three things.
IF: It falls down. THEN: CLOSE all of the windows one inch and try step 4 again.
IF: It plasters itself to the screen. THEN: OPEN all of the windows one inch and try step 4 again.
IF: It stays on the screen lightly. THEN: PERFECT. You are done. Enjoy your cooler.
Notes:
• When switching to low cool, you must re-balance your home. Repeat step 4.
• Once you balance your home you can cool some areas more than others by opening those windows
more and closing the others by the same amount. Repeat step 4 to make sure your home is still air balanced.
Decrease
Amperage
Motor
Motor
Pulley
Blower
Pulley
Belt
Adjustment
Screw
3 Lb. Pressure
3/4 Inches
BELT TENSION