Installation Guide

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Time Delay Operation (Timer Mode)
Delayed start or nish in ‘Auto’ or ‘Manual’ mode.
The ‘Timer’ button is used to set a delay period between 1 and 12 hours in 1 hour increments.
If the cooler is operating (in ‘Auto’ or ‘Manual’ modes) when the ‘Timer’ button is pressed, the delay period determines when the
cooler switches o. If the cooler is O when the ‘Timer’ button is pressed, the delay period determines when the cooler starts in
‘Auto’ mode. The set temperature will be the last setting when running in ‘Auto’ mode.
‘Timer Delay’ and the remaining time are displayed on the LCD while the timer feature is activated.
You can cancel the Timer function at any time by pressing the ‘Timer’ button. The ‘Timer Delay’ indicator will no longer be
displayed.
In The Event Of A Power Outage
When power is restored after a power outage, the thermostat will resume operation in the mode selected prior to the power outage.
If the timer mode is active, the time will be restored to the hour indicated prior to the outage.
AIR EXHAUST
For an evaporative cooler to be eective, 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 ow, allow an opening of at least 2 square feet (288 square inches) for each 1000 CFM rating of your unit.
Example: At 3640 CFM, model 4000RLD4 requires 7.3 square feet (1050 square inches) of opening (3320/1000 * 2 = 7.3).
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 7.3 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.