WPL44/ WPL44NP MasterCool® Mirage Window Evaporative Cooler
USER SERVICING INSTRUCTIONS
Maintenance on evaporative coolers is minimal, but very important to the proper operation and effectiveness
of your cooler. Periodic inspection of the cooler's interior will reduce the potential for substandard cooling
due to insufficient or uneven water distribution.
NOTE: For general maintenance purposes, the unit may be rapidly drained of water by removing the overflow
fitting from the bottom of the unit. This is not adequate draining for winterization (see procedures under
Winterization section.)
Annual Maintenance (May be Needed More Often in Areas with Hard Water)
Cleaning
WARNING: Disconnect from electrical power and turn unit off during all maintenance. Turn water supply off
before removing back for cleaning or maintenance.
1. Remove the back media guard (as shown below).
2. Inspect pads in place. Remove media pads from back guard by unscrewing the media peg
clips. Be careful not to chip or damage the media while removing. Visually inspect both
sides of media pads. Look for blockage, mineral build‐up or mildew growth, breakage
or other anomalies.
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