12
OPT-AS3,4,5,8 (07-22) 160202-B
MAINTENANCE
Filling and Adjusting Water Level in Reservoir
Fill and adjust the reservoir water level on cooling modules equipped with pump and float controls only—does not
apply to modules with AquaSaver timed controls.
1. Turn on water supply and check for good flow.
2. When float valve shuts OFF water supply, measure water depth—should be approximately 3 inches.
3. If it is necessary to adjust float valve to obtain proper water level or to free float valve from obstructions, carefully
bend float valve rod (see
) upward to raise water level or downward to lower water level.
4. While reservoir is full, check for any water leaks. Reservoir was tested, but if any small leaks are present, drain
reservoir and apply waterproof silicone sealer around corners and welds.
Adjusting Water Flow
⚠ DANGER ⚠
Adjust the ball valve only when power is disconnected from the unit. Failure to do so can cause
electrical shock, personal injury, or death.
⚠ CAUTION ⚠
Do not flood the media pads with extreme quantities of water for long periods as this will cause
premature breakdown of the media. An even flow from top to bottom of the media with the least
amount of water is all that is required to assure maximum efficiency and media life span. More
water does not provide more evaporation or more cooling. Proper water flow over the evaporative
cooling media is critical to extend the life and maintain the efficiency of the pads.
Adjust Water Flow with Float and Pump Control System
1. Adjust ball valve (see
Figure 13
) located in water line from pump to sprinkler pipe inlet to allow water flow to
completely dampen media pads from top to bottom.
2. Operate unit and observe water flow. After 15 minutes with blower in operation, water should have completely
dampened pads but should not be flowing off entering side of media.
3. If water is flowing off entering side of media, turn system off, disconnect power, and adjust ball valve to reduce
entering water flow.
Figure 13. Ball Valve
BALL
VALVE