PolarCool 48″ PolarCool™ Fan - Manual (Page 5)

Manual No. 4801-5035 Rev 2-09 PolarCool Page 5 of 26
4. Controls
New for 2008, the 18” and 36” Variable Speed PolarCool units feature a completely redesigned control panel
interface. The new control panel provides a user friendly interface with status indicator lights.
The 24” and 48” PolarCool models have two valves and two switches. Their functions are as follows:
4.1 Valves
• Discharge Valve (24” and 48” models only) – Used when pumping out the reservoir for cleaning and
extended shutdown (Down time greater than 24 hours). Also used to implement the “bleed-off” function.
Connect a hose to this valve when pumping out the system or implementing “bleed-off” to prevent dangerous
water puddling around the fan.
• Spray Bar Adjustment Valve (18”, 24”, 36”, and 48” models) – Used to adjust the water flow to the spray bar.
The valve can be opened or closed to increase or decrease the water flow to the pads. Too much water can
allow droplets or a mist to be blown out of the fan. Too little water will prevent thorough wetting of the pads
and will result in a reduction in cooling efficiency.
4.2 18” and 36” Variable Speed Control Panel
• Power Indicator Light – The red Power Indicator Light is located at the bottom-center of the control panel
label and illuminates the Danger High Voltage Triangle. The Power Indicator Light remains ON constantly
while power is applied to the PolarCool unit.
• Fan Control ON/OFF Button – This button is used to start and stop the fan.
• + and – Speed Control Buttons – Used to select the fan speed to any position between LO and HI. These
buttons control the fan speed only and does not turn the fan on or off..
• Water Pump Control ON/OFF Button – This button is used to start and stop the water pump.
Caution: This switch should never be turned on unless there is water in the pan.
• Pump ON – The green indicator PUMP ON light is ON solid when the water pump is running.
• Low Water – The red indicator LOW WATER light is ON blinking when the water level is low for less than 1
minute. After the first minute, the red indicator light is ON solid.
• Fill – The green indicator FILL light turns ON blinking when the water level has remained low for a constant
time of more than 1 minute. Also after the first minute of constant low water level, the water pump will
automatically turn off, the Pump ON and Fill green indicator lights will be blinking, and the Low Water red
indicator light will be ON solid.
NOTE: The water must be filled above the low level switch and remain above the switch for a minimum of 1
minute solid before the water pump will turn back On.