Hired-Hand Polar Cool: Portable Evaporative Cooling System - Manual (Page 5)

Manual No. 4801-5035 Rev 8-07 PolarCool Page 5 of 22
4. Controls
There are two valves and two switches on the PolarCool. Their functions are as follows:
4.1 Valves
• Discharge Valve (24”, 36”, 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.
Note: The 18" model’s Spray Bar Adjustment Valve is located inside the unit on the lower-side of the water
pump.
4.2 Switches
• Fan Control Switch – Used to start and stop the fan. This switch is the one on the left when looking at the bank
of switches. Note: Some models come with two speed and others with variable speed fans. Refer to the figure
below for available models and fan speeds. These models will have a two position switch to turn the fan On
and Off (36" and 48" SS Models) or a two position On/Off switch with a variable speed knob (18", 24", and
36" VS Models).
• Pump Control Switch – Used to start and stop the pump, and is located on the right when looking at the bank
of switches. Caution: This switch should never be turned on unless there is water in the sump.
• Speed Control Knob – Used to select the fan speed to any position between Low and High (18", 24", and 36"
VS Models). This knob controls the fan speed only and does not turn the fan on or off.
4501-0214
FAN
CONTROL
PUMP
CONTROL
ON ON
OFF OFF
4501-6085
18", 24" & 36" VS Models
Variable Speed Fan Knob
36" and 48" SS Models
Single Speed Fan Toggle Switch