Hired-Hand Polar Cool: Portable Evaporative Cooling System - Manual (Page 11)

Manual No. 4801-5035 Rev 8-07 PolarCool Page 11 of 22
7.3.4 Why Drain Water From The System?
If you have ever left a pot of coffee warming on the coffee maker you know the two principles at work in
evaporative cooling systems. First, as the coffee sits on the warming plate, the level of water in the pot goes down.
Second, the remaining coffee gets stronger as the water evaporates.
In your cooling system, these effects still apply. As water evaporates, no impurities are carried along. This leaves
all sorts of minerals, chemicals, and other impurities behind. The concentration of impurities in the reservoir and
system will quickly rise.
Drain the reservoir daily in dusty conditions, and twice a week in clean air.
7.3.5 Water Distribution
Maintaining even water distribution to the pads is the most important way of extending pad life. If an area of pad
does not receive enough water, cooling efficiency will be degraded. The Spray Bar Adjustment Valve (18”, 24”,
36”, and 48” models) should be increased until the pads are fully wet, but not to the extent that a mist is blown out
of the fan.
Note: The 18” model’s Spray Bar Adjustment Valve is located inside the unit on the lower-side of the water pump.
Dry spots or streaks can also be caused by clogged holes in the spray bar. Investigate by raising the rear cover and
running a pipe cleaner, or small dowel into the holes in the spray bar to clear any clogged holes. The spray bar end
cap or caps may be removed for easier cleaning. Ensure the holes in the spray bar point upward during operation.
7.4 Flushing the Reservoir
The pads and the complete water system should be flushed out at least once a week and the reservoir wiped clean.
1. Turn off the pump, fan, and water source, unplug the unit and drain the reservoir. The reservoir can be drained
using the Drain Outlet, or for 24, 36, and 48 inch models, the Discharge Valve and pump can be used to remove
water.
NOTE: If desired, an optional customer supplied drain hose and cut-off valve can be attached to the drain pan
outlet beneath the PolarCool.
2. Wipe out the reservoir.
NOTE: Do not allow the pump to run without water in the reservoir. Without water, the pump may be damaged.
3. Restore the water source and fill the reservoir.
4. Run the pump for at least 15 minutes.
5. Pump the reservoir out again and refill with fresh water.
6. Start the pump and fan.
Drain Outlet w/Cap
18 inch PolarCool Model Shown