Hired-Hand Polar Cool: Portable Evaporative Cooling System - Manual (Page 14)

Manual No. 4801-5035 Rev 8-07 PolarCool Page 14 of 22
8. Repeat steps 1 thru 7 above as
required for proper adjustment of
water level. NOTE: Water
level in reservoir is normally ca. 2-
1/4"
± 1". Do not allow the
reservoir water to contact the pads
when the reservoir water level is at
the highest point.
9. After adjusting water level, return
PolarCool to service.
7.11 Flow Control Adjustment
Flow control adjustments are available on the 18
″ model on the
bottom of the pulp. The 36
″ model has a flow control valve as
shown at the right. Flow adjustments are factory preset, however
can be adjusted by the user based upon local water pressure and
evaporative conditions at the site. The amount of water flow
affects the efficiency and operation of the PolarCool. During
operation the flow should be adjusted so that sufficient water
soaks the pads, but only enough to completely soak the pads.
If there is too much water flow, the pads become over-soaked,
that is, there is more water flow than required for proper
evaporation. Surplus water may be sucked into the fan producing
a water droplet spray directly in front of the PolarCool. I some
cases, if you stand in front of the PolarCool you may feel the
water spray! The efficiency of the Polar cool is reduced in this
case. If this happens, reduce the water flow.
If there is too little flow, there will not enough water to fully soak the pads. You can actually see dry spots in
the pads. Again, this reduces the efficiency of the PolarCool. If this is the case, increase the flow until the pads
become fully soaked.
Adjust the Water Flow as
described above for the 36
″
PolarCool. The FULL OPEN
and CLOSED positions of the
Valve are shown in figures at
the right.
Flow Control Adjustment
36
″ PolarCool
Pump
Flow
Control
Valve
Valve
Closed
Valve
Full Open
Decrease
Pressure
Increase
Pressure
Adjust Water Flow
36 PolarCool