PolarCool 48″ PolarCool™ Fan - Manual (Page 15)

Manual No. 4801-5035 Rev 2-09 PolarCool Page 15 of 26
8. Repeat steps 1 thru 7 above as
required for proper adjustment of
water level. NOTE: Water level in
reservoir is normally 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 (2007
models and earlier) on the bottom of the pump as shown in
Section 7.5 and also at the Flow Control Valve as shown to the
right. The 36
″ model has a flow control valve as shown to 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. The FULL
OPEN and CLOSED
positions of the Valve are
shown in figures at the right.
Valve
Closed
Valve
Full Open
Decrease
Pressure
Increase
Pressure
Adjust Water Flow
18", 24", 36" & 48"
PolarCool
Flow Control Adjustment
18", 24", 36" & 48" PolarCool
Flow
Control
Valve
Pump