Part No. 4801-5120 Rev. 1-2020
Mega-Cool System
Page 41 of 48
For example: If your pad is five feet tall and 60 feet long, and your air speed is
300 feet per minute. Outside temperature is 95 degrees, and inside temperature
is 75 degrees, you would give 3.6 gallons per minute.
If water is extremely hard – large amounts of minerals, etc. – then the bleed off
rate should equal evaporation.
If minerals are a small problem, make the bleed off rate equal to from ¼ to ½ of
the evaporation rate.
For areas with little or no dissolved solids, make the bleed off anywhere from
one tenth to one fourth the evaporation rate.
These values are estimates, so individual rates will vary. Try to keep your water
as clean as possible to minimize scale formation on the pads.
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, it will clog
or soften. If at any time you see dry spots or streaks, investigate to see why.
Most problems associated with water distribution may be fixed with a good
cleaning of the spray line. Follow procedures outlined below for cleaning the
Mega-Cool System. For best results clean the system on a regular basis.
Cumberland Mega-Cool Checklist
Have the right amount of water running over the pad.
Identify and correct leaks in the system.
Reduce the amount of on-off cycles.
Excessive dust, fumes and harsh cleaners, should be avoided.
Disinfect the whole system once per quarter.
Have the sump and pad in the shade if possible.
Allow the pads to dry completely every 24 hours.
Never use phosphate based water treatment chemicals.
Drain the system during extended shutdowns.
Cleaning Mega-Cool System
1. Shut off Pump and clean strainer.
To clean in-line filter: (a) close ball valve between filter and reservoir; (b)
unscrew filter - dump out water; (c) replace filter; (d) open ball valve.
2. If possible, turn off fans. (If this is not possible, run fans at minimum
levels).
3. Gently hose off pads. Clean algae from pads and pipes.
4. Flush reservoir: (a) Close ball valve between Pump and 1" dia. exhaust . (b)
Open 1" dia. exhaust valve. (c) Turn on Pump. (d) Allow reservoir to flush
for several minutes. NOTE: Fresh water will be added to reservoir by fill
line as system flushes.
5. After flushing reservoir: (a) Turn off Pump. (b) Open ball valve between
exhaust and union fitting. (c) Close exhaust valve.
6. Flush spray line: (a) Open ball valve at end of spray line. (b) Turn on
Pump. (c) Flush for several minutes.
7. Disconnect union at end of spray line.
8. Insert brush into spray line. Brush out debris from spray line.
9. Reconnect union.
10. After flushing spray line: Turn off Pump. Close ball valve at end of spray
line.
11. Refill reservoir to full level.
12. Resume normal operation.
Winterizing Mega-Cool System
If the system will not be operating for extended periods, follow the Cleaning instructions 1 through 9 in the previous section. Do not refill the system with water. Ensure
that pumps are not submerged in water! For exposed metal parts, cover with a light coat of Spray Lubricant.
