Essick Air AS20012 - Manual (Page 4)

MASTERCOOL COOLERS ARE MADE BY THE
BEST: CHAMPION COOLER
One of the largest manufacturers of evaporative coolers, Champion
Cooler has produced evaporative coolers that deliver high
performance results and long-lasting durability for over 40 years.
Champion’s engineering, design, and production efforts are directed
at the continued manufacture of products that deliver maximum
performance with minimum maintenance.
The performance or Sensible Heat Capacity of any evaporative cooler is
a function of both the CFM and the efficiency, which should be considered
as part of the sizing process. To help ensure proper sizing of a MasterCool,
use the Index on the following page to locate Performance Data and Sizing
Tables for a specific MasterCool model. Follow the procedure below to
determine the cooler size.
1. Determine design conditions.
• Outside Dry-Bulb
• Outside Wet-Bulb
• Inside Dry-Bulb (TI)
2. Determine the design Sensible
Heat Load (Btuh).
3. Determine the cooler leaving air
temperature (LAT) from the tables.
EXAMPLE
• Outside Dry-Bulb = 105
• Outside Wet-Bulb = 65
• Inside Dry-Bulb = 80
Determine the number of AD100 MasterCool coolers with 2 horsepower
motors required to cool 125,000 Btuh heat load. Assume .5" (water) external
static pressure.
Using the Sizing Tables, the following information should be calculated:
LAT = 72
CFM = 7368
SHC = 1.08(80-72)7368 = 63,660 Btuh
Number of Coolers = 125,000/63,660 = 2
4. Determine CFM from the
performance tables.
5. Calculate Sensible Heat
Capacity of cooler using:
SHC =1.08(TI-LAT)CFM
6. Determine the number of
coolers by dividing the
Sensible Heat Load by the
Sensible Heat Capacity.
NSTRUCTIONS IZING