Hired-Hand Mega-Cool rev 4-08 - Manual (Page 3)

Part No. 4801-5093 Rev 4-08 Unitized System Page 3
Tools Required
PVC piping
glue PVC piping
cutter
Circular Saw
Level Chalk Line Hammer
Wrench Cordless drill with 1/4
″
nut driver
Purpose of Evaporative Cooling
Evaporative cooling is a time tested efficient means of reducing air
temperature by drawing incoming air across a wetted surface. Evaporative
cooling is especially useful in situations where air inside the space is not re-
circulated. The efficiency and the cooling ability evaporative cooling
possesses make evaporative cooling a wise choice for agricultural and
horticultural structures.
Theory
Evaporative cooling needs only two factors to work: water, and moving air.
When air is moved across a wet surface, some of the water on the surface
evaporates. This action draws heat from the moving air, cooling, and
humidifying the incoming air.
Description of Unitized System
The Unitized System combines the RollSeal
®
side wall curtain with an
evaporative cooling cell. The side wall curtain component is a motorized
curtain enclosure for the side of an agriculture or horticulture structure that
can regulate ventilation when connected to an automatic controller. The
evaporative cooling component is a row of evaporative cooling pads and
water that cools incoming air. In the unitized system, these components
mount in front of a single opening. This gives a system for regulating both
temperature and ventilation of a building. Since only one wall opening is
required for each system, this increases the efficiency and lowers operating
costs. The unitized system may be divided into individual groupings.
These groupings are defined by their collective purposes: curtain, reservoir,
fill line, pump kit, supply line, spray line, and pads.
Curtain The complete side wall curtain assembly consists of adjacent
side wall curtain systems. Each system frames an opening and
provides a mount for supporting a drive pipe to which the
curtains are attached.
Reservoir The reservoir serves a dual purpose. It holds the water supply
for the pump, and collects the water returning from the pads.
It consists of eight inch (20.3 cm) diameter PVC piping.
Fill line The fill line supplies make-up water to the system.
Pump Kit The pump kit includes the pump, shutoff valves, bleed off line,
and strainer. This section provides the force for moving water
from the reservoir to the supply line.
Supply line The supply line carries water from the pump kit to the spray
line. This section is made of one and a half inch (3.8 cm) PVC
piping and various fittings.
Spray line The spray line is constructed of 1-1/4 inch diameter PVC pipe
with holes drilled in the line along the top. These holes are
drilled a certain distance apart depending on the size of pad
installed. When water is pumped to the spray line, water
shoots out the holes onto the distribution plate then drops into
the pads.
Pads Constructed of cellulose fibers formed into corrugated blocks.
When water flows down the system, and air is drawn through
the pads, the air evaporates some of the water, becoming much
cooler. When the water reaches the bottom of the pads, it
drips back into the reservoir.