AdobeAir MD524, MD628, UD960, US960, US980 User Manual

INDUSTRIAL DIRECT AND INDIRECT/DIRECT EVAPORATIVE COOLING

Engineer designed to satisfy your design requirements.

Modular Components

• Air Handling Modules in side, down or up
discharge and single or dual inlet design.

• Evaporative Media Modules with standard 8” or
Hi-Performance 12” media.

• Indirect Cooling Modules for added cooling
with no moisture added (optional).

Durable Construction

• Galvanized steel with our exclusive
POLYBOND® polyester epoxy powder
based coating ensures years of dependable
service.

Effi ciency

• Choice of media modules allows cooling
effi ciencies tailored to your design
requirements.

Cost Effectiveness

• Competitive fi rst cost combined with substantial
energy savings over refrigerated air units results in
quick payback. Plus, the simplicity of design allows
low maintenance requirements.

Other Features

• Precision balanced blower wheel.

• Solid shaft for rugged durability.

• AdobeAir motors and pumps are U.L. Recognized.

• City of Los Angeles (C.O.L.A.) approved.

• AMCA Licensed ratings

• U.L. Classifi ed

• U.L. Listed

Dual Inlet

Models MD628, MS628, and MU628 U.L. Classified

Shown with 12” media modules DM120

Models UD980 and US980 U.L. Listed

Shown with 12” media modules UM120

AdobeAir, Inc. certifies that the evaporative air cooling products
shown herein are licensed to bear the AMCA Seal. The ratings
shown are based on tests and procedures performed in
accordance with AMCA Publication 211 and comply with the
requirements of the AMCA Certified Ratings Program.

Single Inlet

Models MD524 and MS524 U.L. Classified

Shown with 12” media modules DM080

Models UD960 and US960 U.L. Listed

Shown with 12” media modules UM080

SINGLE-STAGE INDUSTRIAL EVAPORATIVE COOLING

Direct Evaporative Cooling Process

Direct evaporative cooling exchanges sensible heat for latent heat,
and follows upward along a constant wet-bulb temperature line on the
Psychrometric
Chart. The result
is a dry-bulb
temperature of
the leaving air
(B) approaching
the wet-bulb
temperature of the
entering air (A).

Standard and Hi-Performance Models

The fl exibility of modular components allows selection of CFM and
saturation effi ciencies producing the sensible heat capacities needed to
meet design requirements. For
many applications, our standard
8” media continues to be an
economical choice, with an 80%
saturation effi ciency at 450 FPM.
For more demanding design
conditions, our 12” media offers
90% effi ciency at around 450
FPM.

MasterCool Evaporative Media

MasterCool evaporative media is constructed
of special cellulose material, impregnated with
insoluble anti-rot salts and rigidifying saturants.
The cross-fl uted design continually directs
water to the air-entering side, inducing a highly
turbulent mixing of air and water for optimum
heat and moisture transfer.

Direct Evaporative Cooling

Put simply, whenever water is evaporated, heat
is absorbed. This basic principle underlies the design
of the MasterCool direct evaporative cooler.

High Quality Construction

Hot-dipped galvanized steel, welded for maximum
strength is combined with our exclusive POLYBOND®
fi nish that protects the whole system – cabinet
pans, distributor covers, louvers, and all other parts
contacting water. The electrostatically applied
polyester epoxy powder-based coating is cured at high
temperature and is so durable that these models are
backed by the best warranty in the industry.

Energy Efficient...
Environmentally Friendly

With no compressors or condensors, MasterCool
evaporative coolers offer signifi cant energy savings
over mechanical refrigeration units; and, with no
CFC’s, do not contribute to depletion of the ozone
layer. Their air washing effect improves indoor air
quality with fresh, fi ltered air constantly brought into
the cooled space...forcing stale air out.

Comfort Levels

Not only does evaporative cooling lower the temperature
in the space to be cooled, it also lowers the temperature
you feel. Rapid air movement produced by the
MasterCool increases skin evaporation which causes you
to feel 3-5° effectively cooler than the temperature read
from a thermometer. Evaporative cooling can provide
effective temperatures acceptable in most commercial/
industrial applications throughout the world.

Typical Applications

The Industrial MasterCool is used for area cooling or
spot cooling. In many areas it can replace or supplement
mechanical refrigeration needs in agricultural,
institutional, commercial, and industrial applications.
Applications such as kitchens, laundries, gymnasiums,
heat treating areas, and dry cleaning plants requiring
large quantities of fresh air moving through the building
are ideal candidates for evaporative cooling.

2-STAGE INDUSTRIAL EVAPORATIVE COOLING

Indirect/Direct Evaporative Cooling Process

In the indirect cooling stage, entering air is cooled along a horizontal
humidity ratio line on the Psychrometric Chart (A to B) without adding
moisture. In the next cooling stage, this air is further cooled along a new
wet-bulb line (B
to C), resulting in
a lower dry-bulb
temperature of
leaving air than
can be achieved
with single stage
direct evaporative
cooling alone.

Typical Confi gurations

Many confi gurations of 2-Stage Industrial MasterCool are possible.
Typical fi eld-assembled components include 2 or 3 Indirect Cooling
Modules with Models MD/MS524 and 4 or 6 ICM’s with models MD/MS/

MU628 Contact your
local MasterCool
representative for
assistance in sizing.

Models shown with
three ICM’s at each
inlet location.

The Indirect Cooling Module

Outside air is drawn into the ICM. A fan
draws air through the inside of vertical fi ns
(which have water running inside them). The
air picks up heat and is expelled from the
ICM while the fi ns are cooled by evaporation.
Other outside air is drawn across the outside
surfaces of the cooled fi ns, and is cooled
without coming in contact with water. This
cooled air, with no humidity added, then
enters the direct evaporative section of the
Industrial MasterCool for fi nal cooling.

2-Stage Indirect/Direct
Evaporative Cooling

2-Stage cooling allows you to use energy-saving
evaporative cooling technology for design conditions
where direct evaporative cooling alone is not adequate.
A 2-stage cooler results in greater cooling power, less
affected by higher ambient temperature and humidity.

In the indirect cooling stage, outside entering air
is cooled sensibly reducing its total enthalpy. This
“precooled” air is then evaporatively cooled in the direct
cooling stage, approaching its new, lower
wet-bulb temperature.

The end result is discharge temperatures near or
even slightly below the wet-bulb temperature.
More importantly, these lower discharge temperatures
translate into customer comfort at a fraction of the cost
of refrigerated air conditioning.

Applications

With its substantial increase in cooling capacity, the
indirect/direct 2-stage Industrial MasterCool can replace
mechanical refrigeration in many applications.

KoolKalk...
Computer Aided Sizing

The sizing method described in this brochure can be used
for general sizing of direct evaporative Industrial MasterCool
units.

For more accurate sizing, and for sizing indirect/direct units,
we recommend the use of KoolKalk... an IBM compatible
computer program designed specifi cally for AdobeAir
Evaporative Coolers. For more information please visit the
AdobeAir, Inc. website at www.AdobeAir.com.