(Mar, 2012)
Compact CWE Series Installation, Operation & Maintenance Manual
Air Technology Systems, Inc.
1-1
1.0
INTRODUCTION
1.1 General
The
Compact CWE™
fl oor mounted, precision
air conditioning system covered by this manual is
designed and manufactured by Stulz Air Technology
Systems, Inc. (SATS) and uses the latest, state-of-
the-art control technology. Recognized as a world
leader, SATS provides air conditioning systems with
the highest quality craftsmanship using the fi n-
est materials available in the industry. The unit will
provide years of trouble free service if installed and
maintained in accordance with this manual. Damage
to the unit from improper installation, operation or
maintenance is not covered by the warranty.
STUDY the instructions contained in this manual.
They must be followed to avoid diffi culties. Spare
parts are available from SATS to insure continuous
operation. Using substitute parts or bypassing
electrical or cooling components in order to continue
operation is not recommended and will VOID THE
WARRANTY. Due to technological advancements,
components are subject to change without notice.
Compact CWE
systems are designed to be installed
indoors unless otherwise noted on the equipment.
1.2 Product Description
Compact CWE
systems are designed to be the most
versatile and fl exible fl oor mounted air condition-
ing systems in the industry.
Compact CWE
units are
available in upfl ow or down fl ow air confi gurations and
utilize highly effi cient, electronically commutated (EC)
fans. The cooling capacity, in kW, will depend on the
unit size which can range from 30 to 360 kW. (1 kW =
3415 BTU/Hr). Refer to the unit nameplate to identify
the model number and cooling capacity of your unit.
Compact CWE
systems operate with an external
source of chilled water. The chilled water system is
a closed loop circuit in which cold water is circulated
through a chilled water coil. On demand for cooling,
the microprocessor controller begins modulating the
chilled water valve open. Chilled water fl ows to the
coil at a rate that varies proportionally to the amount
of cooling required. The controller modulates the
valve opening together with the fan speed to meet
the user selectable temperature setpoint. Heat from
the surrounding air is transferred through the fi nned
tubing of the coil into the cold water. Water is then re-
circulated back to the cold water source.
Compact CWE
systems are designed to supply air to
only one room.
NOTE
Compact CWE
systems are strictly for non-
residential applications.
The functional modes of operation, in addition to
cooling, are heating, humidifi cation, dehumidifi cation
and fi ltration which provide complete environmental
control of a conditioned space.
There are two air fl ow pattern confi gurations, upfl ow
and downfl ow, and several cabinet sizes based
on the type of system and capacity. Regardless of
confi guration,
Compact CWE
systems are compact
and versatile. See the Installation drawing provided
with your unit for the layout and dimensions of the
cabinet.
The
Compact CWE
unit is provided with a factory
mounted, main power disconnect switch with a
lockable handle. The disconnect switch electrically
isolates the unit during routine maintenance. The
system incorporates state of the art component
protection with the use of motor start protectors or
circuit breakers.
The advanced
E
² microprocessor controller is
provided as a standard for
Compact CWE
systems.
This controller provides superior features for more
comprehensive control of the unit. These features
include: full alarm system; input/output monitoring
status; full integrated control of heating, cooling,
humidifi cation, and dehumidifi cation; multi-A/C unit
control and remote communication with building man-
agement systems.
The controller user interface display panel is typically
mounted on the front door of the A/C unit. It features
a high resolution touch screen display offering
enhanced graphical display capabilities and a round
membrane type keypad to navigate through the
controller menus and adjust operating parameters.
An easy to read, backlit liquid-crystal alphanumeric
display panel is also available as an option.
An operating manual for the
E
² controller is provided
under separate cover. Refer to that manual for
detailed instructions on operating the system
controller.
Touch Screen Display Liquid-Crystal Display
