•Machine room cooling requirements associated with
•High noise levels common with air- cooled motors, which radiate noise to the machine room and adjacent areas.
•Shaft alignment problems that occur with
Positive pressure design — Posi- tive pressure designs eliminate the need for costly low pressure contain- ment devices, reducing the initial cost of the system. The Evergreen® 23XRV chiller’s positive pressure design en- sures that air, moisture and other per- formance degrading contaminants are not sucked inside the chiller. Purge units and their associated mainte- nance are no longer necessary.
Optional refrigerant isolation valves — The optional refrigerant isolation valves allow the refrigerant to be stored inside the chiller during shipment from the factory, minimizing
Optional pumpdown unit — Com- bined with the refrigerant isolation valves listed above, the optional pump- down unit eliminates complex connec- tions to portable transfer systems, thereby reducing service costs. The op- tional pumpdown compressor meets Environmental Protection Agency’s (EPA) vacuum level requirements that mandate minimizing refrigerant emis- sions during service.
Modular construction — The cool- er, condenser, and compressor assem- blies are bolted together, making Ever- green 23XRV chillers ideally suited for replacement jobs where ease of disas- sembly and reassembly at the jobsite are essential.
Single point power — The 23XRV chiller features internal control power transformers to provide low voltage power (115 v and 24 vdc) for machine controls. Simply connecting the three
input power leads to the VFD provides all unit power.
Marine container shipment — The compact design allows for
Heat exchanger combinations — The Evergreen 23XRV chillers are available with a complete line of heat exchangers, ensuring the best combi- nation of chiller components to meet project specific tonnage and efficiency requirements. One, 2 and
300 psig piping requirements.
Heat exchanger features
ASME certified construction — An independent agency certifies the design, manufacture, and testing of all heat exchangers to American Society of Mechanical Engineers (ASME) standards, ensuring heat ex- changer safety, reliability and long life. The ASME
High performance tubing — Carrier’s Evergreen chillers utilize advances in heat transfer technology, providing compact,
Cooler tube expansion — Cooler tube expansion at center support sheets prevents unwanted tube move- ment and vibration, thereby reducing the possibility of premature tube fail- ure. Tube wall thickness is greater at the expansion location, support sheets, and end tube sheets in order to provide maximum strength and long tube life.
Condenser baffle — The baffle de- flects hot discharge gas before it con- tacts condenser tubes, reducing tube vibration and wear while distributing
refrigerant more evenly over the length of the vessel for improved efficiency.
Closely spaced intermediate sup- port sheets — Support sheets pre- vent tube sagging and vibration, there- by increasing heat exchanger life.
Refrigerant filter isolation valves
—These valves allow filter replace- ment without pumping down the chill- er, reducing service time and expense.
FLASC (flash subcooler) — The subcooler, located in the bottom of the condenser, increases the refrigeration effect by cooling the condensed liquid refrigerant to a lower temperature, thereby reducing compressor power consumption.
AccuMeter™ system — The AccuMeter system regulates refrigerant flow according to load conditions, providing a liquid seal at all operating conditions, eliminating unintentional hot gas bypass.
Microprocessor controls features
Direct Digital Product Integrated control (PIC III) — Carrier’s PIC III provides unmatched flexibility and functionality. Each unit integrates directly with the Carrier Comfort Network® (CCN) system, providing a solution to controls applications.
International Chiller Visual Con- troller (ICVC) — The ICVC provides an unparalleled ease of operation and can be configured to display English or metric values.
For convenience, a single display lo- cated on the chiller VFD panel displays chiller and VFD data. The VGA 320 x
240element LCD (liquid crystal dis- play) features 4 menu specific soft- keys. The default display offers an
The display includes 4 standard languages:
•English
•Chinese
•Japanese
•Korean
Other languages are available.
Automatic capacity override — This function unloads the compressor whenever key safety limits are ap- proached, increasing unit life. This
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