YORK Millennium Air Cooled Screw Compressor machines are the state-of-the-art in air-cooled
chillers, providing chilled fluids for all air conditioning applications. Completely self-contained
and designed for outdoor installation, these chillers employ new, low noise, energy efficient,
serviceable, semi-hermetic screw compressors designed and manufactured specifically for
this new product line. These compressors, with reliable twin-screw technology, are ideally
matched to evaporators and condensers optimally configured for superior heat transfer and
unit efficiency. Condenser coils are arranged to maximize airflow using full airfoil, high efficiency, low noise fans driven by low energy motors. The screw compressors, high efficiency
evaporator, enhanced heat transfer condensers, and weather tight power and microprocessor
control centers are mounted on a bolted, fully galvanized and powder paint ed, all steel base,
for unsurpassed reliability and performance.
YORK INTERNATIONAL
3
Specifications
These YORK air cooled chillers are shipped as a complete factory package. Each unit is completely assembled with all interconnecting refrigerant piping and
internal wiring, ready for field installation:
COMPLETE FACTORY PACKAGE
• Each compressor is installed on its own independent refrigerant circuit, which is factory pressure
tested, evacuated, then fully charged with refrigerant and oil.
• After assembly , an operational test is performed with
water flowing through the cooler to ensure each circuit operates correctly .
• Cabinet and base frame are constructed of formed
heavy gauge, galvanized steel.
• All external structural parts are covered with architecturally neutral “Desert Sand” (Munsell #10YR6-
2) baked-on enamel powder paint. This provides a
finish which, when subjected to ASTM B117, 500
hour, 5% salt spray conditions, shows breakdown
of less than
lent to ASTM D1654 rating of “6”).
• Design is in accordance with applicable sections of
ASME Pressure Vessel Code, NFPA 70 (National
Electrical Code), U.L. and cU.L. Standards , and
ASHRAE/ANSI-15 Safety Code for Mechanical Refrigeration.
• Units are Rated and Certified in accordance with
ARI Standard 550/590-98.
• All exposed power wiring routed through liquid-tight,
non-metallic conduit.
SEMI-HERMETIC YORK SCREW COMPRESSORS
• An ideal synergy of expertise, sister division YORK
Refrigeration Compressor Engineers as integral
members on YORK Engineered Systems’ Chiller Design T eam, has resulted in a world class compressor
with unequaled performance.
• Continuous function, microprocessor controlled, 3way proportional Capacity Control Valve provides
regulated output pressure independent of valve input
pressure for a stable, smooth, and precise match of
compressor capacity to cooling load to 10% of chiller
capacity .
• Automatic spring return of capacity control valve to
minimum load position ensures compressor starting
at minimum motor load. Internal discharge check to
prevent rotor backspin upon shut-down.
• Acoustically tuned, internal discharge gas muffler
eliminates objectionable noise at the source, while
optimizing flow for maximum performance.
1
/8" either side of a scribed line (equiva-
• Reliable suction gas cooled, high efficiency, accessible hermetic motor with APT2000 type magnet wire
and redundant overload protection using both thermistor and current overload protection.
• Suction gas screen and serviceable, 0.5 micron full
flow oil filter within the compressor housing.
• Some models equipped with tuned port economizer
as appropriate for enhanced capacity and superior
efficiency.
• Cast iron compressor housing precisely machined for
optimal clearances and superb efficiency . Entire compressor, from suction to discharge has a Design
Working Pressure of 450 PSIG (31 bar).
• 350W compressor body cartridge heater.
CONDENSER SECTION
• Condenser Fans with low noise , full airfoil cross section for maximum efficiency, statically and dynamically balanced for low vibration operation, and positioned in extended, formed steel orifices for low sound
and maximum efficiency.
• Condenser fan motors are high efficiency , direct drive,
6-pole, 3-phase, Class-“F”, current overload protected, totally enclosed (TEAO) type with double
sealed, permanently lubricated, ball bearings.
• Fin and tube condenser coils of seamless, internally
enhanced, high condensing coefficient, corrosion resistant copper tubes arranged in staggered rows and
mechanically bonded to corrosion resistant aluminum
alloy fins with full height fin collars. Design working
pressure is 450 PSIG (31 bar).
EVAPORATOR
• High efficiency , direct-expansion type cooler with refrigerant in tubes and chilled liquid through the baffled
shell. Independent circuits provided for each compressor.
• Design working pressure of the shell waterside is
150 PSIG (10.3 bar), and 350 PSIG (24 bar) for the
refrigerant side. Constructed and tested in accordance with applicable sections of ASME Pressure
Vessel Code, Section VIII, Division (1). Water side
exempt per paragraph U-1, (c), (6). Other codes,
such as German TÜV , also available for global customers.
• Water baffles fabricated from galvanized steel to
resist corrosion. Removable heads allow access to
internally-enhanced, seamless, copper tubes. Water vent and drain connections included.
• Cooler equipped with thermostatically controlled
heater for protection to -20°F (-29°C) ambient, and
insulated with ¾" (19mm) flexible, closed-cell foam
(k = 0.25).
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YORK INTERNATIONAL
FORM 201.18-EG1
REFRIGERANT CIRCUIT
• Independent refrigerant circuits per compressor,
each using copper refrigerant pipe formed on computer controlled bending machines. This eliminates
over 60% of system piping brazed joints as compared to designs that use fittings, resulting in a highly
reliable and leak resistant system.
• Liquid line components include: manual shut-off
valve with charging port, high adsorption removable
core filter-drier, solenoid valve, sight glass with moisture-indicator, and reliable thermostatic expansion
valves.
• Economizer is a refrigerant to refrigerant, compact
plate-type heat exchanger to maximize chiller capacity and efficiency by subcooling liquid refrigerant
delivered to the cooler expansion valve. Constructed
of corrosion resistant stainless steel plates formed
to induce turbulent flow and enhance heat transfer,
then oven brazed and pressure tested for reliability.
Designed and constructed in accordance with ASME
and TÜV for 450 PSIG (31 bar). U.L./CSA listed.
• Suction and discharge lines provided with manual
compressor shutoff service valves. Suction line
equipped with closed-cell insulation.
• Oil separators with Design Working Pressure of 450
PSIG (31 bar) and U.L. listing are high efficiency,
augmented aerosol impingement type to maximize
oil extraction without fragile media to break down.An
oil charging valve is included with each refrigerant
circuit.
• Oil cooling provided by dedicated air cooled finned
tube type heat exchanger located in the condenser
section of the machine.
MICROPROCESSOR CONTROLS
• Controls housed in a powder painted steel cabinet
enclosure, equivalent to NEMA 3R/12 (IP55), with
hinged, latched, and gasket sealed, door.
• Liquid crystal 40 character display with text provided
on two lines and light emitting diode backlighting for
outdoor viewing.
• Color coded, 32 button, sealed keypad with sections
for Display, Entry, Setpoints, Clock, Print, Program
and Unit On/Off.
• Standard controls include: brine chilling or thermal
storage, automatic pump down, run signal contacts,
demand load limit from external building automation system input, remote liquid temperature reset
input, unit alarm contacts, evaporator pump control,
automatic reset after power failure, automatic system optimization to match operating conditions, software stored in non-volatile memory (EPROM) to
eliminate chiller failure due to AC power failure.
Programmed setpoints retained in lithium battery
backed RTC memory for a minimum 5 years.
• Display – In English (°F and PSIG) or Metric (°C
and Bars) units, and for each circuit:
♦ Return and leaving chilled liquid, and ambient tem-
perature.
♦ Day, date and time. Daily start/stop times. Holi-
day and Manual Override status.
♦ Compressor operating hours and starts. Auto-
matic or manual lead/lag. Lead compressor identification.
♦ Run permissive status. No cooling load condi-
tion. Compressor run status.
♦ Anti-recycle timer and anti-coincident start timer
status per compressor.
♦ Suction (and suction superheat), discharge, and
oil pressures and temperatures per System.
♦ Percent full load compressor motor current per
phase and average per phase. Compressor capacity control valve input steps.
♦ Cutout status and set-points for: supply fluid tem-
perature, low suction pressure, high discharge
pressure and temperature, high oil temperature,
low and high ambient, phase rotation safety, and
low leaving liquid temperature.
♦ Unloading limit set-points for high discharge pres-
sure and compressor motor current.
♦ Liquid pull-down rate sensitivity (0.5°F to 5°F/
minute in 0.1°F increments).
♦ Status of: evaporator heater, condenser fans, load
and unload timers, chilled water pump.
♦ “Out of range” message.
♦ Up to 6 fault shut down conditions.
♦ Standard Display Language is English, with
tions
for: French, German, Italian, and Spanish.
Op-
• Entry – Enter set point changes, cancel inputs, ad-
vance day , change AM/PM.
• Clock – Time, daily or holiday start/stop schedule,
manual override for servicing.
• Print – Operating data or system fault shutdown his-
tory for last six faults, and software version. Printouts through an RS-232 port via a separate printer
(by others).
• Program –
♦ Low leaving liquid temperature cutout, 300 to 600
second anti-recycle timer, lag compressor start
time delay, and average motor current unload
point. Liquid temperature setpoint reset signal
from YORKISN or building automation system
(by others) via:
YORK INTERNATIONAL
5
Specifications
(Continued)
Pulse width modulated (PWM) input for up to
40°F (22°C) total reset as standard.
Optional
input card for up to 40°F (22°C) reset using a:
4 to 20 milliamp, 0 to 10 VDC input, or discrete
reset input. [NOTE: The Standard MicroPanel
can be directly connected to a YORK ISN Building Automation System via the standard onboard RS485 communication port. This Option
also provides open system compatibility with
other communications networks (BACNET™ &
LONMARK™) via interface through standard
onboard 485 or 232 port and an external
YorkT alk Translator
♦ Additional functions (password protected) for pro-
gramming by a qualified service technician:
Cut-outs for low and high ambient, low suction
pressure, high discharge pressure, high oil temperature.
Refrigerant type.
High discharge pressure unload setpoint.
Fan control discharge pressure set point.
Fan ON/OFF pressure differential.
Compressor motor current percent limit.
Building Automation System interface
.]
♦ The Standard unit controls permit operation down
to 0°F (-18°C) outdoor ambient temperature.
POWER PANEL
• Power panel housed in NEMA 3R/12 (IP55) rain/
dust tight, powder painted steel cabinets with hinged,
latched, and gasket sealed outer doors equipped
with wind struts for safer servicing. Two motor control center cabinets are provided, with independent
doors and separated by a steel barrier panel.
• Current transformers sense each phase, as an input to the microprocessor, to protect compressor motors from damage due to: low input current, high input current, unbalanced current, single phasing,
phase reversal, and compressor locked rotor.
• Control circuit transformer provides 115V / 1 Ø power
to the unit control system. Includes factory primary
wiring from lockable disconnect on panel door separate from the motor control centers, and secondary
wiring supply to the 24V , fused Microprocessor panel
transformer.
• Individual fan motor contactors & external overloads
per condenser fan motor.
• Exposed compressor and fan motor power wiring
routed through liquid tight conduit.
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YORK INTERNATIONAL
Accessories and Options
FORM 201.18-EG1
• CONTROL CIRCUIT TERMINAL STRIP – Provides
power input terminals for field provided power input
in lieu of factory mounted control circuit transformer.
115V, 1∅ Control Circuit Power Terminal Strip located in the Microprocessor Panel to accept a field
provided control power circuit with appropriate
branch circuit protection in accordance with applicable Local and National codes. Provides unit control circuit power, including supply to the 24V, fused
Microprocessor panel transformer.
• BUILDING AUTOMA TION SYSTEM (BAS) INTERFACE – Provides means to reset the leaving chilled
liquid temperature or percent full load amps (current limiting) from the BAS (Factory Mounted):
♦ Printed circuit board to accept 4 to 20 milliamp, 0
to 10 VDC, or dry contact closure input from the
BAS.
♦ A YORK ISN Building Automation System can pro-
vide a Pulse Width Modulated (PWM) signal direct to the standard control panel via the standard
on-board RS485 port.
• PRIMARY CHILLER POWER CONNECTIONS –
See Electrical Data on pages 78 through 89 for specific voltage and options availability. Separate external branch circuit protection and disconnecting
means must be supplied by others in accordance
with applicable Local and National codes. (Factory
Mounted)
â Multiple Point Supply –
wiring connection on all models is Multiple Point
Power Connection to factory provided Terminal
Blocks. Two field supplied electrical power circuits
with appropriate branch circuit protection provide
power to each of two motor control center cabinets, located adjacent to each other at one end of
the chiller. Each cabinet contains starter elements
for one or two compressors and their associated
fan motor starters.
Optional
connection are Non-Fused Disconnects with external lockable handles, or (on two compressor
machines only) Circuit Breakers with external lockable handles. Also
sor machines equipped with multiple point power
supply) are individual system circuit breakers per
each compressor with external lockable handles.
ã Single-Point Supply –
Point power connection configurations are SinglePoint Supply arrangements. A wide variety of these
single-point
customer connection requirement:
♦ Single-Point with Individual System Breakers
–These options consist of field connection to either a unit mounted Terminal Block, or a Non-
YORK INTERNATIONAL
to the Terminal Blocks for field power
Optional
Options
are offered to satisfy most any
Standard
(on 3 & 4 compres-
Optional
field power
to the Multiple
Fused Disconnect Switch with external, lockable
handle (in compliance with Article 440-14 of
N.E.C., to isolate unit power supply for service).
Factory wiring is provided from the T erminal Block
or Disconnect Switch to factory supplied Individual
System Circuit Breakers with external, lockable
handles in each of the two compressor motor control centers.
♦ Single-Point Supply – Also optional (on two com-
pressor machines only) are Single-Point Supply
configurations for field connection of a single electrical circuit to: Terminal Block, Non-Fused Disconnect Switch with lockable external handle (in
compliance with Article 440-14 of N.E.C., to isolate unit power supply for service), or Circuit
Breaker with lockable external handle. Factory
wiring is provided from the Terminal Block, Disconnect Switch, or Breaker directly to the starter
components in each of the two compressor motor
control centers.
• STAR (WYE)-DELTA COMPRESSOR MOTOR
STARTER – Provides smooth starting and approxi-
mately 65% reduced inrush current compared to
across-the-line type start. Two compressor units
equipped with any of the Single-Point Power connection options and Star-Delta starters must also
be equipped with Individual System Circuit Breakers option. Three and four compressor units with
Star-Delta starters must also include Individual System Circuit Breakers option. (Factory Mounted) See
Electrical Data (pages 79 - 89) for availability and
coordination with individual system short circuit protection.
• CONDENSER COIL PROTECTION – Standard con-
denser coil construction materials include aluminum
fins, copper tubes, and galvanized tube supports for
generally good corrosion resistance. However, these
materials are not adequate for all environments. The
system designer can take steps to inhibit coil corrosion in harsh applications and enhance equipment
life by choosing from these options based on project
design parameters and related environmental factors. For additional application recommendations
refer to Form 150.12-ES1. (Factory Mounted)
♦ Black Fin Condenser Coils – Condenser coils
constructed using black epoxy coated aluminum
fin stock for corrosion resistance comparable to
copper fin coils in typical seashore locations. Either this or phenolic (below) recommended for
units installed in coastal environments.
♦ Phenolic Coated Condenser Coils – Completed
condenser coil assemblies are covered with a
cured phenolic coating. Probably the best choice
for seashore or where salt spray may hit the fins,
7
Accessories and Options
(Continued)
and other corrosive applications except: strong alkalies, oxidizers, and wet bromine, chlorine, and
fluorine in concentrations greater than 100 ppm.
♦ Copper Fin Condenser Coils – Coils constructed
with corrosion resistant copper fins. Not recommended in areas where units may be exposed to
acid rain.
• DX COOLER OPTIONS
♦ 300 PSIG (21 bar) Waterside Design Working
Pressure – The DX Cooler W aterside is designed
and constructed for 300 PSIG (21 bar) working
pressure. (Factory Mounted)
Chiller construction in accordance with Pressure
Safety Codes of many countries are available.
Cooler, oil separators, relief valves, safeties, or
other operating devices designed or selected as
required by the indicated Country . Common configurations include:
USA (ASME, ASHRAE-15),
Germany (TÜV), France (CODAP), Italy
(ISPESL), and Poland (UDT)
only on 50 Hz units. Consult with your YORK representative to ensure compliance with job requirements (Factory Mounted).
♦ Flange Accessory – Consists of raised face
flanges to convert grooved water nozzles to
flanged cooler connections. Includes companion
flanges. (Field mounted).
• REMOTE DX COOLER – Includes: â Main condens-
ing unit
chanical devices; ã Separate, insulated cooler; and
ä Field Accessory Kit (per refrigerant circuit: filterdrier shell and cores, liquid line solenoid valve, sight
glass with moisture indicator, and Thermostatic Expansion V alve; also entering and leaving water temperature transducers) for use in the interconnecting
system piping and wiring as designed and installed
by others. Field connections made at the condensing unit liquid stub (after the sub-cooler, or the economizer if the system is so equipped) and at the compressor suction stub. Condensing Unit ships with an
R-22 holding charge. System erection, leak testing,
refrigerant, and charging are by others. See Engineering Supplement 201.10-ES2 for additional information. Remote cooler configuration available with
R-22 only.
less
cooler, refrigerant, and liquid line me-
NOTE: Remote DX cooler applications
. Some available
are outside the scope of ARI Standard – 550/590.
• FLOW SWITCH ACCESSORY – V apor-proof SPDT ,
NEMA 4X switch, 150 PSIG (10.3 bar) DWP, -20°F
to 250°F (-29°C to 121°C), with 1" NPT (IPS) con-
nection for upright mounting in horizontal pipe. (This
flow switch or equivalent must be furnished with each
unit). (Field mounted)
• VIBRATION ISOLATION
♦ Neoprene Isolation – Recommended for normal
installations. Provides very good performance in
most applications for the least cost. (Field
mounted)
♦ 1" Spring Isolators – Level adjustable, spring and
cage type isolators for mounting under the unit
base rails. 1" nominal deflection may vary slightly
by application. (Field mounted)
♦ 2" Seismic Spring Isolators – Restrained Spring-
Flex Mountings incorporate a rugged welded steel
housing with vertical and horizontal limit stops.
Housings designed to withstand a minimum 1.0g
accelerated force in all directions to 2". Level adjustable, deflection may vary slightly by application. (Field mounted)
• ALTERNATIVE CHILLED FLUID APPLICATIONS
Standard
55°F (4°C to 13°C) Leaving Chilled Water Temperature. T o protect against nuisance safety trips below
40°F (4°C) and reduce the possibility of cooler damage due to freezing during chiller operation, the unit
Micro-Processor will automatically unload the compressors at abnormally low suction temperature
(pressure) conditions, prior to a safety shut down.
♦ Process Brine Option – Process or other appli-
cations requiring chilled fluid below 40°F (4°C) risk
water freezing in the evaporator, which is typically
overcome with antifreeze. For these applications,
the chiller performance rating incorporates ‘brine’
(typically ethylene or propylene glycol solution),
and the system design Leaving Chilled Fluid T emperature must be provided on the order form to
ensure proper factory configuration.
♦ Thermal Storage Option – Thermal Storage re-
quires special capabilities from a chiller, including
the ability to ‘charge’ an ice storage tank, then possibly automatically reset for operation at elevated
Leaving Chilled Fluid Temperatures as required
by automatic building controls. The Thermal Storage Option provides Ice Storage duty Leaving
Chilled Fluid setpoints to 15°F minimum (-10°C
minimum) during charge cycle, with a Reset range
to normal supply fluid temperature.
•REMOTE CONTROL PANEL AND WALLADAPTER – See Form 201.00-SG11 for more
information.
water chilling application range is 40°F to
(Only one of the following options can
be offered on a unit at one time: BAS, Remote
Control Panel or Multi-Unit Sequence Control).
(Factory mounted).
8
YORK INTERNATIONAL
FORM 201.18-EG1
•MULTI-UNIT SEQUENCING – A separate Se-
quencing Control Center is provided to handle sequencing control of up to eight chillers in parallel
based on mixed liquid temperature (interconnecting wiring by others).
See Form 150.00-SG2 for
more information. (Only one of the following options can be offered on a unit at a time: BAS, Remote Control Panel or Multi-unit Sequence Control). (Factory mounted).
black polyvinylchloride coated, heavy gauge,
welded wire mesh guards mounted on the exterior of the unit. Protects condenser coil faces and
prevents unauthorized access to refrigerant components (compressors, pipes, cooler, etc.), yet provides free air flow. This can cut installation cost by
eliminating the need for separate, expensive fencing. (Factory mounted)
♦ Louvered Panel Enclosure (Full Unit) – Heavy
gauge louver panels, galvanized and painted just
as the main unit cabinet, provide liberal free air
flow area. Cover coils and around the bottom of
the unit to protect condenser coils, visually screen
mechanical elements, and prevent unauthorized
access to refrigerant components. (Factory
mounted)
♦ Louvered Panels (Condenser Coil Only) – Lou-
vered panels are mounted over the exterior condenser coil faces on the sides of the unit to visually screen and protect coils. (Factory mounted.)
♦ Louvered (Condensers) / Wire (Mechanicals) –
Louvered panels mounted over the exterior condenser coil faces, and heavy gauge welded wire
mesh guards mounted around the bottom of the
unit. Visually screens and protects coils, and prevents unauthorized access to refrigerant components. (Factory mounted.)
• HIGH ST ATIC FANS –
Fans and motors suitable for High External Static
conditions to 0.4 inches of water (100Pa). Since
these require higher power motors and therefore
slightly reduce chiller efficiency, select only if the
installation conditions will impose additional air flow
resistance resulting from such things as field
installed:ducts, filters, sound enclosures, or similar
obstructions to airflow. Contact the factory for performance or electrical implications.
• SOUND REDUCTION OPTIONS –
One or both options may be employed by the system designer as normally generated machine noise
is considered in the overall project design. See Form
201.18-ES1 for additional information.
♦ Low Speed Fans – With this option, the basic
chiller is equipped with 8-pole condenser fan motors in lieu of the standard 6-pole motors, plus
special fans matched to these optional slower motors to retain appropriate airflow. The net result is
reduced fan generated noise with no adverse effect on the chiller capacity or efficiency performance.
2. EER= Chiller EER (includes power from compressors, fans, and control panels 0.8 KW)
3. LCWT = Leaving Chilled Water Temperature
4. Ratings based on 2.4 GPM cooler water per ton
5. Rated in accordance with ARI Standard 550/590-98
6. Certified in accordance with the ARI Water-Chilling Packages Using the Vapor Compression Cycle Certification Program,
which is based on ARI Standard 550/590.
2. EER= Chiller EER (includes power from compressors, fans, and control panels 0.8 KW)
3. LCWT = Leaving Chilled Water Temperature
4. Ratings based on 2.4 GPM cooler water per ton
5. Rated in accordance with ARI Standard 550/590-98
6. Certified in accordance with the ARI Water-Chilling Packages Using the Vapor Compression Cycle Certification Program,
which is based on ARI Standard 550/590.
2. EER= Chiller EER (includes power from compressors, fans, and control panels 0.8 KW)
3. LCWT = Leaving Chilled Water Temperature
4. Ratings based on 2.4 GPM cooler water per ton
5. Rated in accordance with ARI Standard 550/590-98
6. Certified in accordance with the ARI Water-Chilling Packages Using the Vapor Compression Cycle Certification Program,
which is based on ARI Standard 550/590.
2. EER= Chiller EER (includes power from compressors, fans, and control panels 0.8 KW)
3. LCWT = Leaving Chilled Water Temperature
4. Ratings based on 2.4 GPM cooler water per ton
5. Rated in accordance with ARI Standard 550/590-98
6. Certified in accordance with the ARI Water-Chilling Packages Using the Vapor Compression Cycle Certification Program,
which is based on ARI Standard 550/590.
2. EER= Chiller EER (includes power from compressors, fans, and control panels 0.8 KW)
3. LCWT = Leaving Chilled Water Temperature
4. Ratings based on 2.4 GPM cooler water per ton
5. Rated in accordance with ARI Standard 550/590-98
6. Certified in accordance with the ARI Water-Chilling Packages Using the Vapor Compression Cycle Certification Program,
which is based on ARI Standard 550/590.
2. EER= Chiller EER (includes power from compressors, fans, and control panels 0.8 KW)
3. LCWT = Leaving Chilled Water Temperature
4. Ratings based on 2.4 GPM cooler water per ton
5. Rated in accordance with ARI Standard 550/590-98
6. Certified in accordance with the ARI Water-Chilling Packages Using the Vapor Compression Cycle Certification Program,
which is based on ARI Standard 550/590.
2. EER= Chiller EER (includes power from compressors, fans, and control panels 0.8 KW)
3. LCWT = Leaving Chilled Water Temperature
4. Ratings based on 2.4 GPM cooler water per ton
5. Rated in accordance with ARI Standard 550/590-98
6. Certified in accordance with the ARI Water-Chilling Packages Using the Vapor Compression Cycle Certification Program,
which is based on ARI Standard 550/590.
2. EER= Chiller EER (includes power from compressors, fans, and control panels 0.8 KW)
3. LCWT = Leaving Chilled Water Temperature
4. Ratings based on 2.4 GPM cooler water per ton
5. Rated in accordance with ARI Standard 550/590-98
6. Certified in accordance with the ARI Water-Chilling Packages Using the Vapor Compression Cycle Certification Program,
which is based on ARI Standard 550/590.