Accessories and Options ................................................................................................................................................................................... 7
Temperatures and Flows ................................................................................................................................................................................... 10
Water Pressure Drop .......................................................................................................................................................................................... 12
Standard Efciency Ratings – English - 460V/60Hz ....................................................................................................................................... 16
High Efciency Ratings – English - 460V/60Hz............................................................................................................................................... 20
Standard Efciency Ratings – SI - 460V/60Hz................................................................................................................................................. 24
High Efciency Ratings – SI - 460V/60Hz
Standard Efciency Ratings – SI - 400V/50Hz................................................................................................................................................. 32
High Efciency Ratings – SI - 400V/50Hz ........................................................................................................................................................ 36
Standard Efciency Ratings – English - 380V/60Hz ....................................................................................................................................... 40
High Efciency Ratings – English - 380V/60Hz
Standard Efciency Ratings – SI - 380V/60Hz................................................................................................................................................. 48
High Efciency Ratings – SI - 380V/60Hz ........................................................................................................................................................ 52
Physical Data (English - Standard Efciency) ................................................................................................................................................. 56
Physical Data (English - High Efciency)......................................................................................................................................................... 58
Physical Data (SI - Standard Efciency)........................................................................................................................................................... 60
Physical Data (SI - High Efciency) .................................................................................................................................................................. 62
Dimensions – English ........................................................................................................................................................................................ 64
Dimensions – SI .................................................................................................................................................................................................. 84
Isolator Locations – English ............................................................................................................................................................................ 104
Isolator Locations – SI ..................................................................................................................................................................................... 108
Electrical Data - 2 Comp Standard Efciency .................................................................................................................................................116
Electrical Data - 2 Comp High Efciency ........................................................................................................................................................118
Electrical Data - 3 Comp Standard Efciency ................................................................................................................................................ 120
Electrical Data - 3 Comp High Efciency ....................................................................................................................................................... 122
Power Wiring ..................................................................................................................................................................................................... 125
Typical Control Wiring - Two Compressor ..................................................................................................................................................... 128
Typical Control Wiring - Three Compressor .................................................................................................................................................. 130
Application Data ............................................................................................................................................................................................... 132
YORK has a proud history of innovation in both compressor design and variable-speed-drive (VSD)
technology. The LatitudeTM air cooled chiller uses the best of modern screw compressor design
and manufacturing techniques and combines them with the latest in a long line of chiller variable
speed drives. The result is superior control and industry leading efciency at real world conditions.
In addition, by slowing the speed of the chiller to match system requirements at off-design conditions, the chiller sound output is reduced when it is the most sensitive to neighbors – evenings and
weekends.
With the introduction of the YCIV model air cooled chiller, system designers are given the Latitude™to
design around the traditional benets of air cooled chillers and still offer building owners energy efcient system design. In the past, the choice to use an air cooled chiller came with the expectation
of compromise, where simplicity of design and maintenance were traded for performance and ef-
ciency. Now combining the best of both worlds can provide a design that truly delivers the lowest
total cost of ownership.
JOHNSON CONTROLS
3
Specications
POWER AND ELECTRICAL
• Johnson Controls has over 25 years of experience
designing variable speed drives specically for chiller
applications. The result is an extremely reliable air
cooled chiller system that offers industry leading ef-
ciency at real world operating conditions, valve-less
compressor loading/unloading, excellent capacity
control, high power factor and soft start.
• All controls and motor starting equipment necessary
for unit operation shall be factory wired and function
tested.
• VSD Power/Control Panel includes main power
connection(s), VSD and fan motor contactors, current overloads, and factory wiring. Standard design
includes NEMA 3R (IP55) rating, powder painted steel
cabinet with hinged, latched, and gasket sealed outer
doors equipped with wind struts for safer servicing.
• VSD section of power panel includes a dedicated
inverter for each compressor.
• The panel includes control display access door so
display and control features can be accessed without
opening main cabinet doors.
• Two and three compressor models come standard with
single point power connection. In addition, all models
are supplied with a factory mounted and wired control
transformer that will supply all unit control voltage from
the main unit power supply. The transformer utilizes
scheduled line voltage on the primary side and provides 115V/1Ø on secondary.
• The standard power panel is equipped with terminal
block electrical connections at the point of incoming
power. An optional factory mounted circuit breaker is
available, at point of incoming single point connection,
that provides the means to disconnect power and short
circuit protection. The optional lockable operating
handle extends through the power panel door so that
power may be disconnected without opening any panel
doors.
• Short Circuit Withstand Rating of the chiller electri-
cal enclosure is 30,000 Amps for standard terminal
block connection. Ratings IAW (in accordance with)
UL508. (See Accessories and Options section: Can
be increased to 65,000 Amps for 380, 400 & 460V).
• Compressor motors are powered by a variable speed
drive. Therefore, motor current never exceeds the
rated load amps (RLA), providing soft starts with no
electrical inrush. This eliminates the motor heating
and stress always found with conventional motor
starters. In addition, by eliminating the heat build up
during starting, the required off-time between starts is
reduced to a maximum of two minutes.
• Many utility companies charge an additional fee
if power factor is below 0.95. These power factor
adjustments/penalties can affect both regular tariff
rates, as well as demand charges. All YCIV models
have a full load power factor of 95% and maintain this
level throughout the operating range. Specications
should always require the installing contractor to be
responsible for additional cost to furnish and install
power factor correction capacitors if they are not factory mounted and wired.
S E M I - H E R M E T I C Y O R K T W I N S C R E W
COMPRESSORS
Johnson Controls Engineered Systems’ Chiller Design
Team has developed a world class compressor with unequaled performance:
• Continuous function, microprocessor controlled, VSD
provides valveless, smooth capacity control from 100%
down to 10% of chiller capacity for two compressor
chillers and 100% down to 7.5% for three compressor
chillers. In addition, elimination of the slide valve and
associated unloading components resulted in a 50%
reduction in compressor moving parts.
• Compressors are direct drive, semihermetic, rotary
twin-screw type, including: mufer, temperature actuated ‘off-cycle’ heater, rain-tight (IP55) terminal
box, discharge shut-off service valve, and precision
machined cast iron housing mounted on neoprene
isolators.
• Reliable suction gas cooled, high efciency, accessible hermetic compressor motor, full suction gas ow
through 0.006” maximum mesh screen, with inherent
internal thermal overload protection and external current overload on all three phases.
• Suction gas screen and serviceable, 0.5 micron full
ow oil lter within the compressor housing.
• Cast iron compressor housing precisely machined
for optimal clearances and superb efciency. Entire
compressor, from suction to discharge has a Design
Working Pressure of 350 PSIG (24 bar) or higher.
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 ttings, resulting in a highly reliable
and leak resistant system.
• Liquid line components include: liquid line shut-off
valve with charging port, low side pressure relief device, high adsorption removable core lter-drier, sight
glass with moisture-indicator, and electronic expansion
valve.
JOHNSON CONTROLS4
FORM 201.23-EG1 (1007)
• Discharge line provided with manual compressor
shutoff service valve (See Options and Accessories for
suction line valve). Suction line equipped with closed-
cell insulation.
• Insulated external oil separators with no moving parts,
450 PSIG (31 bar) design working pressure, and UL
listing. Refrigerant system differential pressure pro-
vides oil ow through service replaceable, 0.5 micron,
full ow, cartridge type oil lter internal to compres-
sor.
• Oil cooling provided by dedicated air cooled nned
tube type heat exchanger located in the condenser
section of the machine.
• A ash tank is located in each refrigerant circuit to
increase the system efciency. The design working
pressure is 450 PSIG (31 bar).
• Suction lines, oil separators and ash tanks are covered with closed-cell insulation.
EVAPORATOR
• High efciency, direct-expansion type cooler with re
frigerant in tubes and chilled liquid through the bafed
shell. Independent circuits provided for each compressor.
• Design working pressure of the shell waterside is 150
PSIG (10.3 bar), and 235 PSIG (16 bar) for the refrig-
• Removable heads allow access to internally-enhanced, seamless, copper tubes. Water vent and drain
connections included.
• The evaporator is equipped with a thermostatically
controlled heater for protection to -20°F (-29°C) ambient, and shell is covered with 3/4” (19mm), exible,
closed-cell insulation, thermal conductivity of 0.26k
(BTU/HR-Ft2-°F/in.) maximum.
• Water nozzles have grooves for mechanical (ANSI/
AWWA C-606) couplings, and shall be insulated by
Contractor after pipe installation. (See the Accessories
and Options section for ange options.
CONDENSER SECTION
• Condenser fans are dynamically and statically bal
anced, direct drive, corrosion resistant glass ber
reinforced composite blades molded into low noise,
full airfoil cross section, providing vertical air discharge
from extended orices. Guards of heavy gauge, PVC
(polyvinyl chloride) coated.
• Standard and reduced sound level models have
condensers tted with single speed fans. Low sound
models have two speed fans tted.
• The fan motors are the high efciency, direct drive, 6
pole on standard sound models and 8 pole on reduced
and low sound models, 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 coefcient, corrosion resistant copper tubes arranged in staggered rows and
mechanically bonded to corrosion resistant aluminum
alloy ns with full height n collars. Design working
pressure is 450 PSIG (31 bar).
MICROPROCESSOR CONTROLS
• Microprocessor control system provides automatic
control of chiller operation including compressor start/
stop and load/unload, anti-recycle timers, condenser
fans, evaporator pump, evaporator heater, unit alarm
contacts and run signal contacts.
-
• Chiller automatically resets to normal chiller operation
after power failure.
• Unit operating software is stored in non-volatile
memory. Field programmed set points are retained
in lithium battery backed regulated time clock (RTC)
memory for minimum 5 years.
• Alarm contacts are provided to remote alert contacts
for any unit or system safety fault.
• Display and Keypad:
♦ 80 character liquid crystal display that is both view-
able in direct sunlight and has LED backlighting for
nighttime viewing. One keypad and display panel
is provided with every chiller.
♦ Display and keypad is accessible through display
access door without opening main control/electrical
cabinet doors.
♦ Display provides unit setpoints, status, electrical
data, temperature data, pressures, safety lockouts and diagnostics without the use of a coded
display.
♦ Descriptions in English (or available language op-
tions), numeric data in English (or Metric) units.
setpoint, control range; local or remote control; units of
measure; compressor lead/lag; and maximum chilled
water setpoint reset temperature range.
• Display Data: Chiller liquid return and leaving tempera-
tures, ambient, lead compressor identication, clock
JOHNSON CONTROLS
5
Specications (Continued)
and schedule, (variable) out of range, remote input
indication, chilled liquid reset setpoint, and history
data for last ten shutdown faults. Compressor suction, discharge, and oil pressures and temperatures,
suction and discharge superheats, percent of full-load,
operating hours, starts, and anti-recycle timer status.
Status Messages for manual override, unit switch off,
compressor run, run permissive, remote controlled
shut down, no cooling load, daily/holiday shut down,
anti-recycle timer.
• During extreme or unusual conditions (i.e. blocked
condenser coils, ambient above scheduled maximum,
etc.) the chiller control system will avoid safety shutdown by varying the chiller controls and cooling load
output to stay online and avoid safety limits being
reached. This allows maximum possible cooling capacity until the unusual condition is cleared and avoids
costly shutdowns. The system monitors the following
parameters and maintain the maximum cooling output
possible without shutdown of the equipment: motor
current, suction pressure and discharge pressure.
• System Safeties are provided for individual compres-
sor systems to perform auto-reset shut down (manual
reset required after the third trip in 90 minutes). Safeties include: high discharge pressure or temperature,
low suction pressure, high / low motor current, high
motor temperature, high pressure switch, high / low
differential oil pressure, high oil temperature, low suction superheat, critical sensor malfunction, low or high
current, phase loss/single phase power, overload of
motor windings, and low voltage.
• Unit Safeties are provided for the chiller to perform
auto-reset shut down for the following conditions: high
or low ambient, low leaving chilled liquid temperature,
under voltage, and ow switch operation.
COMPLETE FACTORY PACKAGE
• These 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 eld installation:
• Each compressor is installed on its own independent
refrigerant circuit, which is factory pressure tested,
evacuated, then fully charged with R134a refrigerant
and oil.
• After assembly, an operational test is performed with
water owing through the cooler to ensure each circuit
operates correctly.
• Unit panels, structural elements, control boxes and
heavy gauge structural base shall be constructed
of galvanized steel. Unit panels, control boxes and
structural base are nished with a baked on powder
paint. All painted surfaces shall be coated with baked
on powder paint which, when subject to ASTMB117,
1,000 hour, 5% salt spray test, yields minimum ASTM
1654 rating of “6”.
• Design is IAW 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 (all) and Certied (140 - 200 tons) IAW
ARI Standard 550/590-98.
•Design is IAW ASHRAE 90.1 Energy Standard for
Building Except Low-Rise Residential Buildings and
ARI 70 Sound Rating of Large Outdoor Refrigeration
and Air Conditioning Equipment.
• YCIV chillers are designed within EN ISO 9001 and
built within an EN ISO 9002 accredited manufacturing
organization.
• All exposed power wiring routed through liquid-tight,
UV-stabilized, non-metallic conduit.
• When required, chillers have the option available to
conform with the following European Directives (50
Hz only):
♦ Machinery Directive (89/9/EEC)
♦ Low Voltage Directive (7//EEC, EN 600)
♦ EMC Directive (89/6/EEC)
♦ Pressure Equipment Directive (97//EC)
♦ Safety Code for Mechanical Refrigeration (EN78)
JOHNSON CONTROLS6
Accessories and Options
FORM 201.23-EG1 (1007)
SOUND REDUCTION OPTIONS – The standard chiller
has fans that operate at normal speed, no compressor
enclosure, and is typically used in non-sensitive sound
areas such as industrial areas or locations with loud trafc
background noise. One or more of the following sound re-
duction options may be employed by the system designer
as normally generated machine noise is considered in the
overall project design.
Ultra Quiet Fans (Factory Mounted) – With this option,
the basic chiller is equipped with specially designed fans
and motors to provide lower sound levels and retain appropriate airow. The result is reduced fan generated
noise with no adverse effect on the chiller capacity or
efciency performance.
Two-Speed Fans (Factory Mounted) – With this option,
the basic chiller is equipped with fans designed with two
operating speeds. At high ambient conditions the fans
operate at the normal speed with sound levels equivalent
to Ultra Quiet Fans. As the ambient temperature falls the
fans automatically reduce to slow speed reducing sound
levels. If very low sound is required at all ambient condi-
tions normal fan speed can be inhibited.
Reduced Sound Option (Factory Mounted) – With this
option the chiller is equipped with an unlined compressor enclosure. This option is typically used for daytime
operation where background noise is lower than normal
city trafc etc.
Low Sound Option (Factory Mounted) – This option
is only available with the selection of Ultra Quiet Fans or
Two-Speed Fans. The chiller is equipped with an acousti-
cally lined compressor enclosure. This option is typically
for locations near residential areas, hotels, or hospitals
etc where background noise is limited. When paired with
the Two-Speed Fan option the unit can operate at normal
speed during the day, when background noise levels are
noticeable, and at low speed in the evening and at night
when background levels are lower.
SilentNight™ - Standard variable speed compressors
result in a chiller system that has lower part load sound
values than conventional air-cooled chillers. Over 99%
of chiller operating hours occur when building loads are
less than design and/or ambient temperatures are less
than design. As a result, all YCIV model chillers will
operate with less than full load sound output nearly all
the time – this is especially important on evenings and
weekends when neighbors are home the most. Due to
time of day based sound regulations it may be desirable
to force the chiller to a lower sound level on demand.
The SilentNight™ control option provides a control input
to limit sound output of the chiller based on time of day.
This feature is programmable at the chiller panel or can
be controlled remotely via signal (4-20mA or 0-10 VDC)
from a BAS system.
CIRCUIT BREAKER – Power panel will come equipped
with a factory mounted circuit breaker at point of incom-
ing single or multi-point connection that provides the
following:
• Means to disconnect power mounted on chiller.
• Circuit breaker sized to provide the motor branch
circuit protection, short circuit protection and ground
fault protection for the motor branch-circuit conductors,
the motor control apparatus and the motors. (Chiller
mounted circuit breaker option sized for branch circuit
protection eliminates the need to provide a separate
‘line of sight’ disconnect and separate branch circuit
protection device.)
• Lockable operating handle that extends through power
panel door so that power may be disconnected without
opening any panel doors.
• Short Circuit Withstand Rating of the chiller electrical
enclosure when using circuit breaker option is 380,
400, & 460V: 65,000 Amps. Rating IAW UL508.
CONDENSER COIL PROTECTION – Standard con-
denser coil construction materials include aluminum ns,
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 applica-
tions and enhance equipment life by choosing from these
options based on project design parameters and related
environmental factors. (Factory Mounted)
• PRE-COATED FIN CONDENSER COILS – The air
cooled condenser coils are constructed of epoxy-
coated aluminum ns. This can provide corrosion
resistance comparable to copper-n coils in typical
seashore locations. Either these or the post coated
coils (below), are recommended for units being installed at the seashore or where salt spray may hit
the unit.
• POST-COATED EPOXY DIPPED CONDENSER
COILS – The unit is built with dipped-cured epoxy
condenser coils. This is another choice for seashore
and other corrosive applications (with the exception
of strong alkalies, oxidizers and wet bromine, chlorine and uorine in concentrations greater than 100
ppm).
• COPPER FIN CONDENSER COILS – The unit con-
structed with copper tube condenser coils, which have
copper ns. (This is not recommended for units in
areas where they may be exposed to acid rain.)
PROTECTIVE CHILLER PANELS:
• Wire Panels (full unit) – UV stabilized black polyvi-
nyl chloride 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,
JOHNSON CONTROLS
7
Accessories and Options (Continued)
cooler, etc.), yet provides free air ow. This can cut
installation cost by eliminating the need for separate,
mounted over the exterior condenser coil faces on the
sides of the unit to visually screen and protect coils.
(Factory mounted)
• Louvered Panels (full unit) – Painted steel to match
unit panels, to protect condenser coils from incidental
damage, visually screen internal components, and
prevent unauthorized access to internal components.
(Factory mounted)
• Louvered (Condensers)/Wire Panels (Mechanical)
– Louvered steel panels on external condenser coil
faces, painted to match unit panels. Heavy gauge,
welded wire-mesh, coated to resist corrosion, around
base of machine to restrict unauthorized access. (Fac-
• Chiller to accept 4 to 20mA or 0 to 10 VDC input to
reset the leaving chilled liquid temperature. (Factory
Mounted)
MULTI-UNIT SEQUENCE CONTROL:
Separate sequencing control center provided to permit
control of up to eight chillers in parallel based of mixed
liquid temperature (interconnecting wiring by others).
(Field Mounted)
VIBRATION ISOLATION:
• Neoprene Isolation – Recommended for normal in-
stallations. 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 deection may vary slightly by appli-
cation. (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” (51mm). Level adjustable,
deection may vary slightly by application. (Field
mounted)
BUY AMERICAN ACT COMPLIANCE - In keeping with
the “Buy America Act”, products will be comprised of 50%
or more U.S. content and manufactured (nal assembly)
in the U.S.A.
• Opposite Handed evaporator water connections
for ease of installation. Standard water connections
are on the left-hand side of the unit, when viewed from
the control panel end.
FLOW SWITCH ACCESSORY : Vapor proof SPDT, NEMA
3R switch, 150 PSIG (10.3 bar) DWP, 20°F to 250°F
(-28.9°C to 121.1°C) with 1” NPT (IPS) connection for
upright mounting in horizontal pipe (This ow switch or
equivalent must be furnished with each unit). (Field
Mounted).
DIFFERENTIAL PRESSURE SWITCH - Alternative to the
paddle-type ow switch. 3-45 PSIG (0.2-3 bar) range with
1/4" NPTE pressure connections. (Field Mounted)
SERVICE ISOLATION VALVE – Service suction isolation added to unit for each refrigerant circuit. (Factory
Mounted)
CHICAGO CODE RELIEF VALVE - Special relief valves per Chicago code. (Factory Mounted)
PRESSURE RELIEF (CE/PED) SERVICE VALVE KIT
- Each relief valve is mounted on a sealable ball valve to
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 IAW ARI Standard 550/590-98. ARI 550/590 does not provide certication for 50Hz ratings. The unique use of the YCIV variable speed drive allows compressor operation at the output
speed regardless of the input power frequency. This allows for common unit/heat exchanger congurations between 60Hz and 50Hz with closely matching capacity.