YVAA — Air cooled screw compressor liquid chiller with Variable Speed Drive, model YVAA

Вид документа	Технічний паспорт
Виробник	JCI
Моделі	YVAA
Група обладнання	other
Мова документа	англійська
Розмір файлу	0.7 МБ

Про документ

The YORK YVAA is an air-cooled screw compressor liquid chiller with variable speed drive, available in 525–1225 kW capacity at 50 Hz with R134a refrigerant and two independent refrigerant circuits. It uses valve-less capacity control via the VSD instead of a slide valve, micro-channel condenser coils, and a hybrid falling film shell-and-tube evaporator.

Ключові дані

Cooling capacity range	525 - 1225 kW
Refrigerant	HFC-134a
Power supply	400 V / 3 phase / 50 Hz
Number of compressors	2
Minimum load	10%
Leaving water temperature	4.4/15.6 °C
Air on condenser	-17.8/51.7 °C
Design working pressure (condenser)	43 bar

Застосування

Outdoor installation (roof or ground level), commercial building air conditioning
Process cooling applications
Thermal storage / ice production (leaving brine below 4.4°C (40°F))
Sound sensitive zones (SilentNight™ time-of-day sound limiting)
Highly corrosive environments (post-coated epoxy dipped condenser option)
Seismic zones require rigid mounting on ground level concrete pads

Особливості

Variable Speed Drive for smooth capacity control from 100% down to 10% of chiller capacity; elimination of slide valve reduces compressor moving parts by 50%
Micro-channel all-aluminium condenser coils; reduces refrigerant charge by as much as 50%; integral sub-cooling
Hybrid falling film evaporator minimizes refrigerant charge
Semi-hermetic direct drive twin-screw compressors with off-cycle heater and IP55 terminal board
SilentNight™ time-of-day sound control, programmable locally or remotely (4-20 mA or 0-10 VDC)
E-Link Gateway for BAS integration (BACnet MS/TP, Modbus, LON, N2)
Up to 40% improvement in real world efficiency versus current products
High ambient operation up to 52°C (125°F) with high airflow fans

Технічні дані

Parameter	Value
Capacity range (50 Hz)	525 - 1225 kW
Compressors per chiller	2 semi-hermetic rotary twin-screw
Independent refrigerant circuits	2
Refrigerant	R134a (GWP 1300)
Refrigerant charge Ckt.-1/Ckt.-2	80/70 … 143/143 kg (per frame)
Oil charge Ckt.-1/Ckt.-2	8.0/7.7 … 16.3/16.3 liters (per frame)
% minimum load	10%
Unit shipping weight	5224 … 9107 kg (per frame)
Operating weight	5434 … 9497 kg (per frame)
Chassis length	5163 … 11865 mm (per frame)
Chassis width	2242 mm
Chassis height	2403 mm
Evaporator type	Shell and tube, hybrid falling film
Evaporator water volume	182 … 428 liters (per frame)
Leaving water temperature (Min/Max)	4.4/15.6 °C
Maximum evaporator water side pressure	10.3 bar
Maximum evaporator refrigerant side pressure	16.2 bar
Evaporator drain connection	3/4 in
Condenser design working pressure	43 bar
Economizer tank design working pressure	31 bar
Condenser fan motors	TEAO squirrel-cage, current protected, direct drive
Air on condenser (Min/Max)	-17.8/51.7 °C
High static fans external static pressure	up to 100 Pa (0.4 in. water)
Power supply	400 V / 3 phase / 50 Hz
Control transformer	115 Vac
Panel ingress protection	IP55
Unit colour	Champagne (RAL 7006), baked-on powder paint
Standard freeze protection	down to -17.8°C (0°F); waterbox heater option down to -28°C (-20°F)
Maximum leaving water temperature	15.6°C (60°F)
Recommended min. water volume (A/C)	3.2 litres per cooling kW; preferred 5.4 to 8.6 l/kW
Recommended min. water volume (process)	6.5 litres per cooling kW; preferred 7.5 to 11.8 l/kW
Variable primary flow	max 10% per minute flow change; 8.6 to 10.8 l/kW system volume

Варіанти замовлення

Nomenclature: YVAA 074 3AXX 50 AA — base product type (Y = York, V = Variable speed screw, A = Air cooled, A = Design series), frame size, configuration (condenser / evaporator / compressor codes, condenser fan & sound kit code), voltage level (50 = 380-415 / 3 / 50), refrigerant (A = R134a), development level (A). Frames listed: 054, 056, 058, 064, 066, 068, 070, 074, 076, 078, 084, 086, 088, 094, 096, 098, 101, 109, 106, 108, 118, 114, 117, 119, 121.

Options include: low noise kits / SilentNight™, ultra quiet fans, high static fans, high airflow fans, post-coated epoxy dipped condenser, wire panels, louvered panels, louvered/wire combination panels, end hail guard, V-guard panels, 38 mm insulation, flange kit (PN10), front fluid inlet, three-pass evaporator, water box heater, high ambient operation, BAS interface (temperature reset offset up to 22.2°C (40°F)), BAS load limit (30-100%), thermal storage, flow switch accessory (SPDT NEMA 3R, 10.3 barg DWP, -29°C to 121°C, 1" NPT), differential pressure switch (0.2-3 barg, 1/4" NPTE), service isolation valve, dual pressure relief valve, circuit breaker, non-fused disconnect switch, elastomeric isolation, 25 mm spring isolators, 50 mm restrained spring isolators.

Допуски та стандарти

Machinery directive (2006/42/EC)
EMC Directive (2004/108/EC)
Pressure Equipment Directive (97/23/EC)
Safety Code for Mechanical Refrigeration EN378-2 (2008)
Designed within EN ISO 9001; built within an EN ISO 9002 accredited manufacturing organisation
Fluorinated greenhouse gases covered by the Kyoto Protocol

Текст документа

FORM 201.28-EG1.EN.PED/CE (1111)

Model YVAA Air Cooled Screw Compressor Liquid Chillers
with Variable Speed Drive
Style A

525 - 1225 kW
2 Compressor
50 Hz
HFC-134a
FORM 201.28-EG1.EN.PED/CE (1111)

FORM 201.28-EG1.EN.PED/CE (1111).................................................................................................................................................................. 1
Introduction........................................................................................................................................................................................................... 3
Ratings .................................................................................................................................................................................................................. 4
Product Description ............................................................................................................................................................................................. 4
MicroComputer Control Center ........................................................................................................................................................................... 6
Accessories and Options .................................................................................................................................................................................... 7
Refrigerant Piping Layout.................................................................................................................................................................................. 10
Application Data ..................................................................................................................................................................................................11
Physical Data ...................................................................................................................................................................................................... 14
Evaporator Options ............................................................................................................................................................................................ 16
Dimensions ......................................................................................................................................................................................................... 17
Electrical Data ..................................................................................................................................................................................................... 18
Power Wiring....................................................................................................................................................................................................... 19
Customer Control Wiring ................................................................................................................................................................................... 20

NOMENCLATURE

YVAA 074 3AXX 50 AA
1 2 3 4 5 6 7 8 9 10 11 12 12 14 15
BASE PRODUCT TYPE FRAME SIZE CONFIGURATION VOLTAGE LEVEL / REFRIGERANT

Y : York # # # # : Condenser code 5 0 : 380-415 / 3 / 50 A : Development Level A
V : Variable # : Evaporator code A : Refrigerant R134a
speed screw # : Compressor code
A : Air cooled # : Condenser fan &
A : Design series sound kit code

2 JOHNSON CONTROLS
FORM 201.28-EG1.EN.PED/CE (1111)

Introduction

For over 135 years, Johnson Controls has raised the Sustainability: Improve your environmental footprint
bar of chiller design and customer expectations. We are
raising the bar again with a leap forward in air-cooled YVAA lowers both direct and indirect impact on the
chiller technology. Continuing the history of innovation in environment. It uses R134a refrigerant which has zero
both compressor design and Variable Speed Drive (VSD) ozone depletion potential (ODP). The design minimizes
technology, Johnson Controls proudly introduces the the quantity of refrigerant used in the system.
YORK® YVAA.
The highest portion of green house gases is carbon dioxide
In the past, the choice to use an air-cooled chiller came generated from electric power plants. HVAC systems are
with the expectation of compromise, where simplicity of one of the largest consumers of electricity in commercial
design and maintenance were traded for performance buildings. YVAA chillers reduce the electricity usage,
and efficiency. The new YVAA provides a better balance thereby contributing to reducing greenhouse gases and
by combining the best of both - a high performance design helping keep the planet cool.
that minimizes the total cost of ownership.
Low Sound: Quiet operation makes you a good
YORK YVAA model air-cooled chillers provide superior neighbour
performance. Higher efficiency heat exchangers coupled
with variable speed operation and smart controls elevate The variable speed technology on YVAA allows unparalleled
the system efficiency to a whole new level. The resulting low sound levels at off peak design conditions. This
benefit from YVAA chillers is much greater than the sum makes YVAA a great solution for sound sensitive zones.
of its parts. Several acoustic attenuation options with smart controls
(SilentNight™), aerodynamic fans and effective sound
Efficiency: Reduce your consumption enclosures will meet the sound levels required.

YVAA chillers are Johnson Controls’ most efficient air- Confidence: Proven performance provides peace of
cooled chillers. The design offers a lighter, smaller and mind
quieter package that minimizes the installed cost and
maximizes usable building space. YVAA chillers are simpler YVAA design is proven by years of success with the
in design with easy access to service components for previous generation of VSD air-cooled screw chillers with
reliable operation and efficient maintenance. With up to a thousands of machines operating in more than one hundred
40% improvement in real world efficiency versus current countries.
products, YVAA sets the new standards for lowering energy
use. YVAA is configurable to be the perfect fit for your unique
needs. YVAA offers an array of options that can be tailored
and tuned to match the capacity, efficiency, sound and
footprint for your specific application. Several variations
of condenser fans, evaporator arrangements, sound kits,
protection enclosures, and controls schemes are available
to meet specific requirements for your site.

JOHNSON CONTROLS 3
FORM 201.28-EG1.EN.PED/CE (1111)

Ratings
COMPUTERIZED PERFORMANCE RATINGS OFF-DESIGN PERFORMANCE
Each chiller is custom-matched to meet the individual Since the vast majority of its operating hours are spent at
building load and energy requirements. A variety of off-design conditions, a chiller should be chosen not only to
standard heat exchangers and pass arrangements are meet the full load design, but also for its ability to perform
available to provide the best possible match. efficiently at lower loads. It is not uncommon for chillers
with the same full load kW/kW to have an operating cost
It is not practical to provide tabulated performance for each difference of over 10% due to part-load operation.
combination, as the energy requirements at both full and
part load vary significantly with each heat exchanger and Part load information can be easily and accurately
pass arrangement. Computerized ratings are available generated by use of the computer. And because it is so
through each Johnson Controls sales office. important to an owner’s operating budget, this information
has now been standardized.

A more detailed analysis must take into account actual
building load profiles, and local weather data. Part load
performance data should be obtained for each job using
its own design criteria.

Product Description
YVAA air-cooled chillers are completely assembled with FLUORINATED GREENHOUSE GASES
all interconnecting refrigerant piping and internal wiring,
This equipment contains fluorinated greenhouse gases
ready for field installation. The unit is pressure tested,
covered by the Kyoto Protocol.
evacuated, and fully factory charged with refrigerant
R134a and oil in each of the independent refrigerant
• The global warming potential of the refrigerant
circuits. After assembly, an operational test is performed
(R134a) used in this unit is 1300.
with water flowing through the evaporator to ensure that
each refrigerant circuit operates correctly. • The refrigerant quantity is stated in the Physical
Data table in this document.
The unit structure is manufactured from heavy gauge, • The fluorinated greenhouse gases in this equipment
galvanised steel and coated with baked-on powder may not be vented to the atmosphere.
paint (colour Champagne ((RAL 7006), (Munsel No. • This equipment should only be serviced by qualified
9.8YR4.36/1.2)). technicians.

YVAA chillers are designed within EN ISO 9001 and
built within an EN ISO 9002 accredited manufacturing SEMI-HERMETIC YORK TWIN-SCREW COMPRESSORS
organisation. Compressors are direct drive, semi-hermetic, rotary twin-
screw type, including: muffler, temperature actuated ‘off-
Chillers conform with the following European Directives: cycle’ heater, IP55 terminal board and precision machined
cast iron housing.
• Machinery directive (2006/42/EC)
• EMC Directive (2004/108/EC) Reliable suction gas cooled, high efficiency, accessible
• Pressure Equipment Directive (97/23/EC) hermetic compressor motor, full suction gas flow through
mesh screen filter, with inherent internal thermal overload
• Safety Code for Mechanical Refrigeration
protection and external current overload on all three
(EN378-2 (2008))
phases.

Continuous function, microprocessor controlled, Variable
Speed Drive (VSD) shall provide valve-less, smooth
capacity control from 100% down to 10% of chiller
capacity.

In addition, elimination of the slide valve and associated
unloading components has resulted in a 50% reduction
in compressor moving parts.

4 JOHNSON CONTROLS
FORM 201.28-EG1.EN.PED/CE (1111)

Product Description - continued
EVAPORATOR ELECTRICAL
The evaporator is a shell and tube, hybrid falling film type YORK has over 25 years of experience designing variable
heat exchanger. It contains a balance of flooded and -speed drives specifically for chiller applications. The
falling film technology to optimize efficiency, minimize result is an extremely reliable air-cooled chiller system that
refrigerant charge, and maintain reliable control. A offers industry leading efficiency at real world operating
specifically designed distribution system provides uniform conditions, valve-less compressor loading/unloading,
refrigerant flow for optimum performance. excellent capacity control, high power factor and soft start..

CONDENSER Incoming single point power is standard utilizing a lockable
circuit breaker, 115 Vac control transformer, VSD, fan
The YVAA introduces micro-channel coil to the York screw
contactors, ON/OFF unit switch, microcomputer keypad
compressor chiller line. The micro-channel maximizes
and display, Chiller Control and VSD Logic boards, and
condenser heat transfer, resulting in a smaller footprint,
relay boards.
and reduces refrigerant charge by as much as 50%.
Standard design includes IP55 rating, powder painted
Each condenser coil is a single piece all aluminium
steel cabinet with hinged, latched, and gasket sealed
construction including headers, tubes and fins to avoid
outer doors equipped with wind struts for safer servicing.
galvanic corrosion due to dissimilar metals. Coils and
The panel includes a control display access door so that
headers are brazed as one piece. Integral sub-cooling is
display and control features can be accessed without
included. The design working pressure is 43 bar.
opening main cabinet doors.
Multiple, standard low sound, high efficiency, TEAO
All exposed power wiring is routed through liquid-tight,
motor driven fans move air through the coils. They are
UV-stabilized, non-metallic conduit.
dynamically and statically balanced, direct drive with
corrosion-resistant glass fibre reinforced composite blades
BUILDING AUTOMATION SYSTEM CAPABILITIES
moulded into low-noise, full airfoil cross sections, providing
vertical air discharge from extended orifices for efficiency The E-Link Gateway provides an economical and versatile
and low sound. connection between York equipment and open/standard
protocols. It efficiently manages the communication
Fan motors are Totally Enclosed Air-Over (TEAO), protocols currently used by York equipment, exposing the
squirrel-cage type and current protected. The direct drive data in a consistent, organized, and defined fashion. The
motors feature double-sealed and permanently lubricated E-Link Gateway is available as a field-installed option on
ball bearings, cutting down on maintenance cost over the YVAA. A simple switch selection allows configuration of
life of the unit. the required equipment profile and output protocol, which
reduces equipment connectivity startup time.
REFRIGERANT CIRCUIT
An independent refrigerant circuit is provided per
compressor. Each circuit uses copper refrigerant pipe
formed on computer controlled bending machines to
reduce the number of brazed joints resulting in a reliable
and leak resistant system.

• Discharge lines are provided with a manual compres-
sor shutoff service valve (See Options and Accessories
for suction line service valve).
• The external oil separators, with no moving parts and
designed for minimum oil carry-over, are mounted in
the discharge line of the compressor.
• Liquid line components include: high absorption re-
movable core filter-drier, sight glasses with moisture
indicators, manual shut-off valve with charging port,
orifice and electronic expansion valve.
• An economizer (flash) tank is located in each refriger-
ant circuit to increase the system efficiency. The design
working pressure is 31 bar.

JOHNSON CONTROLS 5
FORM 201.28-EG1.EN.PED/CE (1111)

MicroComputer Control Center

FIG.1 – VIEW OF YORK CONTROL CENTER USER INTERFACE

MICROCOMPUTER CONTROL CENTER • Evaporator Pump Status
The microcomputer control center (see Figure 1) provides • Evaporator Heater Status
automatic control of chiller operation including compressor • History Data for Last Twenty Normal Shutdowns
start/ stop and load/unload anti-recycle timers, condenser • History Data for Last Ten Shutdown Faults
fans, evaporator pump, evaporator heater, unit alarm
contacts and run signal contacts. The microcomputer
Programmable Setpoints
control center comes online as soon as the main power
• Chiller On/Off
switch on the unit is switched on; immediately, the
microcomputer control center will begin to check all • Chilled Liquid (Water or Glycol)
variables with a frequency ranging from 30 seconds to • Local or Remote Control
almost continuous monitoring. • Units of Measure (Imperial or SI)
• System Lead / Lag
The microprocessor controls the unit’s capacity by
matching the actual leaving chilled liquid temperature • Remote Temperature Reset
(LCHLT) to the user-defined setpoint. Factors that may • Remote Current Limit
cause the system’s actual LCHLT to fluctuate are changes • Leaving Chilled Liquid Temperature Setpoint and
in ambient temperature, loop flow rate, load, and loop Range
volume. The control system reacts to such changes by
adjusting the number of compressors that are on and the
loading of each compressor in order to keep the LCHLT Johnson Controls’ systems or another vendor’s systems
at the setpoint. can incorporate these setpoints and data outputs to give
the customer a complete understanding of how the system
The control system logic monitors the rate at which the is running through a Building Automation System.
LCHLT is approaching the setpoint to ramp up or down
compressor capacity as required. The variable frequency Extreme Conditions - During extreme or unusual
drive allows the compressor capacity to match the load. conditions (i.e. blocked condenser coils, ambient above
scheduled maximum, etc.) the chiller control system will
Display Data avoid shutdown by varying capacity. By monitoring motor
• Leaving Chilled Liquid Temperature current and suction and discharge pressures, the chiller
can maintain maximum available cooling output without
• Returning Liquid Temperature
shutting down.
• Ambient Temperature
• Lead System Unit Safeties are provided for the chiller to perform auto-
• Compressor Capacity (% of Full Load Amps) reset shut down for the following conditions:
• Ambient temperature above or below allowable range
• VSD Output Frequency / Compressor Speed
• Out of range leaving chilled liquid temperature
• Compressor Run Hours
• Under voltage
• Compressor Number of Starts
• Flow switch operation
• Oil Pressure and Temperature (per Compressor)

6 JOHNSON CONTROLS
FORM 201.28-EG1.EN.PED/CE (1111)

Accessories and Options
All options factory mounted unless otherwise noted. POST-COATED EPOXY DIPPED CONDENSER – Micro-
channel condenser coils applied with electro-deposited
SOUND ATTENUATION and baked flexible epoxy coating that is finished with a
polyurethane UV resistant top-coat suitable for highly
LOW NOISE KITS – The standard chiller configuration is corrosive applications.
equipped with low sound fans and acoustic treatments on
the refrigerant lines and compressors. There are several PROTECTIVE CHILLER PANELS
sound attenuation options available to further reduce
sound at its source thereby meeting local sound level WIRE PANELS – UV stabilized black polyvinyl chloride
regulations. coated, heavy gauge, welded wire mesh guards mounted
on the exterior of the full unit. Protects condenser coil
SilentNight™ - Due to time of day based sound faces and prevents unauthorized access to refrigerant
regulations in some locations it may be desirable to components (compressors, pipes, evaporator, etc.), yet
force the chiller to a lower sound level on demand. The provides free air flow. This can cut installation cost by
SilentNight control option provides a control input to limit eliminating the need for separate, expensive fencing.
sound output of the chiller based on time of day. This See Figure 2.
feature is programmable at the chiller panel or can be
controlled remotely via a signal (4-20 mA or 0-10 VDC) LOUVERED PANELS – Louvered panels, painted the
from a BAS system. same colour as the unit, enclose the unit to visually screen
and protect the coils as well as preventing unauthorized
access to internal components. Also available as a
FAN OPTIONS
condenser-only option. See Figures 3 and 4.
ULTRA QUIET FANS – The chiller is equipped with
LOUVERED/WIRE PANELS COMBINATION - Louvered
specially designed fans and motors to provide lower
panels, painted the same colour as the unit, are mounted
sound levels yet retain appropriate airflow. The result is
on external condenser coil faces. Heavy gauge, welded
reduced fan generated sound with minimal effect on the
wire-mesh panels, coated to resist corrosion, are mounted
chiller capacity or efficiency.
around base of machine to restrict unauthorized access.
See Figure 5.
HIGH STATIC FANS - The chiller is equipped with
condenser fans with higher power motors suitable for END HAIL GUARD – Louvered panels, painted the same
high external static pressure, up to 100 Pa (0.4 in. water), colour as the unit, are installed on the rear of the unit
across condenser coils. This option should be selected (opposite end of the control panel) to protect the exposed
if additional airflow resistance may be present due to condenser from flying debris or hail. See Figure 6.
flow restrictions such as field installed ducts, filters,
sound enclosures etc. Please contact your local JCI V-GUARD PANELS – Solid panels, painted the same
representative for more information. colour as the unit, are installed along the sides of the
units to cover exposed piping within the condenser
HIGH AIRFLOW FANS - The chiller is equipped with section without impacting airflow. These guard panels can
condenser fans with airfoil type blades and high power be combined with End Hail Guard option for additional
motors providing extra airflow across coils. In some chiller protection from debris. See Figure 7.
configurations, this option can provide an increase in
chiller capacity at high ambient. The high airflow fans are
also available with variable speed control. Please contact
EVAPORATOR OPTIONS:
your local JCI representative for more information.
38 mm INSULATION – Double thickness insulation
provided.
CONDENSER COIL PROTECTION
FLANGE KIT – Provides contractor with the couplings
The aluminium alloys used in the YVAA micro-channel best suited to tie into the chilled water piping. All flanges
condenser have been carefully selected and tested are PN10.
for high corrosion resistance. However, all metals can
corrode in harsh conditions. Consider protecting coils CONNECTION LOCATION - The standard unit
from corrosive environments such as coastal, marine, configuration is available with fluid inlet connections at
urban and industrial. rear (opposite control panel end) of unit. Option available
for front fluid inlet on select configurations.

JOHNSON CONTROLS 7
FORM 201.28-EG1.EN.PED/CE (1111)

Accessories and Options - continued

FIG. 2 – FULL UNIT WIRE PANELS FIG.5 – LOUVERED/WIRE PANELS COMBINATION

FIG. 3 – FULL UNIT LOUVERED PANELS FIG. 6 – END HAIL GUARD

FIG. 4 – CONDENSERS-ONLY LOUVERED PANELS FIG. 7 – V-GUARD OPTION

8 JOHNSON CONTROLS
FORM 201.28-EG1.EN.PED/CE (1111)

Accessories and Options - continued
THREE-PASS – The standard evaporator is constructed GENERAL OPTIONS:
with two chilled water passes through the evaporator.
The three-pass option is recommended for use in brine FLOW SWITCH ACCESSORY - Vapor proof SPDT, NEMA
applications or where a greater water temperature 3R switch, 10.3 barg (150 psig) DWP, -29°C to 121°C
difference is required but efficiency cannot be sacrificed. (-20°F to 250°F) with 1" NPT (IPS) connection for upright
mounting in horizontal pipe (This flow switch or equivalent
WATER BOX HEATER - The standard unit comes with must be furnished with each unit). Field mounted.
freeze protection on the evaporator down to -17.8°C (0°F).
The waterbox heater option provides additional freeze DIFFERENTIAL PRESSURE SWITCH – This 0.2-3
protection down to -28°C(-20°F). barg (3-45 psig) range switch, with 1/4" NPTE pressure
connections, is an alternative to the paddle-type flow
CONTROLS OPTIONS: switch. Field mounted.
HIGH AMBIENT OPERATION – This provides special
SERVICE ISOLATION VALVE – Service suction isolation
control logic coupled with high airflow fans to permit high
valve added to unit for each refrigerant circuit.
ambient (up to 52°C (125°F)) operation. Fans are airfoil
type blades with high power motors. This option may
DUAL PRESSURE RELIEF VALVE – Two safety relief
also allow for increased machine capacity, allowing the
valves are mounted in parallel; one is always operational
selection of a smaller chassis to meet specific capacity
requirements. to assist in valve replacement during maintenance.

BUILDING AUTOMATION SYSTEM INTERFACE CIRCUIT BREAKER – A unit-mounted circuit breaker
(TEMPERATURE) - Factory installed option to accept a with external lockable handle will be supplied to isolate
4 to 20 mA or a 0 to 10 VDC input to allow remote reset the single point power voltage for servicing. The circuit
of the Leaving Chilled Liquid Temperature Setpoint. The breaker is sized to provide motor branch circuit protection,
setpoint can be positively offset upwards up to 22.2°C short circuit protection and ground fault protection for
(40°F). This option is useful for ice storage or process the motor branch-circuit conductors, the motor control
applications or for periods where higher chilled liquid apparatus and the motors.
temperatures are adequate for low loads. Available alone
or in combination with BAS Load Limit. NON-FUSED DISCONNECT SWITCH – Unit-mounted
disconnect switch with external lockable handle can be
BUILDING AUTOMATION SYSTEM INTERFACE (LOAD supplied to isolate the unit power voltage for servicing.
LIMIT) - Factory installed option to accept a 4 to 20 mA Separate external fusing must be supplied by the power
or a 0 to 10 VDC input to allow remote reset of the Load wiring, which must comply with local codes.
Limit Setpoint. The setpoint can limit system demand
from 30-100%. Available alone or in combination with VIBRATION ISOLATION:
BAS Temperature Reset.
E-Link – The E-Link gateway provides communication E L A S TO M E R I C I S O L AT I O N – T h i s o p t i o n i s
or Building Automation Systems, including BACnet (MS/ recommended for normal installations. It provides very
TP), Modbus, LON and N2. good performance in most applications for the least cost.
Field mounted.
THERMAL STORAGE – Provides special control logic
and modifications to produce leaving chilled brine 25 mm (1") SPRING ISOLATORS – Spring and cage
temperatures below 4.4°C (40°F) primarily at times type isolators for mounting under the unit base rails are
of low ambient temperatures (night time). Option can available to support unit. They are level adjustable. 25 mm
be used to produce ice to supplement cooling and (1") nominal deflection may vary slightly by application.
significantly decrease energy costs. The capability of the Field mounted.
chiller is enhanced by using both ice and chilled water
simultaneously during times of peak cooling needs. 50 mm (2") RESTRAINED SPRING ISOLATORS –
Restrained Spring-Flex Mounting isolators 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 up to 51mm (2").
The deflection may vary slightly by application. They are
level adjustable. Field mounted.

JOHNSON CONTROLS 9
FORM 201.28-EG1.EN.PED/CE (1111)

Refrigerant Piping Layout

CONDENSER COILS

EEV

ECONOMIZER OIL SEPARATOR

TANK

EVAPORATOR

Electronic Expansion Valve
EEV

V
Valve

Low pressure refrigerant (liquid and gas) enters the evaporator and is sprayed across the top of the tube bundle from
spray nozzles. The liquid refrigerant from the nozzles gravity drains down across the tube bundle and is evaporated and
superheated by the heat energy absorbed from the chilled liquid passing through the tubes.

The low pressure refrigerant vapour leaves the top of the evaporator and enters the compressor where the refrigerant
vapour is compressed and the pressure and superheat are increased. The high pressure superheated gas enters the air
cooled condenser where heat is rejected via the condenser coils and fans.

The fully condensed and sub-cooled liquid leaves the air cooled condenser, flows through the filter drier and enters the
economizer (flash) tank. The flow of refrigerant into the economizer is controlled by the electronic expansion valve.

Additional cooling of the refrigerant liquid may take place in the economizer tank when the economizer valve is opened.
After leaving the ecomomizer tank, liquid refrigerant flows through an orifice where pressure reduction and further cooling
takes place. The low pressure refrigerant (liquid and gas) then enters the evaporator.

10 JOHNSON CONTROLS
FORM 201.28-EG1.EN.PED/CE (1111)

Application Data
UNIT SIZING
Avoid over-sizing a chiller. Properly sized chillers operate 1.8 m
stably and provide the best life cycle cost. When designing minimum

phased projects, select multiple small chillers to match
demand for each phase. Use multiple small chillers when
1.8 m 3.0 m
the minimum cooling demand is less than 10% of the minimum minimum
maximum cooling demand.

UNIT LOCATION
The YVAA chillers are designed for outdoor installation.
To achieve optimum performance and trouble-free service
provide adequate space around chillers (see Figure 8).
When selecting chiller installation sites, follow these
requirements:
1. Installation sites may be either on a roof or on ground
level. (See FOUNDATION)
2. Provide space for air to flow into condensers per 1.2 m
Figure 8. Restricted airflow or hot air recirculation minimum
will diminish performance. Johnson Controls’ unit
controls will optimize the operation without nuisance
high pressure safety cutouts; however, the system FIG 8. – ACCEPTABLE MINIMUM CLEARANCES
designer MUST consider potential performance AROUND/BETWEEN UNIT(S) FOR PROPER AIRFLOW
degradation. Recommended clearances for all units
are as follows: FOUNDATION
a. Access to the unit control center stipulates the Mount units on a flat and level foundation, ground or roof,
unit is no higher than on spring isolators. capable of supporting the entire operating weight of the
b. Recommended minimum clearances: equipment. Please contact your nearest Johnson Controls
i. Side to wall – 1.8 m Sales Office for shipping and operating weights.
ii. Rear to wall – 1.8 m
Roof Locations – Provide structure to safely support
iii. Control panel end to wall – 1.2 m the entire weight of the unit and service personnel. Do
iv. Top – no obstructions whatsoever not damage the roof during installation. If the roof is
v. Distance between adjacent units – 3 m “bonded”, consult a building contractor or architect for
special installation requirements. Use spring isolators to
c. No more than one adjacent wall may be higher minimize vibration transmission into building structure.
than the unit Provide additional structural support at the spring-isolator
3. Avoid locations near windows or structures where locations.
normal operating sounds may be objectionable.
4. The condenser fans are propeller-type and are not Ground Locations – Units must be installed on a sub-
recommended for use with ductwork, filters or other stantial base that will not settle and cause strain on the
impediments to airflow in the condenser air stream. refrigerant lines, resulting in possible leaks. A one-piece
5. When obstructions to airflow exist, they must not add concrete slab, with footers extending below the frost line
more than 25 Pascal (0.1”) external static pressure. is recommended. The slab should not be tied to the main
building foundation as operational noise will telegraph.
6. Protection against corrosive environments is available
Mounting holes (5/8”) are provided in the base rails for
by ordering the units with cured epoxy-coating on the
bolting the unit to its foundation.
condenser micro-channel. Epoxy-coated coils should
be used with any units being installed at the seashore,
For ground installations, precautions should be taken to
or where salt spray may hit the units, or where acid
protect the unit from tampering by, or injury to, unauthorized
rain is prevalent.
persons. Fasteners on access panels will prevent casual
7. On installations where winter operation is intended tampering; however, further safety precautions such as
and snow accumulations are expected, additional unit enclosure options, a fenced-in enclosure, or locking
elevation must be provided to insure normal devices on the panels may be advisable. Check local
condenser air flow. authorities for safety regulations.
8. Provide adequate space for tubes to be removed
from evaporator. For clearances please contact your
nearest Johnson Controls Sales Office.

JOHNSON CONTROLS 11
FORM 201.28-EG1.EN.PED/CE (1111)

Application Data - continued
Seismic Applications – Avoid installing chillers on LEAVING WATER TEMPERATURE OUT OF RANGE
springs or roofs where earthquakes are a risk. Springs
The YVAA chiller line has a maximum leaving water
and roofs amplify earthquake forces. Rigidly mounting
temperature of 15.6°C (60°F). Some process applications
chillers to ground level concrete pads is typically the best
require a chilled water temperature higher than what the
option for earthquake zones. Contact Johnson Controls
chiller provides. In those applications, a simple piping
equipment specialists for help with projects that have
change can remove the problem. By using a mixture
seismic requirements.
of chiller-cooled water and returning process water, the
chilled water entering the process can be held at the
CHILLED LIQUID PIPING
desired temperature. (A tank can also be used to meet
Design the chilled liquid piping system so that the high leaving water temperature requirements.) (See
circulating pump discharges into the evaporator. Hand Figure 9)
stop valves are recommended in all lines to facilitate
servicing. Provide drain connections at low points to permit
complete drainage of the evaporator and system piping.

A strainer (40 mesh) is recommended for use on the INLET
line to the evaporator, and must be in place at the initial
operation of the water pumps.

The evaporator must not be exposed to flushing velocities
or debris released during flushing. It is recommended that BYPASS
a suitably sized bypass and valve arrangement is installed
to allow flushing of the piping system. The bypass can be
used during maintenance to isolate the heat exchanger SUPPLY TO LOAD
without disrupting flow to other units.
RETURN FROM LOAD
Pressure-gauge connections are recommended for
installation in the inlet and outlet water lines. Gauges LOAD
are not provided with the unit and are to be furnished by
others.
Chilled liquid lines exposed to the weather should be FIG. 9 – LEAVING WATER TEMPERATURE OUT OF
wrapped with a supplemental heater cable and insulated, RANGE SUGGESTED LAYOUT
or glycol should be added to the chilled liquid to protect
against freezing if low-ambient periods are expected. FLOW RATE OUT OF RANGE
Each YVAA evaporator has a minimum and maximum flow
A flow switch is available as an accessory on all units. A
rate. Some process applications require a flow rate that
flow switch must be installed in the leaving water piping
is out of range for the evaporator. In those applications,
of the evaporator and must not be used to start and stop
a piping change can remove the problem.
the unit.
In applications where the required flow rate is less than
MINIMUM WATER VOLUME
the evaporator’s minimum allowable, the chilled water can
It is good practice to include as much water volume as be recirculated to the chiller. (See Figure 10)
possible in a chilled water loop. This increases the thermal
mass and “Flywheel” effect within the system (i.e. the In applications where the required flow rate is greater than
more; the better) which in turn promotes stables water the evaporator’s maximum allowable, the chilled water can
temperature control and increases reliability by reducing be recirculated to the load (see Figure 11).
compressor cycling.

For air conditioning applications, a minimum of 3.2 litres
per cooling kW is required. It is preferred that the litre
per cooling kW ratio be within 5.4 to 8.6 l/kW range for
constant flow rate chilled liquid systems.

For process applications, a minimum of 6.5 litres per
cooling kW ratio is required with preference towards a
range of 7.5 to 11.8 l/kW. Install a tank or increase pipe
sizes to provide sufficient water volume.

12 JOHNSON CONTROLS
FORM 201.28-EG1.EN.PED/CE (1111)

Application Data - continued
THERMAL STORAGE
Thermal storage is the practice of storing cooling energy
during a period of little or no load and/or low energy costs
for use during periods of high load and/or energy costs.
Conventional cooling systems produce cooling when it is
needed which is commonly during times of peak demand.
Thermal storage allows generation of cooling capacity to
occur during off-peak periods and store that capacity to
meet future cooling requirements. Using thermal storage
BYPASS
can result in smaller equipment sizes, thereby reducing
capital cost, and also can result in significant energy cost
savings.

The YVAA has special control logic to be able to produce
chilled leaving brine temperatures below 4.4°C (40°F) so SUPPLY TO LOAD RETURN FROM LOAD
as to supply a storage tank with chilled liquid during times
of low demand. YVAA chillers selected for thermal storage LOAD
operation can also be selected to efficiently provide chilled
fluid at nominal cooling loads.
FIG. 10 – SUGGESTED LAYOUT FOR APPLICATIONS
VARIABLE PRIMARY FLOW WITH A FLOW RATE LESS THAN THE EVAPORATOR
MINIMUM ALLOWABLE FLOW RATE
Johnson Controls recommends a maximum 10% per
minute flow rate of change, based on design flow, for
variable primary flow applications. Provide 8.6 to 10.8
litre per cooling kW system water volume. Insufficient
system volume and rapid flow changes can cause control
problems or can even cause chiller shutdowns. There
are many other design issues to evaluate with variable
primary flow systems. Consult your Johnson Controls
Sales Office for more information about successfully
applying YVAA chillers.
BYPASS

SUPPLY TO LOAD

LOAD

FIG. 11 – SUGGESTED LAYOUT FOR APPLICATIONS
WITH A FLOW RATE GREATER THAN THE EVAPORA-
TOR MAXIMUM ALLOWABLE FLOW RATE

JOHNSON CONTROLS 13
FORM 201.28-EG1.EN.PED/CE (1111)

Physical Data
The data shown in the tables below is applicable to selected typical configurations. Other configurations are available
through our configuration/selection software. Please contact your nearest Johnson Controls Sales Office for the chiller
configuration that best matches your specific needs.

UNIT FRAME 054 056 058 064 066 068 070 074 076 078 084 086 088
CONDENSER CODE 3 5 8 3 5 8 0 3 5 8 3 5 8
EVAPORATOR CODE B B C A A B C A C C B C C
GENERAL UNIT DATA
Number of Independent Refrigerant Circuits 2
Refrigerant Charge, R-134a, Ckt.-1/Ckt.-2, kg 80/80 86/86 102/102 80/70 86/78 100/89 93/93 80/80 102/102 109/109 96/86 114/102 114/114
Oil Charge, Ckt.-1/Ckt.-2, liters 8.0/7.7 8.5/8.5 9.3/9.3 9.2/7.7 9.7/8.0 10.4/8.5 10.0/10.0 9.3/9.3 10.5/10.510.8/10.8 10.1/9.7 11.1/10.511.1/11.1
% Minimum Load 10%
Unit Shipping Weight, kg 1 5224 5481 6653 5452 5797 6248 6074 5833 6765 7111 6027 7200 7545
Operating Weight, kg 1 5434 5691 7000 5652 5997 6458 6421 6033 7111 7457 6237 7546 7891
Chassis Dimensions - Length, mm 5163 6280 7397 6274 7397 8514 5741 7397 7397 8514 7397 8514 9631
Chassis Dimensions - Width, mm 2242 2242 2242 2242 2242 2242 2242 2242 2242 2242 2242 2242 2242
Chassis Dimensions - Height, mm 2403 2403 2403 2403 2403 2403 2403 2403 2403 2403 2403 2403 2403
COMPRESSORS, SEMI-HERMETIC SCREW
Qty per Chiller 2
CONDENSER FANS
Number Ckt-1/Ckt-2 4/4 5/5 6/6 6/4 7/5 8/6 4/4 6/6 6/6 7/7 7/5 8/6 8/8
Air on Condenser (Min/Max), °C -17.8/51.7
EVAPORATOR, SHELL AND TUBE HYBRID FALLING FILM 2
Water Volume, liters 220 220 269 182 182 220 269 182 269 269 220 269 269
Leaving Water Temperature (Min/Max), °C 3 4.4/15.6
Maximum Water Side Pressure, bar 10.3
Maximum Refrigerant Side Pressure, bar 16.2
Evap Drain Connection, in 3/4

NOTES:
1. Shipping and operating weights shown are for base unit; selected options may add weight to unit. Contact your nearest Johnson Controls Sales office for weight data.
2. The evaporator is protected against freezing to -17.8°C (0°F) with a standard heater.
3. For leaving brine temperature below 4.4°C (40°F) or above 15.6°C (60°F), contact your nearest Johnson Controls Sales Office for application requirements.

14 JOHNSON CONTROLS
FORM 201.28-EG1.EN.PED/CE (1111)

Physical Data - continued
The data shown in the tables below is applicable to selected typical configurations. Other configurations are available
through our configuration/selection software. Please contact your nearest Johnson Controls Sales Office for the chiller
configuration that best matches your specific needs.

UNIT FRAME 094 096 096 098 101 109 106 108 118 114 117 119 121
CONDENSER CODE 3 3 5 8 5 3 5 8 8 3 3 3 5
EVAPORATOR CODE B D E E E C C E E E C E E
GENERAL UNIT DATA
Number of Independent Refrigerant Circuits 2
Refrigerant Charge, R-134a, Ckt.-1/Ckt.-2, kg 96/96 120/120 121/121 123/123 141/120 132/111 134/114 143/125 143/134 134/134 132/132 141/141 143/143
Oil Charge, Ckt.-1/Ckt.-2, liters 10.1/10.1 11.4/11.4 11.4/11.4 11.6/11.6 15.9/11.7 15.5/11.4 15.5/11.4 16.3/12.1 16.3/12.5 15.5/15.5 15.5/15.5 15.9/15.9 16.3/16.3
% Minimum Load 10%
Unit Shipping Weight, kg 1 6385 7382 7707 8052 8258 7763 8603 8603 8948 8416 8266 8761 9107
Operating Weight, kg 1 6594 7758 8097 8442 8648 8109 8993 8993 9339 8806 8612 9151 9497
Chassis Dimensions - Length, mm 8514 8514 8514 9631 9631 9631 10748 10748 11865 9631 10748 10748 11865
Chassis Dimensions - Width, mm 2242 2242 2242 2242 2242 2242 2242 2242 2242 2242 2242 2242 2242
Chassis Dimensions - Height, mm 2403 2403 2403 2403 2403 2403 2403 2403 2403 2403 2403 2403 2403
COMPRESSORS, SEMI-HERMETIC SCREW
Qty per Chiller 2
CONDENSER FANS
Number Ckt-1/Ckt-2 7/7 7/7 7/7 8/8 9/7 9/7 10/8 10/8 10/10 8/8 9/9 9/9 10/10
Air on Condenser (Min/Max), °C -17.8/51.7
EVAPORATOR, SHELL AND TUBE HYBRID FALLING FILM 2
Water Volume, liters 220 310 428 428 428 269 269 428 428 428 269 428 428
Leaving Water Temperature (Min/Max), °C 3 4.4/15.6
Maximum Water Side Pressure, bar 10.3
Maximum Refrigerant Side Pressure, bar 16.2
Evap Drain Conection, in 3/4

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