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YVAA — Air-cooled screw liquid chiller with variable speed drive, model YVAA

Вид документаІнструкція
ВиробникJCI
МоделіYVAA
Група обладнанняtemperature
Мова документаанглійська
Розмір файлу7.8 МБ

Про документ

YORK YVAA Style A is a packaged air-cooled screw liquid chiller with integral variable speed drive, for cooling water or glycol solutions in outdoor rooftop or ground-level installations. It uses two semi-hermetic twin-screw compressors in independent refrigerant circuits, a hybrid falling film evaporator and microchannel condenser coils, with valve-less smooth capacity control from 100% down to 10% of chiller capacity via VSD speed control.

Ключові дані

Frame sizes015 to 052 (150 ton to 500 ton / 525 kW to 1750 kW)
CompressorsTwo semi-hermetic screw per chiller
RefrigerantsR-134a or R-513A
Power supply frequencies50 Hz and 60 Hz
Voltage options200/230/380/400/460/575 V - 3 phase
Leaving water temperature range40/60 °F (4.4/15.6 °C)
Condenser design working pressure375 psig (25.9 barg)
Evaporator maximum water side pressure150 psig (10.3 barg)

Застосування

  • Cooling water or glycol solutions for air conditioning installations
  • Thermal storage (leaving chilled brine below 4.4°C / 40°F at low ambient, ice production)
  • Process applications with remote setpoint reset (temperature up to +22.2°C / 40°F offset) and load limit (30%–100%)
  • Variable primary flow systems

Особливості

  • Integral transistorized PWM variable speed drive with soft start, no electrical inrush; displacement power factor 0.95 at part or full load
  • Valve-less capacity control 100% down to 10%; slide valve eliminated, ~50% reduction in compressor moving parts
  • Shell-and-tube hybrid falling film evaporator minimizing refrigerant charge
  • Micro-channel all-aluminum condenser coils with integral subcooling; optional epoxy-dipped coils for corrosive environments
  • Microcomputer control center with keypad/display, BAS communications (BACnet MS/TP, Modbus RTU, N2 via E-Link or SC-EQ YorkTalk protocol), SD card data logging
  • Sound attenuation options: SilentNight™ time-of-day sound limiting, ultra quiet fans, high airflow/high static fans
  • Optional vibration isolators (elastomeric, 1 in. spring, 2 in. restrained spring)
  • Water box heaters and evaporator heater mats for freeze protection

Технічні дані

Parameter Value
Frame size range 015 to 052
Capacity range 150 ton to 500 ton (525 kW to 1750 kW)
Number of compressors 2 semi-hermetic screw per chiller
Independent refrigerant circuits 2
Refrigerants R-134a, R-513A
Minimum load 10 %
Leaving water temperature (min/max) 40/60 °F (4.4/15.6 °C)
Air on condenser (min/max) 0/131 °F (-17.8/55 °C) (microchannel); 0/125 °F (-17.8/51.7 °C) (round tube)
Condenser coil design working pressure 375 psig (25.9 barg)
Maximum evaporator water side pressure 150 psig (10.3 barg)
Maximum evaporator refrigerant side pressure 235 psig (16.2 barg)
Chassis dimensions Width 88.3 in. (2243 mm); height 94.6 in. (2403 mm); length varies by frame (203.3 to 599.3 in.)
Minimum chilled water flow rate e.g. 250 gpm frame 015 to 550 gpm frame 052
Maximum chilled water flow rate e.g. 980 gpm frame 015 to 1880 gpm frame 052
Inlet/outlet water connections 6 in. or 8 in. depending on frame
Evaporator drain connection 3/4 in.
Voltage utilization ranges 200/60/3: 180–220; 230/60/3: 208–254; 380/60/3: 342–418; 400/60/3: 360–440; 460/60/3: 414–508; 575/60/3: 520–635; 400/50/3: 360–440
Control supply transformer 115 VAC from high voltage input
Water box heater power supply 115 V/60 Hz or 220 V/50 Hz single phase (customer supplied)
Flow switch requirement Paddle type 10 bar (150 psig), 1 in. N.P.T., gold plated contacts, terminals 2 and 13 on 1TB
Anti-recycle timer 120 seconds
High discharge pressure cutout (software) Fault above 22.4 barg (325 psig) for 0.5 s; restart below 20.3 barg (295 psig)
HPCO mechanical cutout Opens 23.2 barg ± 0.55 barg (337 psig ± 8 psig); closes 17.4 barg ± 0.69 barg (252 psig ± 10 psig)
High differential oil pressure cutout 4.48 barg (65 psid)
Low differential oil pressure cutout ramp 0 to 2.09 barg (0 to 30 psid) over 5 to 10 min by ambient temp
Discharge temperature cutout 121 °C (250 °F) fault; start inhibit above 93 °C (200 °F)
Motor temperature cutout 121 °C (250 °F) fault; start inhibit above 116 °C (240 °F)
Default suction pressure cutout (R-134a) 26.1 psig (water cooling); programmable 24.0–36.0 psig water / 5.0–36.0 psig glycol
Default suction pressure cutout (R-513A) 30.2 psig (water cooling); programmable 30.2–40.7 psig water / 7.7–40.7 psig glycol
Default leaving chilled liquid setpoint 44 °F (6.7 °C); range water cooling 40.0–60.0 °F, glycol 15.0–70.0 °F
Vacuum dehydration limit Do not go below 5000 μm during dehydration; final evacuation less than 500 μm (1000 μm acceptable)

Допуски та стандарти

  • ISO9001 certified production facility; ASHRAE 90.1 compliant
  • EN ISO 9001 design; built within EN ISO 9002 accredited organization
  • Machinery Directive (2006/42/EC); EMC Directive (2004/108/EC); Pressure Equipment Directive (97/23/EC); Low Voltage Directive (2006/95/EC)
  • EN378-2(2008) Safety Code for Mechanical Refrigeration
  • ANSI/ASHRAE 15; ANSI/ASHRAE 34; ANSI/NFPA 70 (NEC); ASME Boiler and Pressure Vessel Code Section VIII, Division 1
  • GB5226.1; GB25131 (GB marked units)
  • Class A, Group 1 EMC: EN 61000-6-2:2005 and EN 61000-6 4:2007 (with EN 55011:2007 limits)
  • ARI-590-92 (evaporator pressure drop rating basis)
  • Flanges to ISO 7005 – NP10

Текст документа

                                                Air-Cooled Screw Liquid Chillers

Installation, Operation, Maintenance      Supersedes: 201.28-NM1.1 (724)   Form 201.28-NM1.1 (1225)

                                                                                035-23219-100

                        Model YVAA Style A
      Air-Cooled Screw Liquid Chillers with Variable Speed Drive
                       Frame Sizes 015 to 052
                         150 ton to 500 ton

                                       525 kW to 1750 kW
                                        Two Compressor
                                        50 Hz and 60 Hz




                                       R-134a or R-513A



                                            Issue Date:
                                         December 22, 2025
                                                                                                        Form: 201.28-NM1.1
                                                                                                      Issue date: 12/22/2025




                                            Important
                                   Read before proceeding
                                         General safety guidelines
This equipment is a relatively complicated apparatus.         which it is situated, as well as severe personal injury or
During rigging, installation, operation, maintenance,         death to themselves and people at the site.
or service, individuals may be exposed to certain
components or conditions including, but not limited to:       This document is intended for use by owner-authorized
heavy objects, refrigerants, materials under pressure,        rigging, installation, and operating/service personnel. It
rotating components, and both high and low voltage.           is expected that these individuals possess independent
Each of these items has the potential, if misused or          training that will enable them to perform their assigned
handled improperly, to cause bodily injury or death. It is    tasks properly and safely. It is essential that, prior to
the obligation and responsibility of rigging, installation,   performing any task on this equipment, this individual
and operating/service personnel to identify and               shall have read and understood the on-product labels,
recognize these inherent hazards, protect themselves,         this document and any referenced materials. This
and proceed safely in completing their tasks. Failure to      individual shall also be familiar with and comply with
comply with any of these requirements could result in         all applicable industry and governmental standards and
serious damage to the equipment and the property in           regulations pertaining to the task in question.



                                                 Safety symbols
The following symbols are used in this document to alert the reader to specific situations:


              Indicates a possible hazardous situation                     Identifies a hazard which could lead
              which will result in death or serious injury                 to damage to the machine, damage to
              if proper care is not taken.                                 other equipment and/or environmental
                                                                           pollution if proper care is not taken or
                                                                           instructions and are not followed.


              Indicates a potentially hazardous situa-                     Highlights additional information useful
              tion which will result in possible injuries                  to the technician in completing the work
              or damage to equipment if proper care is                     being performed properly.
              not taken.




              External wiring, unless specified as an optional connection in the manufacturer’s product line, is
              not to be connected inside the control cabinet. Devices such as relays, switches, transducers and
              controls and any external wiring must not be installed inside the micro panel. All wiring must be in
              accordance with Johnson Controls’ published specifications and must be performed only by a qualified
              electrician. Johnson Controls will NOT be responsible for damage/problems resulting from improper
              connections to the controls or application of improper control signals. Failure to follow this warning
              will void the manufacturer’s warranty and cause serious damage to property or personal injury.




2                                                                               © 2025 Johnson Controls. All rights reserved.
Form: 201.28-NM1.1
Issue date: 12/22/2025




               Working with chiller vessels which are designed to contain contents under pressure must only be
               conducted by fully qualified technicians who have been certified in accordance with EPA Section 608
               of the Clean Air Act requirements for the US or equivalently the Federal Halocarbon Regulations
               and the Refrigerant Code of Practice for Canada. This equipment is only intended for installation
               in locations that are not accessible to the general public. Further, this equipment is not intended for
               use by persons (including children) with reduced physical, sensory or mental capabilities, or lack
               of experience and knowledge. Failure to meet this requirement can result in damage to equipment,
               release of refrigerant into the environment, contamination of the operating space for the equipment
               and pose a risk of personal injury or death. It is the responsibility of any service technician or opera-
               tor to adhere to these requirements.



                                       Changeability of this document
In complying with the Johnson Controls® policy for             It is the responsibility of rigging, lifting, and operating/
continuous product improvement, the information                service personnel to verify the applicability of these
contained in this document is subject to change without        documents to the equipment. If there is any question
notice. Johnson Controls makes no commitment to                regarding the applicability of these documents,
update or provide current information automatically            rigging, lifting, and operating/service personnel should
to the manual or product owner. Updated manuals, if            verify whether the equipment has been modified and
applicable, can be obtained by contacting the nearest          if current literature is available from the owner of the
Johnson Controls Service office or accessing the               equipment prior to performing any work on the chiller.
Johnson Controls Knowledge Exchange website at
https://docs.johnsoncontrols.com/chillers/




                                      Conditioned-based maintenance
Traditional chiller maintenance is based upon assumed          customized Planned Service Agreement that leverages
and generalized conditions. In lieu of the traditional         real time and historical data, delivering performance
maintenance program, a Johnson Controls YORK                   reporting, corrective actions required and data enabled
Conditioned Based Maintenance (CBM) program can                guidance for optimal operation and lifecycle assurance.
be substituted. This CBM service plan is built around          The program will include fault detection diagnostics,
the specific needs for the chiller, operating conditions,      operation code statistics, performance based algorithms
and annualized impact realized by the chiller.                 and advance rules based rationale delivered by the
Your local Johnson Controls Branch can propose a               Johnson Controls Connected Equipment Portal.




© 2025 Johnson Controls. All rights reserved.                                                                            3
                                                                                                      Form: 201.28-NM1.1
                                                                                                    Issue date: 12/22/2025


                                           Associated literature
                                         Manual description                                             Form number
Equipment Pre-Startup and Startup Checklist                                                               201.28-CL2
YVAA Style A Frame Size 015 - 027, 2 Compressor 60 Hz (150-350 Tons)
                                                                                                          201.28-RP1
YVAA Style A Frame Size 054 - 098, 2 Compressor 50 Hz (525-950 KW) Manufactured before April 2012
YVAA Style A Frame Size 015 - 052, 2 Compressor 50 & 60 Hz (150-500 Tons)
                                                                                                          201.28-RP2
(Manufactured after April 2012 to before September 2014)
YVAA Style B Frame Size 015 - 052, 2 Compressor 50 & 60 Hz (150-500 Tons)
                                                                                                          201.28-RP3
(Manufactured after September 2014)




                                      UNIT NOMENCLATURE

                            YVAA         074     WXYZ         46      A         A

        Base Product Type
        Y = YORK
        V= Variable Speed Screw
        A = Air Cooled Chiller                                                          Level / Refrigerant
        A = Design Series                                                               A = Refrigerant R-134a
                                                                                        B = Refrigerant R-513A
               Frame Size

                                                                                        Development Level
    Selected Configuration                                                              (Engineering Change
    (Unit Designator)                                                                   or PIN)
    W = Condenser Code
    X = Evaporator Code
    Y = Compressor Code                                                                Voltage
    Z = Condenser Fan & Sound Kit Code                                                 17 = 200 / 3 / 60
                                                                                       28 = 230 / 3 / 60
                                                                                       40 = 380 / 3 / 60
                                                                                       46 = 460 / 3 / 60
                                                                                       50 = 400 / 3 / 50
                                                                                       58 = 575 / 3 / 60                           LD23524a




                                                                                                      Products are produced at a
                                                                                                      facility whose quality-
                                                                                                      management systems are
    ASHRAE     90.1   Compliant                                                                       ISO9001 certified.




4                                                                             © 2025 Johnson Controls. All rights reserved.
Form: 201.28-NM1.1
Issue date: 12/22/2025




               The Control/VSD Cabinet contains                                 NEVER allow the Control Panel VSD
               lethal high AC and DC voltages. Before                           Cabinet doors to remain open if there
               performing service inside the cabinet,                           is a potential for rain to enter the panel.
               remove the AC supply feeding the chiller                         Keep doors closed and assure all latches
               and verify using a non-contact voltage                           are engaged on each door unless the unit
               sensor.                                                          is being serviced.
               The DC voltage on the VSD DC Bus
               will take 5 minutes to bleed off, after AC                       ALWAYS lockout the disconnect supplying
               power is removed. Always check the DC                            AC to the chiller.
               Bus Voltage with a Voltmeter to assure
               the capacitor charge has bled off before
               working on the system.

               NEVER short out the DC Bus to discharge                          The 1L Line Inductor will reach operating
               the filter capacitors.                                           temperatures of over 150°C (300°F.) DO
                                                                                NOT open panel doors during operation.
                                                                                Assure the inductor is cool whenever
                                                                                working near the inductor with power
                                                                                OFF.
               NEVER place loose tools, debris, or any
               objects inside the Control Panel/VSD
               Cabinet.




                                                   Revision notes
Revisions made to this document are indicated in the following table. These revisions are to technical information,
and any other changes in spelling, grammar, or formatting are not included.

 Affected pages              Description
 41                          Updated: Location requirements
 52                          Note added
 117                         Updated: Operating controls
 117                         Added: Microboard Overview – IPU2
 117                         Added: Microboard Overview – IPU3
 124                         Added: Figure 31 - 331-03478-xxx microboard with IPU3 microprocessor
 125                         Updated: Building automation system (BAS) communications
 126                         Updated: E-Link or SC-EQ interface using YorkTalk Protocol
 127                         Note added
                             Added: Figure 32 - SC-EQ Communication Card Connections for chillers with the 03478
 128
                             microboard and IPU2 processor YCAV / YCIV / YVAA / YVWA / YVFA
                             Added: Figure 33 - SC-EQ Communication Card Connections for chillers with the 03478
 129
                             microboard and IPU3 processor YCAV / YCIV / YVAA / YVWA / YVFA
 130                         Added: Program update / SD card features IPU2
 131                         Added: Program update / SD card features IPU3
 133                         Added: Table 16 - Data logging IPU2 and IPU3
 137                         Added: System Backup and Restore


© 2025 Johnson Controls. All rights reserved.                                                                            5
                                                                 Form: 201.28-NM1.1
                                                               Issue date: 12/22/2025




    This page is intentionally left blank.




6                                        © 2025 Johnson Controls. All rights reserved.
Form: 201.28-NM1.1
                                                                                                                                                      Table of Contents
Issue date: 12/22/2025


                                                                  Table of Contents
Section 1: General chiller information and safety. .............................................................................................13
     Introduction. .................................................................................................................................................... 13
     Warranty.......................................................................................................................................................... 13
     Quality assurance and safety.......................................................................................................................... 14
     Fluorinated greenhouse gases. ...................................................................................................................... 14
     Responsibility for safety.................................................................................................................................. 14
     About this manual. .......................................................................................................................................... 14
     Misuse of equipment....................................................................................................................................... 14


Section 2: Product description.............................................................................................................................17
     General system description. ........................................................................................................................... 17
     Semi-hermetic YORK twin-screw compressors.............................................................................................. 25
     Evaporator. ..................................................................................................................................................... 25
     Condenser. ..................................................................................................................................................... 25
     Refrigerant circuit............................................................................................................................................ 25
     Electrical. ........................................................................................................................................................ 25
     Building automation system capabilities. ........................................................................................................ 26
     Microcomputer control center. ........................................................................................................................ 26
     Accessories and options................................................................................................................................. 27
     Fan options. .................................................................................................................................................... 27
     Condenser coils. ............................................................................................................................................. 27


Section 3: Rigging, handling, and storage. .........................................................................................................31
     Lifting weights. ................................................................................................................................................ 31
     Delivery and storage....................................................................................................................................... 31
     Inspection........................................................................................................................................................ 32
     Moving the chiller............................................................................................................................................ 32
     Unit removal from shipping container. ............................................................................................................ 32
     Lifting using lugs. ............................................................................................................................................ 32
     Lifting using shackles...................................................................................................................................... 32


Section 4: Installation............................................................................................................................................41
     Location requirements. ................................................................................................................................... 41
     Outdoor installations. ...................................................................................................................................... 41
     Location clearances........................................................................................................................................ 41
     Vibration isolators............................................................................................................................................ 43
     Shipping braces. ............................................................................................................................................. 43
     Chilled liquid piping......................................................................................................................................... 43
     Evaporator pressure drop. .............................................................................................................................. 44
     Water treatment. ............................................................................................................................................. 46
     Pipework arrangement.................................................................................................................................... 46
     Minimum water volume................................................................................................................................... 46
     Leaving water temperature out of range......................................................................................................... 46
     Thermal storage.............................................................................................................................................. 47
     Variable primary flow ...................................................................................................................................... 47
     Connection types and sizes............................................................................................................................ 47


© 2025 Johnson Controls. All rights reserved.                                                                                                                             7
                                                                                                                                                 Form: 201.28-NM1.1
Table of Contents, continued
                                                                                                                                               Issue date: 12/22/2025


                                                    Table of Contents, continued

        Evaporator connections. ................................................................................................................................. 47
        Refrigerant relief valve piping. ........................................................................................................................ 49
        Electrical connection....................................................................................................................................... 49
        Power wiring. .................................................................................................................................................. 50
        Power supply wiring........................................................................................................................................ 50
        115 VAC control supply transformer................................................................................................................ 50
        Control wiring.................................................................................................................................................. 51
        Volts free contacts........................................................................................................................................... 51
        System inputs. ................................................................................................................................................ 51
        Power supply wiring........................................................................................................................................ 53
        Customer control wiring. ................................................................................................................................. 55
        Thermal dispersion flow switch connections................................................................................................... 57


Section 5: Technical data. .....................................................................................................................................72
     Elastomeric isolator installation....................................................................................................................... 99
     Elastomeric isolator specifications................................................................................................................ 100
     One inch deflection isolator installation......................................................................................................... 101
     One inch deflection spring isolator specifications. ........................................................................................102
     Two inch deflection, isolator installation and adjustment. ............................................................................. 103
     Two inch deflection, restrained spring isolator specifications. ...................................................................... 104


Section 6: Commissioning..................................................................................................................................106
     Preparation. .................................................................................................................................................. 106
     First time startup. .......................................................................................................................................... 109
     General operation . ....................................................................................................................................... 110


Section 7: Operation............................................................................................................................................ 117
     Operating controls......................................................................................................................................... 117
     Microboard Overview – IPU2........................................................................................................................ 117
     Microboard Overview – IPU3 ....................................................................................................................... 117
     Basic operating sequence............................................................................................................................. 121
     Power supplies and LEDs............................................................................................................................. 122
     Building automation system (BAS) communications. ................................................................................... 125
     E-Link or SC-EQ interface using YorkTalk Protocol. ..................................................................................... 126
     Program update / SD card features IPU2. .................................................................................................... 130
     Program update / SD card features IPU3. .................................................................................................... 131
     System Backup and Restore. ....................................................................................................................... 137
     Unit warning.................................................................................................................................................. 139
     Unit safeties. ................................................................................................................................................. 139
     System safeties, faults.................................................................................................................................. 141


Section 8: Micropanel..........................................................................................................................................147
     Unit data key................................................................................................................................................. 150
     System data keys 1 through 4. ..................................................................................................................... 152
     VSD data key................................................................................................................................................ 155



8                                                                                                                 © 2025 Johnson Controls. All rights reserved.
Form: 201.28-NM1.1
Issue date: 12/22/2025


                                                     Table of Contents, continued

        History key. ................................................................................................................................................... 158
        Setpoints key. ............................................................................................................................................... 165
        Program key.................................................................................................................................................. 167
        Options key................................................................................................................................................... 170
        Date/time and schedule keys........................................................................................................................ 173
        Manual override key...................................................................................................................................... 176
        Print key........................................................................................................................................................ 177
        System switches key..................................................................................................................................... 180


Section 9: Maintenance.......................................................................................................................................181
     General requirements. .................................................................................................................................. 181
     Checking system for leaks............................................................................................................................ 182
     System pressure test. ................................................................................................................................... 182
     System evacuation........................................................................................................................................ 185
     Vacuum dehydration. .................................................................................................................................... 185
     Dehydration................................................................................................................................................... 187
     Removing the refrigerant charge for service................................................................................................. 191
     Checking and trimming the refrigerant charge.............................................................................................. 191
     Checking the refrigerant charge during unit shutdown. ................................................................................ 192
     Draining the glycol liquid............................................................................................................................... 192
     Microchannel coil cleaning............................................................................................................................ 192
     Chilled liquid system maintenance................................................................................................................ 195
     Maintenance requirements for YVAA chillers................................................................................................ 197
     R-134a conversion table - pressure to saturated temperatures.................................................................... 201
     R-513A conversion table - pressure to saturated temperature . ................................................................... 202
     R-513A conversion table - temperature to equivalent pressure ................................................................... 203


Section 10: Decommissioning, dismantling, and disposal..............................................................................209
     Temperature.................................................................................................................................................. 210
     Notes............................................................................................................................................................. 211




© 2025 Johnson Controls. All rights reserved.                                                                                                                              9
                                                                                                                                               Form: 201.28-NM1.1
                                                                                                                                             Issue date: 12/22/2025




                                                                    List of Figures
Figure 1 - YVAA air-cooled screw liquid chiller with variable speed drive��������������������������������������������������������������� 17
Figure 4 - YVAA Piping and Instrumentation Diagram��������������������������������������������������������������������������������������������18
Figure 2 - Chiller control system�����������������������������������������������������������������������������������������������������������������������������24
Figure 3 - View of YORK control center user interface�������������������������������������������������������������������������������������������26
Figure 5 - Lifting lug������������������������������������������������������������������������������������������������������������������������������������������������32
Figure 6 - Lifting using lugs������������������������������������������������������������������������������������������������������������������������������������32
Figure 7 - Acceptable minimum clearances around and between units����������������������������������������������������������������� 42
Figure 8 - Two pass water pressure drop, English units�����������������������������������������������������������������������������������������45
Figure 9 - Three pass water pressure drop, English units��������������������������������������������������������������������������������������45
Figure 10 - Pipework arrangement�������������������������������������������������������������������������������������������������������������������������46
Figure 11 - Leaving water temperature out of range suggested layout������������������������������������������������������������������ 46
Figure 12 - Suggested layout for applications with a flow rate less than the evaporator minimum
             allowable flow rate��������������������������������������������������������������������������������������������������������������������������������47
Figure 13 - Suggested layout for applications with a flow rate greater than the evaporator maximum
             allowable flow rate��������������������������������������������������������������������������������������������������������������������������������47
Figure 14 - Grooved nozzle������������������������������������������������������������������������������������������������������������������������������������47
Figure 15 - Flange for GB vessels��������������������������������������������������������������������������������������������������������������������������49
Figure 16 - Flange attachment�������������������������������������������������������������������������������������������������������������������������������49
Figure 17 - Single point power wiring���������������������������������������������������������������������������������������������������������������������53
Figure 18 - Dual point power wiring������������������������������������������������������������������������������������������������������������������������54
Figure 19 - Customer control connections �������������������������������������������������������������������������������������������������������������55
Figure 20 - Single point kit connection ������������������������������������������������������������������������������������������������������������������56
Figure 21 - Thermal dispersion flow switch connections����������������������������������������������������������������������������������������57
Figure 22 - Reserved customer wiring entry ����������������������������������������������������������������������������������������������������������58
Figure 23 - Water box heater wiring box�����������������������������������������������������������������������������������������������������������������58
Figure 24 - YVAA dimensions���������������������������������������������������������������������������������������������������������������������������������91
Figure 25 - LED indicator buttons�������������������������������������������������������������������������������������������������������������������������107
Figure 26 - Flow switch set�����������������������������������������������������������������������������������������������������������������������������������108
Figure 27 - Flow below the representation range�������������������������������������������������������������������������������������������������108
Figure 28 - Flow exceeds the representation range���������������������������������������������������������������������������������������������108
Figure 29 - Keyboard and display������������������������������������������������������������������������������������������������������������������������� 117
Figure 30 - 331-03478-xxx microboard with IPU2 processor�������������������������������������������������������������������������������123
Figure 31 - 331-03478-xxx microboard with IPU3 microprocessor����������������������������������������������������������������������124
Figure 32 - SC-EQ Communication Card Connections for chillers with the 03478 microboard and
             IPU2 processor YCAV / YCIV / YVAA / YVWA / YVFA�����������������������������������������������������������������������128
Figure 33 - SC-EQ Communication Card Connections for chillers with the 03478 microboard and
             IPU3 processor YCAV / YCIV / YVAA / YVWA / YVFA�����������������������������������������������������������������������129
Figure 34 - Service connections���������������������������������������������������������������������������������������������������������������������������182
Figure 37 - Leak test hold times���������������������������������������������������������������������������������������������������������������������������183
Figure 35 - Evacuation of chiller operation�����������������������������������������������������������������������������������������������������������186
Figure 36 - Saturation curve���������������������������������������������������������������������������������������������������������������������������������187




10                                                                                                               © 2025 Johnson Controls. All rights reserved.
Form: 201.28-NM1.1
                                                                                                                                                        List of Tables
Issue date: 12/22/2025




                                                                     List of Tables
Table 1 - 035-24013-000 YVAA Piping and Instrumentation Legend����������������������������������������������������������������������20
Table 2 - Unit rigging�����������������������������������������������������������������������������������������������������������������������������������������������33
Table 3 - Minimum evaporator tube removal clearance������������������������������������������������������������������������������������������42
Table 4 - Evaporator connections dimensions��������������������������������������������������������������������������������������������������������48
Table 5 - Electrical lug data�������������������������������������������������������������������������������������������������������������������������������������60
Table 6 - Physical data - Round tube coil����������������������������������������������������������������������������������������������������������������77
Table 7 - Optional one-pass evaporator������������������������������������������������������������������������������������������������������������������79
Table 8 - Standard two-pass, rear inlet/outlet evaporator���������������������������������������������������������������������������������������83
Table 9 - Optional three-pass rear inlet/front outlet evaporator�������������������������������������������������������������������������������87
Table 10 - Isolator selection and mounting locations����������������������������������������������������������������������������������������������93
Table 11 - Values required for BAS communication: IPU2 only����������������������������������������������������������������������������127
Table 12 - Communication protocols and point mapping��������������������������������������������������������������������������������������128
Table 13 - Flash card update error XXXXX�����������������������������������������������������������������������������������������������������������130
Table 14 - Software update errors�������������������������������������������������������������������������������������������������������������������������132
Table 15 - Flash errors������������������������������������������������������������������������������������������������������������������������������������������132
Table 16 - Data logging IPU2 and IPU3����������������������������������������������������������������������������������������������������������������133
Table 17 - Low differential oil pressure cutout�������������������������������������������������������������������������������������������������������143
Table 18 - Discharge pressure load limiting/unloading����������������������������������������������������������������������������������������144
Table 19 - Suction pressure load limiting/unloading����������������������������������������������������������������������������������������������144
Table 20 - Start inhibit sensor thresholds��������������������������������������������������������������������������������������������������������������145
Table 21 - Sensor min/max outputs����������������������������������������������������������������������������������������������������������������������154
Table 22 - Compressor motor overload settings���������������������������������������������������������������������������������������������������156
Table 23 - Setpoint limits���������������������������������������������������������������������������������������������������������������������������������������166
Table 24 - Programmable operating parameters��������������������������������������������������������������������������������������������������169
Table 25 - Printout types���������������������������������������������������������������������������������������������������������������������������������������177
Table 26 - System pressures��������������������������������������������������������������������������������������������������������������������������������186
Table 27 - R-134a pressure to saturated temperature conversion������������������������������������������������������������������������189
Table 28 - R-513A pressure to saturated temperature conversion�����������������������������������������������������������������������189
Table 29 - Cleaning materials�������������������������������������������������������������������������������������������������������������������������������195
Table 30 - Troubleshooting guide��������������������������������������������������������������������������������������������������������������������������198
Table 31 - R-134a pressure to saturated temperature conversion������������������������������������������������������������������������201
Table 32 - R-513A refrigerant pressure to saturated temperature������������������������������������������������������������������������202
Table 33 - R-513A Refrigerant temperature to pressure���������������������������������������������������������������������������������������203
Table 34 - Temperature input voltage sensor (Measured signal to shield at the sensor)�������������������������������������� 204
Table 35 - Outside air temperature sensor input voltage, measured signal to shield at the sensor���������������������� 205
Table 36 - Pressure transducer output voltage, measured signal to return at the transducer������������������������������ 206
Table 37 - Motor temperature sensor resistance (Check at the motor)�����������������������������������������������������������������207
Table 38 - SI metric conversion�����������������������������������������������������������������������������������������������������������������������������210




© 2025 Johnson Controls. All rights reserved.                                                                                                                       11
                                                                  Form: 201.28-NM1.1
                                                                Issue date: 12/22/2025




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12                                        © 2025 Johnson Controls. All rights reserved.
Form: 201.28-NM1.1
Issue date: 12/22/2025


                         Section 1: General chiller information and safety                                            1
Introduction                                                Warranty
YORK® YVAA chillers are manufactured to the highest         Johnson Controls warrants YVAA chillers in
design and construction standards to ensure high            accordance with the Limited Warranty Engineered
performance, reliability and adaptability to all types of   Systems Equipment procedure. Refer to Form 50.05-
air conditioning installations.                             NM2.
The unit is intended for cooling water or glycol            Johnson Controls warrants all equipment and
solutions and is not suitable for purposes other than       materials against defects in workmanship and materials
those specified in this manual.                             for a period of eighteen months from date of shipment
                                                            or 12 months from date of startup, whichever comes
Rigging and lifting should only be done by a                first, unless labor or extended warranty has been
professional rigger in accordance with a written            purchased as part of the contract. The warranty is
rigging and lifting plan. The most appropriate rigging      limited to parts only replacement and shipping of any
and lifting method will depend on job specific factors,     faulty part, or sub-assembly, which has failed due to
such as the rigging equipment available and site needs.     poor quality or manufacturing errors. All claims must
Therefore, a professional rigger must determine the         be supported by evidence that the failure has occurred
rigging and lifting method to be used, and it is beyond     within the warranty period, and that the unit has been
the scope of this manual to specify rigging and lifting     operated within the designed parameters specified.
details.
                                                            All warranty claims must specify the unit model,
               The rigger should locate the center of       serial number, order number and run hours/starts. Model
               gravity through trial lifts to account       and serial number information is printed on the unit
               for possible variations in unit configu-     identification plate.
               rations. Contact your nearest Johnson
               Controls sales office for weight data. See   The unit warranty will be void if any modification to
               Section 3: Rigging, handling, and storage    the unit is carried out without prior written approval
               for more details.                            from Johnson Controls. For warranty purposes, the
                                                            following conditions must be satisfied:

This manual contains all the information required for         • The initial start of the unit must be carried
correct installation and commissioning of the unit,             out by trained personnel from an authorized
together with operating and maintenance instructions.           Johnson Controls Service Center. See Section 6:
The manual should be read thoroughly before                     Commissioning for more information.
attempting to operate or service the unit.                    • Only genuine YORK approved spare parts, oils,
All procedures detailed in the manual, including                coolants, and refrigerants must be used.
installation, commissioning and maintenance tasks             • All the scheduled maintenance operations detailed
must only be performed by suitably trained and                  in this manual must be performed at the specified
qualified personnel.                                            times by suitably trained and qualified personnel.
The manufacturer will not be liable for any                     See Section 9: Maintenance for more information.
injury or damage caused by incorrect installation,            • Failure to satisfy any of these conditions will
commissioning, operation or maintenance resulting               automatically void the warranty. Refer to
from a failure to follow the procedures and instructions        Form 50.05-NM2 for complete details.
detailed in the manual.




© 2025 Johnson Controls. All rights reserved.                                                                   13
                                                                                                   Form: 201.28-NM1.1
Section 1: General chiller information and safety
                                                                                                 Issue date: 12/22/2025


Quality assurance and safety                              Fluorinated greenhouse gases
YVAA chillers are designed within EN ISO 9001 and           • This equipment contains fluorinated greenhouse
built within an EN ISO 9002 accredited manufacturing          gases covered by the Kyoto Protocol.
organization.                                               • The global warming potential of the refrigerant
Units conform with the following European Directives:         R134a is 1300. The global warming potential for
                                                              R513A is 546. Both use the integrated time of 100
     • Machinery Directive (2006/42/EC)                       years based on IPCC 5th report 2013, Table 8.A.1.
     • EMC Directive (2004/108/EC)                          • The refrigerant quantity is as stated                  in
                                                              Table 5 on page 60 of this document.
     • Pressure Equipment Directive (97/23/EC)
                                                            • The fluorinated greenhouse gases in this equip-
     • Low Voltage Directive (2006/95/EC)                     ment may not be vented to the atmosphere.
     • Safety Code for Mechanical Refrigeration             • This equipment should only be serviced by
       (EN378-2(2008))                                        qualified technicians.
CE/PED marked units conform to the following
standards:                                                Responsibility for safety
                                                          Every care has been taken in the design and manufac-
     • Machinery Directive (2006/42/EC).
                                                          ture of the unit to ensure compliance with the safety
     • EMC Directive (2004/108/EC).                       requirements listed above. However, the individual
                                                          rigging, lifting, maintaining, operating or working on
     • Pressure Equipment Directive (97/23/EC).           any machinery is primarily responsible for:
     • Low Voltage Directive (2006/95/EC).
                                                            • Personal safety, safety of other personnel, and the
     • Safety Code for Mechanical Refrigeration               machinery.
       (EN378-2(2008)).                                     • Correct utilization of the machinery in accordance
ETL/ASME marked units conform to the following                with the procedures detailed in the manual.
standards:
                                                          About this manual
     • ANSI/ASHRAE 15 – Safety Code for
                                                          The contents of this manual include suggested best
       Mechanical Refrigeration.
                                                          working practices and procedures. These are issued for
     • ANSI/ASHRAE 34 – Number Designation and            guidance only, and they do not take precedence over
       Safety Classification of Refrigerants.             the above stated individual responsibility and/or local
     • ANSI/NFPA 70 – National Electrical Code            safety regulations.
       (NEC).                                             This manual and any other document supplied with
     • ASME Boiler and Pressure Vessel Code, Section      the unit are the property of Johnson Controls which re-
       VIII, Division 1.                                  serves all rights. They may not be reproduced, in whole
                                                          or in part, without prior written authorization from an
GB marked units conform to the following standards:
                                                          authorized Johnson Controls representative.
     • GB5226.1 Safety of machinery- Electrical equip-
       ment of machines – Part 1: General requirements.   Misuse of equipment
     • GB25131 Safety requirements for water chiller      Suitability for Application
       (heat pump) using the vapor compression cycle.     The unit is intended for cooling water or glycol solu-
                                                          tions and is not suitable for purposes other than those
                                                          specified in these instructions. Any use of the equip-
                                                          ment other than its intended use, or operation of the
                                                          equipment contrary to the relevant procedures may re-
                                                          sult in injury to the operator, or damage to the equip-
                                                          ment.


14                                                                         © 2025 Johnson Controls. All rights reserved.
Form: 201.28-NM1.1
                                                                             Section 1: General chiller information and safety
Issue date: 12/22/2025


The unit must not be operated outside the design pa-         to be used on a low-voltage public network which sup-
rameters specified in this manual.                           plies domestic premises. Radio frequency interference               1
                                                             may occur if it is used on a low voltage public network.
Structural support
                                                             This equipment equipped with VSD, may generate
Structural support of the unit must be provided as in-
                                                             conducted and radiated disturbances, which may inter-
dicated in these instructions. Failure to provide proper
                                                             fere with or damage susceptible connected apparatus.
support may result in injury to the operator, or damage
to the equipment and/or building.                            Generally accepted engineering standards and practic-
                                                             es should be followed to ensure trouble-free and EMC
Mechanical strength                                          compliant electrical installation. Installations must
The unit is not designed to withstand loads or stresses      be supervised or completed by a competent person in
from adjacent equipment, pipework or structures. Ad-         accordance with EN 13313.
ditional components must not be mounted on the unit.
                                                             Special considerations depending on the application:
Any such extraneous loads may cause structural failure
and may result in injury to the operator, or damage to         • Industry standard grounding or earthing

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