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Air-cooled variable-speed screw chiller (via E-Link gateway) · BACnet points list
York YVAA / YVFA / YAGK E-Link (YorkTalk 2) BACnet points list
Updated 28 October 2026
Before the SC-EQ card, YORK by Johnson Controls YVAA-family chillers reached a BAS through the E-Link gateway, which reads the microboard over YorkTalk 2 (4800 baud) and serves BACnet, N2, LON and Modbus objects. Objects are named by YorkTalk page (YT2_S01_P03 and so on). Section 1 holds the remote commands and core chiller data; section 2 (instances from 101) holds free cooling, Aggreko, power and option points that depend on the microboard program.
This page lists 114 BACnet objects for the York YVAA / YVFA / YAGK E-Link (YorkTalk 2) — 5 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from York’s own free documentation, linked below.
- Manufacturer
- York
- Model
- YVAA / YVFA / YAGK E-Link (YorkTalk 2)
- Equipment
- Air-cooled variable-speed screw chiller (via E-Link gateway)
- Equipment type
- Chillers
- BACnet objects
- 114 (5 writable)
- Transport
- —
- Firmware
- C.ACS.20.03 / Y.ACS.20.01 to Y.ACS.20.18 (chiller program)
- Also known as
- YORK YVAA, YORK YVFA, YAGK, E-Link, eLink, YorkTalk 2, 031-02478, 031-03478
BMS integration notes: York YVAA / YVFA / YAGK E-Link (YorkTalk 2)
Put the chiller in remote control (BV 20 reads Remote), then start/stop it with BV 1 and write the remote setpoint (AV 1) and current limit (AV 2) through the E-Link. Read BV 5 for chiller run, the leaving chilled liquid temperature and VSD frequency, and BV 6 for the chiller alarm.
Minimum points to map
The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.
| Object | Name | Why | Access |
|---|---|---|---|
| BV 1 | YT2_S01_P07 | Remote start/stop (1 = run) | Write |
| AV 1 | YT2_S01_P03 | Remote leaving chilled liquid setpoint | Write |
| AV 2 | YT2_S01_P04 | Remote current limit, % | Write |
| BV 20 | YT2_S01_P51 | Must read Remote (1) for BMS control | Read |
| BV 5 | YT2_S01_P36 | Chiller running | Read |
| AV 5 | YT2_S01_P11 | Leaving chilled liquid temperature | Read |
| AV 27 | YT2_S01_P33 | Compressor VSD frequency (load indication) | Read |
| BV 6 | YT2_S01_P37 | Chiller alarm (1 = alarm) | Read |
Enable & remote start
BV 20 shows Local or Remote control mode. The sheet gives no point to change it and no write-enable point.
Heartbeat & communication loss
Operational code 67 is 'Loss of External Communications'; the sheet gives no timeout or heartbeat point.
Network setup
- The E-Link talks to the chiller microboard over YorkTalk 2 at 4800 baud for every program version listed.
- LON needs the LON version of the E-Link (SNVT_count_f and SNVT_switch only).
Watch out for
- BV 4 switches the data between live values and history buffer 1; leave it at 0 for live data.
- The E-Link publishes every possible chiller point, even ones that don't apply to the unit (per the SC-EQ install guide).
- Replacing an E-Link with an SC-EQ changes the object names; the SC-EQ guide says to delete the E-Link device and re-discover.
York YVAA / YVFA / YAGK E-Link (YorkTalk 2) BACnet objects
Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AVmin | 1 | YT2_S01_P03 | Remote Setpoint | °F | Write | |
| AVmin | 2 | YT2_S01_P04 | Remote Current Limit Setpoint | % | Write | |
| AV | 3 | YT2_S01_P05 | Remote Sound Limit | % | Write | |
| BVmin | 1 | YT2_S01_P07 | Remote Start/Stop Command | Write | 0=Stop, 1=Run | |
| BV | 4 | YT2_S01_P10 | History buffer 1 request (0 = live data, 1 = history data) | Write | 0=Live Data, 1=History 1 Data | |
| AVmin | 5 | YT2_S01_P11 | Leaving Chilled Liquid Temp | °F | Read | |
| AV | 6 | YT2_S01_P12 | Entering Chilled Liquid Temp | °F | Read | |
| AV | 7 | YT2_S01_P13 | VSD Internal Ambient Temp | °F | Read | |
| AV | 8 | YT2_S01_P14 | Sys 1 Condenser Temperature | °F | Read | |
| AV | 9 | YT2_S01_P15 | Sys 1 Discharge Temperature | °F | Read | |
| AV | 10 | YT2_S01_P16 | Outside Ambient Air Temperature | °F | Read | |
| AV | 11 | YT2_S01_P17 | Sys 1 Eductor Temperature (Aggreko disabled) | °F | Read | |
| AV | 12 | YT2_S01_P18 | Sys 1 Oil Pressure | PSI | Read | |
| AV | 13 | YT2_S01_P19 | Sys 1 Suction Pressure | PSI | Read | |
| AV | 14 | YT2_S01_P20 | Sys 1 Discharge Pressure | PSI | Read | |
| AV | 15 | YT2_S01_P21 | Sys 1 Compressor % Full Load Amps | % | Read | |
| AV | 16 | YT2_S01_P22 | Sys 1 Total Run Hours | Read | ||
| AV | 17 | YT2_S01_P23 | Sys 1 Total Number of Starts | Read | ||
| AV | 18 | YT2_S01_P24 | Sys 1 Highest Motor Temp | °F | Read | |
| AV | 19 | YT2_S01_P25 | Sys 2 Highest Motor Temp | °F | Read | |
| AV | 20 | YT2_S01_P26 | Sys 2 Eductor Temperature (Aggreko disabled) | °F | Read | |
| AV | 21 | YT2_S01_P27 | Sys 2 Oil Pressure | PSI | Read | |
| AV | 22 | YT2_S01_P28 | Sys 2 Suction Pressure | PSI | Read | |
| AV | 23 | YT2_S01_P29 | Sys 2 Discharge Pressure | PSI | Read | |
| AV | 24 | YT2_S01_P30 | Sys 2 Compressor % Full Load Amps | % | Read | |
| AV | 25 | YT2_S01_P31 | Sys 2 Total Run Hours | Read | ||
| AV | 26 | YT2_S01_P32 | Sys 2 Total Number of Starts | Read | ||
| AVmin | 27 | YT2_S01_P33 | VSD Output Frequency | Hz | Read | |
| AV | 28 | YT2_S01_P34 | Sys 1 Condenser Drain Valve % Open | % | Read | |
| AV | 29 | YT2_S01_P35 | Sys 2 Condenser Drain Valve % Open | % | Read | |
| BVmin | 5 | YT2_S01_P36 | Chiller Run | Read | ||
| BVmin | 6 | YT2_S01_P37 | Chiller Alarm | Read | 0=No Alarm, 1=Alarm | |
| BV | 7 | YT2_S01_P38 | Evaporator Heater Status | Read | ||
| BV | 8 | YT2_S01_P39 | Evaporator Pump Status | Read | ||
| BV | 9 | YT2_S01_P40 | Sys 1 Compressor Run Status | Read | ||
| BV | 10 | YT2_S01_P41 | Sys 2 Compressor Run Status | Read | ||
| BV | 11 | YT2_S01_P42 | Sys 1 VI Step Solenoid Valve 1 Status | Read | ||
| BV | 12 | YT2_S01_P43 | Sys 2 VI Step Solenoid Valve 1 Status | Read | ||
| BV | 13 | YT2_S01_P44 | Sys 1 VI Step Solenoid Valve 2 Status | Read | ||
| BV | 14 | YT2_S01_P45 | Sys 2 VI Step Solenoid Valve 2 Status | Read | ||
| BV | 19 | YT2_S01_P50 | Cooling Type | Read | 0=Water, 1=Glycol | |
| BVmin | 20 | YT2_S01_P51 | Local Remote Control Mode | Read | 0=Local, 1=Remote | |
| BV | 21 | YT2_S01_P52 | Display Units | Read | 0=Imperial, 1=SI | |
| MV | 1 | YT2_S01_P56 | Sys 1 Operational Code | Read | 63=Manual Override, 64=Daily Schedule Shutdown, 65=Unit Switch Off, 66=Remote Controlled Shutdown, 67=Loss of External Communications, 68=Flow Switch Shutdown, 69=VSD Cooling Shutdown, 70=Serial Number Shutdown, 72=Discharge Superheat Recovery (Remote Evaporator), 74=No Run Permissive, 75=Anti-Recycle Timer Active, 76=System Switch Off, 77=System Not Running, 78=System Running, 79=Discharge Pressure Limiting, 80=Suction Pressure Limiting, 81=Motor Current Limiting, 82=Free Cooling, 83=BAS/ISN Motor Current Limiting, 84=Remote Motor Current Limiting, 85=System Shutting Down, 86=VSD Precharging, 87=VSD Baseplate Temp Limiting, 88=VSD Internal Ambient Temp Limiting, 89=Sound Limiting, 90=BAS/ISN Sound Limiting, 91=Remote Sound Limiting, 92=Pulldown Motor Current Limiting, 93=Cooling Demand Shutdown, 94=Input Current Limiting, 95=ISN Input Current Limiting, 96=Remote Input Current Limiting, 97=Pulldown Input Current Limiting | |
| MV | 2 | YT2_S01_P57 | Sys 1 Fault Code | Read | 0=No Fault Code, 1=Low Ambient Temperature, 2=High Ambient Temperature, 3=Low Chilled Liquid Temperature, 4=VSD Initialization Failure, 5=Low RTC Battery Voltage, 6=Invalid Number of Compressors Selected, 7=VSD Communications Failure, 8=Precharge Low DC Bus Voltage (Unit), 9=Precharge DC Bus Voltage Imbalance (Unit), 10=High DC Bus Voltage (Unit), 11=Low DC Bus Voltage (Unit), 12=DC Bus Voltage Imbalance (Unit), 13=High VSD Ambient Temperature, 14=Single Phase Input (Unit), 15=VSD Power Supply Fault, 16=VSD Logic Board Fault, 17=Motor Current Overload (Hardware), 18=CT Plug Fault, 19=High Harmonic Filter Temperature, 20=Evap Anti-Freeze Pump Fault, 21=Low Heat Exchanger Temperature, 27=High Discharge Pressure (Software), 28=High Differential Oil Pressure, 29=Low Differential Oil Pressure, 30=Low Suction Pressure, 31=High Discharge Temperature, 33=Eductor Clog Fault, 34=Sensor Failure, 35=Low Motor Current, 36=High Motor Temperature, 37=Precharge Low DC Bus Voltage (System, Frame E/F), 38=Precharge DC Bus Voltage Imbalance (System, Frame E/F), 39=High DC Bus Voltage (System, Frame E/F), 40=Low DC Bus Voltage (System, Frame E/F), 41=DC Bus Voltage Imbalance (System, Frame E/F), 42=High Motor Current, 43=Motor Current Overload (Software), 44=IGBT Gate Driver Fault, 45=High Baseplate Temperature, 46=Single Phase Input (System, Frame E/F), 47=VSD Run Signal Fault, 48=High Discharge Pressure (Hardware/HPCO), 49=Low Suction Suerheat, 50=Control Voltage Fault, 51=Low Discharge Superheat, 52=Low Suction Pressure Smart Freeze, 53=Isolation Valve Failed to Close Warning, 54=Isolation Valve Failed to Open Fault, 55=High Discharge Pressure Rate, 56=Condenser Fan VSD Warning | |
| MV | 3 | YT2_S01_P58 | Sys 2 Operational Code | Read | 63=Manual Override, 64=Daily Schedule Shutdown, 65=Unit Switch Off, 66=Remote Controlled Shutdown, 67=Loss of External Communications, 68=Flow Switch Shutdown, 69=VSD Cooling Shutdown, 70=Serial Number Shutdown, 72=Discharge Superheat Recovery (Remote Evaporator), 74=No Run Permissive, 75=Anti-Recycle Timer Active, 76=System Switch Off, 77=System Not Running, 78=System Running, 79=Discharge Pressure Limiting, 80=Suction Pressure Limiting, 81=Motor Current Limiting, 82=Free Cooling, 83=BAS/ISN Motor Current Limiting, 84=Remote Motor Current Limiting, 85=System Shutting Down, 86=VSD Precharging, 87=VSD Baseplate Temp Limiting, 88=VSD Internal Ambient Temp Limiting, 89=Sound Limiting, 90=BAS/ISN Sound Limiting, 91=Remote Sound Limiting, 92=Pulldown Motor Current Limiting, 93=Cooling Demand Shutdown, 94=Input Current Limiting, 95=ISN Input Current Limiting, 96=Remote Input Current Limiting, 97=Pulldown Input Current Limiting | |
| MV | 4 | YT2_S01_P59 | Sys 2 fault code (sheet labels it Sys 1) | Read | 0=No Fault Code, 1=Low Ambient Temperature, 2=High Ambient Temperature, 3=Low Chilled Liquid Temperature, 4=VSD Initialization Failure, 5=Low RTC Battery Voltage, 6=Invalid Number of Compressors Selected, 7=VSD Communications Failure, 8=Precharge Low DC Bus Voltage (Unit), 9=Precharge DC Bus Voltage Imbalance (Unit), 10=High DC Bus Voltage (Unit), 11=Low DC Bus Voltage (Unit), 12=DC Bus Voltage Imbalance (Unit), 13=High VSD Ambient Temperature, 14=Single Phase Input (Unit), 15=VSD Power Supply Fault, 16=VSD Logic Board Fault, 17=Motor Current Overload (Hardware), 18=CT Plug Fault, 19=High Harmonic Filter Temperature, 20=Evap Anti-Freeze Pump Fault, 21=Low Heat Exchanger Temperature, 27=High Discharge Pressure (Software), 28=High Differential Oil Pressure, 29=Low Differential Oil Pressure, 30=Low Suction Pressure, 31=High Discharge Temperature, 33=Eductor Clog Fault, 34=Sensor Failure, 35=Low Motor Current, 36=High Motor Temperature, 37=Precharge Low DC Bus Voltage (System, Frame E/F), 38=Precharge DC Bus Voltage Imbalance (System, Frame E/F), 39=High DC Bus Voltage (System, Frame E/F), 40=Low DC Bus Voltage (System, Frame E/F), 41=DC Bus Voltage Imbalance (System, Frame E/F), 42=High Motor Current, 43=Motor Current Overload (Software), 44=IGBT Gate Driver Fault, 45=High Baseplate Temperature, 46=Single Phase Input (System, Frame E/F), 47=VSD Run Signal Fault, 48=High Discharge Pressure (Hardware/HPCO), 49=Low Suction Suerheat, 50=Control Voltage Fault, 51=Low Discharge Superheat, 52=Low Suction Pressure Smart Freeze, 53=Isolation Valve Failed to Close Warning, 54=Isolation Valve Failed to Open Fault, 55=High Discharge Pressure Rate, 56=Condenser Fan VSD Warning | |
| MV | 5 | YT2_S01_P60 | Sys 1 Condenser Fan Stage | Read | ||
| MV | 6 | YT2_S01_P61 | Sys 1 Condenser Fan Speed | Read | ||
| MV | 7 | YT2_S01_P62 | Sys 2 Condenser Fan Stage | Read | ||
| MV | 8 | YT2_S01_P63 | Sys 2 Condenser Fan Speed | Read | ||
| MV | 9 | YT2_S01_P64 | Lead System Number | Read | ||
| AV | 30 | YT2_S01_P66 | Local Leaving Chilled Liquid Setpoint | °F | Read | |
| AV | 31 | YT2_S01_P67 | Low Leaving Chilled Liquid Temp Cutout | °F | Read | |
| AV | 32 | YT2_S01_P68 | Sys 1 Economizer Valve % Open | % | Read | |
| AV | 33 | YT2_S01_P69 | Sys 2 Economizer Valve % Open | % | Read | |
| AV | 34 | YT2_S01_P70 | Low Suction Pressure Cutout | PSI | Read | |
| AV | 35 | YT2_S01_P71 | VSD DC Bus Voltage | Volts | Read | |
| AV | 36 | YT2_S01_P72 | Remote Leaving Chilled Liquid Setpoint | °F | Read | |
| AV | 37 | YT2_S01_P73 | Sys 1 subcooling (microchannel) or condenser level (round tube) | °F (diff) / % | Read | |
| AV | 38 | YT2_S01_P74 | Cooling Range | °F | Read | |
| AV | 39 | YT2_S01_P75 | Sys 1 Discharge Superheat | °F (diff) | Read | |
| AV | 40 | YT2_S01_P76 | Sys 2 Condenser Temperature | °F | Read | |
| AV | 41 | YT2_S01_P77 | Sys 2 Discharge Temperature | °F | Read | |
| AV | 42 | YT2_S01_P78 | Sys 2 subcooling (microchannel) or condenser level (round tube) | °F (diff) / % | Read | |
| AV | 43 | YT2_S01_P79 | Sys 2 Discharge Superheat | °F (diff) | Read | |
| BV | 25 | YT2_S01_P80 | Sys 1 Lockout | Read | ||
| BV | 26 | YT2_S01_P81 | Sys 2 Lockout | Read | ||
| BV | 27 | YT2_S01_P82 | Flow Switch Status | Read | ||
| BV | 29 | YT2_S01_P84 | SCC Auto Detect Available | Read | ||
| AV | 105 | YT2_S02_P11 | Evaporator Entering Liquid Temp (Free Cooling) | °F | Read | |
| AV | 106 | YT2_S02_P12 | Cooling coil temperature (free cooling closed loop) or unit input current | °F / - | Read | |
| AV | 107 | YT2_S02_P13 | Heat Exchanger Leaving Temp (Free Cooling Closed Loop) | °F | Read | |
| AV | 108 | YT2_S02_P14 | Heat Exchanger Entering Temp (Free Cooling Closed Loop) | °F | Read | |
| AV | 109 | YT2_S02_P15 | Glycol Pump Speed (Free Cooling Closed Loop) | % | Read | |
| AV | 110 | YT2_S02_P16 | Cooling Coil Valve (Free Cooling Closed Loop) | % | Read | |
| AV | 111 | YT2_S02_P17 | Cooling Coil Bypass Valve (Free Cooling Closed Loop) | % | Read | |
| AV | 112 | YT2_S02_P18 | Sys 1 Suction Temperature (Aggreko) | °F | Read | |
| AV | 113 | YT2_S02_P19 | Sys 1 Sat Suction Temperature (Aggreko) | °F | Read | |
| AV | 114 | YT2_S02_P20 | Sys 1 Suction Superheat (Aggreko) | °F (diff) | Read | |
| AV | 115 | YT2_S02_P21 | Sys 1 flash tank drain valve % (Aggreko) | % | Read | |
| AV | 116 | YT2_S02_P22 | Sys 2 Suction Temperature (Aggreko) | °F | Read | |
| AV | 117 | YT2_S02_P23 | Sys 2 Sat Suction Temperature (Aggreko) | °F | Read | |
| AV | 118 | YT2_S02_P24 | Sys 2 Suction Superheat (Aggreko) | °F (diff) | Read | |
| AV | 119 | YT2_S02_P25 | Sys 2 flash tank drain valve % (Aggreko) | % | Read | |
| AV | 127 | YT2_S02_P33 | VSD Command Frequency | Hz | Read | |
| BV | 105 | YT2_S02_P36 | Option Indicator | Read | 0=Disabled, 1=Enabled | |
| BV | 106 | YT2_S02_P37 | Free cooling valve (free cooling open loop) | Read | 0=Off, 1=On | |
| BV | 107 | YT2_S02_P38 | Soft Shutdown | Read | 0=Disabled, 1=Enabled | |
| BV | 108 | YT2_S02_P39 | Remote Evaporator | Read | 0=Disabled, 1=Enabled | |
| BV | 109 | YT2_S02_P40 | Quick Start | Read | 0=Disabled, 1=Enabled | |
| BV | 111 | YT2_S02_P42 | Glycol pump run (free cooling closed loop) | Read | 0=Off, 1=On | |
| BV | 112 | YT2_S02_P43 | Glycol heater (free cooling closed loop) | Read | 0=Off, 1=On | |
| BV | 117 | YT2_S02_P48 | Frame E/F | Read | 0=Disabled, 1=Enabled | |
| BV | 118 | YT2_S02_P49 | Sound Limit Option | Read | 0=Disabled, 1=Enabled | |
| BV | 119 | YT2_S02_P50 | SCC Auto Detect Digit 1 | Read | ||
| BV | 120 | YT2_S02_P51 | SCC Auto Detect Digit 2 | Read | ||
| BV | 121 | YT2_S02_P52 | SCC Auto Detect Digit 3 | Read | ||
| BV | 122 | YT2_S02_P53 | SCC Auto Detect Digit 4 | Read | ||
| BV | 123 | YT2_S02_P54 | SCC Auto Detect Digit 5 | Read | ||
| BV | 124 | YT2_S02_P55 | SCC Auto Detect Digit 6 | Read | ||
| MV | 101 | YT2_S02_P56 | Condenser Fan Control Type | Read | 1=Std. VSD, 2=Opt. VSD, 3=Std. Staged, 4=Opt. Staged | |
| MV | 102 | YT2_S02_P57 | Free cooling mode (free cooling option) | Read | 0=Mechanical, 1=Free cooling, 2=Hybrid | |
| MV | 103 | YT2_S02_P58 | Free cooling control programmed (free cooling option) | Read | 0=Disabled, 1=OL, 2=CL | |
| MV | 104 | YT2_S02_P59 | Sys 1 System State | Read | 0=Stopped, 1=Running, 2=Faulted, 4=Locked Out, 5=Pre-Run | |
| MV | 105 | YT2_S02_P60 | Sys 2 System State | Read | 0=Stopped, 1=Running, 2=Faulted, 4=Locked Out, 5=Pre-Run | |
| MV | 106 | YT2_S02_P61 | Sys 1 Warning Code | Read | 0=No Warning Set, 1=Quarterly Service Required - Contact JCI, 2=Yearly Service Required - Contact JCI, 3=3 Year Service Required - Contact JCI, 4=5 Year Service Required - Contact JCI, 5=Replace Oil Filter | |
| MV | 107 | YT2_S02_P62 | Sys 2 Warning Code | Read | 0=No Warning Set, 1=Quarterly Service Required - Contact JCI, 2=Yearly Service Required - Contact JCI, 3=3 Year Service Required - Contact JCI, 4=5 Year Service Required - Contact JCI, 5=Replace Oil Filter | |
| AV | 131 | YT2_S02_P67 | Sys 1 Fan Kw | Read | ||
| AV | 132 | YT2_S02_P68 | Sys 1 Compressor Kw | Read | ||
| AV | 133 | YT2_S02_P69 | Sys 2 Fan Kw | Read | ||
| AV | 134 | YT2_S02_P70 | Sys 2 Compressor Kw | Read | ||
| AV | 135 | YT2_S02_P71 | DC Bus Voltage 2 (Frame E/F) | Volts | Read | |
| BV | 129 | YT2_S02_P84 | Units | Read | 0=Imperial, 1=Metric |
No points match these filters.
Integration notes
- Object names are the E-Link's YorkTalk page names, not plain-language names; the descriptions say what each one is.
- Access follows the sheet's Modbus function note: the first eight objects (AV 1-4, BV 1-4) accept writes; the rest are read-only.
- The sheet lists ten chiller program versions with a Standard/Optional/Not available code per point; points marked not available on every version are left out, and many section-2 points only exist on newer programs or with options.
- Multistate states are shown as printed (code tables and most enums from 0); the sheet says nothing about adding 1. BACnet multistate values start at 1, so the device may report the printed number + 1; confirm by discovery (read the state text).
- The sheet lists BACnet objects but does not name the BACnet transport (MS/TP or IP); check the E-Link setup. The SC-EQ card replaces the E-Link (see the YVAA Style B SC-EQ list).
- Units shown are imperial; SI units are in the sheet.
Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the YVAA / YVFA / YAGK E-Link (YorkTalk 2) and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.
Questions about the York YVAA / YVFA / YAGK E-Link (YorkTalk 2)
How many BACnet points does the York YVAA / YVFA / YAGK E-Link (YorkTalk 2) have?
This list has 114 BACnet objects: 63 analog values, 35 binary values, 16 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which York YVAA / YVFA / YAGK E-Link (YorkTalk 2) BACnet points are writable?
5 of the 114 objects accept a write. Points marked Command have a priority array: a write holds until it is released, so release it back to automatic when you are done.
Where is the official York YVAA / YVFA / YAGK E-Link (YorkTalk 2) BACnet documentation?
The source is YVAA, YVFA, YAGK York Talk 2 (E-Link) points list, boards 031-02478 / 031-03478, revision 2021-04-16 (program Y.ACS.20.18), published free by York at https://docs.johnsoncontrols.com/chillers/api/khub/documents/HryI9wyjlbuFpbuVIk9XrA/content.
What are the minimum BACnet points to integrate the York YVAA / YVFA / YAGK E-Link (YorkTalk 2)?
Start with BV 1 YT2_S01_P07 (Remote start/stop (1 = run)); AV 1 YT2_S01_P03 (Remote leaving chilled liquid setpoint); AV 2 YT2_S01_P04 (Remote current limit, %); BV 20 YT2_S01_P51 (Must read Remote (1) for BMS control); BV 5 YT2_S01_P36 (Chiller running); AV 5 YT2_S01_P11 (Leaving chilled liquid temperature); AV 27 YT2_S01_P33 (Compressor VSD frequency (load indication)); BV 6 YT2_S01_P37 (Chiller alarm (1 = alarm)).
How do I enable BMS control of the York YVAA / YVFA / YAGK E-Link (YorkTalk 2)?
BV 20 shows Local or Remote control mode. The sheet gives no point to change it and no write-enable point.
Does the York YVAA / YVFA / YAGK E-Link (YorkTalk 2) need a BACnet heartbeat or have a communication timeout?
Operational code 67 is 'Loss of External Communications'; the sheet gives no timeout or heartbeat point.
How do I check these points on the real YVAA / YVFA / YAGK E-Link (YorkTalk 2)?
Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.
More York BACnet points lists
- Air-cooled variable-speed screw chiller
York YCAV / YCIV Air-Cooled Screw Chiller (native BACnet MS/TP)
YORK YCAV and YCIV air-cooled variable-speed screw chillers (up to four refrigerant systems) with the 031-03478 microboard and its native BAS port.
Also known as: YORK YCAV, YORK YCIV, 031-03478, YCAV_IV Native, Latitude - Water-cooled dual-compressor centrifugal chiller (via SC-EQ card)
York YD Dual-Compressor Centrifugal Chiller (SC-EQ)
YORK by Johnson Controls YD water-cooled centrifugal chillers with two compressors, fitted with the SC-EQ communication card.
Also known as: YD, YORK YD, SC-EQ, SC-EQUIP, SE-SCC1001-1, OptiView - Water-cooled centrifugal chiller (via SC-EQ card)
York YK Centrifugal Chiller (SC-EQ)
YORK by Johnson Controls YK water-cooled centrifugal chillers (OptiView panel) fitted with the SC-EQ communication card.
Also known as: YK, YORK YK, SC-EQ, SC-EQUIP, SE-SCC1001-1, OptiView - Water-cooled centrifugal chiller with economizer compressor (via SC-EQ card)
York YK-EP Centrifugal Chiller (SC-EQ)
YORK by Johnson Controls YK-EP (Efficiency Plus) water-cooled centrifugal chillers, which pair the main compressor with an economizer compressor, fitted with the SC-EQ communication card.
Also known as: YK-EP, YKEP, YK EP, YK-EP Efficiency Plus, SC-EQ, SC-EQUIP, SE-SCC1001-1 - Air-to-water modular heat pump (four-pipe)
York YMAE Four-Pipe Modular Heat Pump
YORK YMAE air-to-water modular heat pumps with inverter compressors in the four-pipe (simultaneous heating and cooling) version.
Also known as: YORK YMAE, YMAE-130, YMAE four pipe, air-to-water heat pump - Water-cooled magnetic-bearing centrifugal chiller (via SC-EQ card)
York YMC2 Magnetic-Bearing Centrifugal Chiller (SC-EQ)
YORK by Johnson Controls YMC2 oil-free, magnetic-bearing centrifugal chillers with a variable speed drive, fitted with the SC-EQ communication card.
Also known as: YMC2, YORK YMC2, YMC², SC-EQ, SC-EQUIP, SE-SCC1001-1 - Steam-turbine-driven centrifugal chiller (via SC-EQ card)
York YST Steam Turbine Chiller (SC-EQ)
YORK YST steam-turbine-driven centrifugal chillers fitted with the SC-EQ communication card.
Also known as: YORK YST, YST chiller, steam turbine drive chiller, SC-EQ, SE-SCC1001-1 - Water-cooled centrifugal chiller (via SC-EQ card)
York YT Centrifugal Chiller (SC-EQ)
YORK YT water-cooled centrifugal chillers with OptiView controls, fitted with the SC-EQ communication card (VSD, solid-state or electro-mechanical starters).
Also known as: YORK YT, YT chiller, OptiView YT, SC-EQ, SE-SCC1001-1 - Air-cooled variable-speed screw chiller (via SC-EQ card)
York YVAA Style B Chiller (SC-EQ)
YORK YVAA Style B air-cooled variable-speed screw chillers (two refrigerant systems) fitted with the SC-EQ communication card.
Also known as: YORK YVAA, YVAA Style B, YVAA-B, SC-EQ, SE-SCC1001-1 - Water-cooled screw chiller / water-to-water heat pump (via SC-EQ card)
York YVWH / YVWE / YGWH Water-Cooled Screw (SC-EQ)
YORK YVWH and YGWH water-to-water screw heat pumps and YVWE water-cooled screw chillers fitted with the SC-EQ communication card.
Also known as: YORK YVWH, YVWH-200, YORK YVWE, YORK YGWH, SC-EQ, water-to-water screw heat pump
Source: YVAA, YVFA, YAGK York Talk 2 (E-Link) points list, boards 031-02478 / 031-03478 · rev. 2021-04-16 (program Y.ACS.20.18). Object names, instances and units are reproduced as published; descriptions are our own.