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Water-cooled screw chiller controller · BACnet points list
Trane Symbio 800 RTHD (UC800) BACnet points list
Updated 28 October 2026
A Symbio 800 list of about 245 objects for RTHD chillers marked UC800, with small instance numbers. About 170 are diagnostic binary inputs (BI 500 and up); the rest cover water temperatures and flows, refrigerant pressures, starter and drive data and heat recovery. The BAS writes setpoints (AV), base loading, heat recovery and reset (BV) and auto/stop and mode (MV).
This page lists 244 BACnet objects for the Trane Symbio 800 RTHD (UC800) — 10 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Trane’s own free documentation, linked below.
- Manufacturer
- Trane
- Model
- Symbio 800 RTHD (UC800)
- Equipment
- Water-cooled screw chiller controller
- Equipment type
- Chillers
- BACnet objects
- 244 (10 writable)
- Transport
- BACnet IP, BACnet MS/TP
- Firmware
- Not stated
- Also known as
- RTHD, Series R RTHD, RTHD UC800, UC800, BAS-PTS034
BMS integration notes: Trane Symbio 800 RTHD (UC800)
Put the chiller on the network (BACnet MS/TP or IP), then write the auto/stop command, chilled water setpoint, current limit and mode. Read back running state, leaving water temperature and capacity. Check the local-setpoint flag to confirm the BAS setpoints are actually in use. The alarm-present flag gives a single summary 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 |
|---|---|---|---|
| MV 1 | BAS Chiller Auto Stop Command | BMS auto/stop command (1 = Stop, 2 = Auto) | Write |
| MV 2 | BAS Chiller Mode Command | Cool/heat/ice mode command | Write |
| AV 1 | BAS Chilled Water Setpoint | Chilled water setpoint from the BMS | Write |
| AV 2 | BAS Current Limit Setpoint | Current limit from the BMS, % RLA | Write |
| BI 4 | Chiller Running | Chiller on/off status | Read |
| BI 2 | Local Setpoint Control | Shows if local setpoints override BAS setpoints | Read |
| AI 13 | Evaporator Leaving Water Temperature | Leaving chilled water temperature | Read |
| AI 4 | Actual Running Capacity | Actual running capacity in percent | Read |
| BI 12 | Alarm Present | Any active alarm on the chiller | Read |
Enable & remote start
MV 1 BAS Chiller Auto Stop Command (1 = Stop, 2 = Auto; relinquish default Auto) is the BMS auto/stop. BI 1 Run Enable shows stop/auto. The document doesn't say how to hand setpoint control to the BAS; BI 2 Local Setpoint Control shows when the chiller is using local setpoints instead of BAS setpoints.
Heartbeat & communication loss
No timeout or heartbeat is described. MI 3 BAS Communication Status (established/lost/never established/starting) and the diagnostic flags BI 510 BAS Communication Loss, BI 511 and BI 512 report the BAS link; the document doesn't say what the chiller does on loss.
Network setup
- With no protocol specified at order, the controller ships as BACnet MS/TP at 76,800 bps with the rotary address at 000, and MS/TP is disabled at 000. Set a rotary address of 001-127 to bring it online.
- The rotary address sets the MS/TP MAC and the Device ID and takes effect without a power cycle. A software Device ID (1-4194302) can be set in the web UI, Tracer SC+ or Tracer TU.
- The web UI is reached only over USB at http://198.80.18.1/; the Ethernet ports do not serve it.
- BACnet IP uses Ethernet port 1 (or the optional USB Wi-Fi adapter); the default UDP port is 47808. Enable BBMD only if this is the only BACnet IP device on the subnet, then fill in the BDT.
- MS/TP wiring lands on the P1 link; P2 and P3 are for factory devices only, and Ethernet port 2 is only for the touch-screen display.
Watch out for
- Communicated units (I-P or SI) are fixed at the factory; changing them in the field needs a Trane representative. Web UI display units do not change the BACnet values.
- Points that don't apply to the unit's configuration are absent, and a technician can 'recycle' (remove) factory points from the interface, so a missing object may have been recycled.
- This list has no read/write column; writability of the command and setpoint objects is inferred from their object type and relinquish defaults.
- Relinquish defaults: AV 1 44 °F (6.7 °C), AV 2 100 % RLA, AV 3 120 °F (48.9 °C), AV 4 50 %, MV 1 Auto, MV 2 Cool. Releasing MV 1 leaves the chiller in Auto.
- MI 2 is named Chiller Mode Command but is a read-only input; write MV 2 BAS Chiller Mode Command.
- Diagnostic BIs are one object per alarm condition and only exist for the options fitted.
Trane Symbio 800 RTHD (UC800) 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.
Note: the source document has no read/write column, so access here is inferred from the object type (inputs read-only, values writable). Confirm on the live controller before writing.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AI | 1 | Active Cool/Heat Setpoint Temperature | Read | |||
| AI | 2 | Active Current Limit Setpoint | Read | |||
| AI | 3 | Active Base Loading Setpoint | Read | |||
| AImin | 4 | Actual Running Capacity | Read | |||
| AI | 5 | Evaporator Refrigerant Pressure | Read | |||
| AI | 6 | Evaporator Saturated Rfgt Temp | Read | |||
| AI | 7 | Condenser Refrigerant Pressure | Read | |||
| AI | 8 | Condenser Saturated Rfgt Temp | Read | |||
| AI | 9 | Local Atmospheric Pressure | Read | |||
| AI | 10 | Compressor Starts | Read | |||
| AI | 11 | Compressor Running Time | Read | |||
| AI | 12 | Evaporator Entering Water Temperature | Read | |||
| AImin | 13 | Evaporator Leaving Water Temperature | Read | |||
| AI | 14 | Condenser Entering Water Temperature | Read | |||
| AI | 15 | Condenser Leaving Water Temperature | Read | |||
| AI | 16 | Compressor Oil Pressure | Read | |||
| AI | 17 | Discharge Temperature | Read | |||
| AI | 18 | Head Pressure Control Command | Read | |||
| AI | 19 | Starter Input Voltage AB | Read | |||
| AI | 20 | Starter Input Voltage BC | Read | |||
| AI | 21 | Starter Input Voltage CA | Read | |||
| AI | 22 | Starter Motor Current L1 | Read | |||
| AI | 23 | Starter Motor Current L2 | Read | |||
| AI | 24 | Starter Motor Current L3 | Read | |||
| AI | 25 | Starter Motor Current L1 % RLA | Read | |||
| AI | 26 | Starter Motor Current L2 % RLA | Read | |||
| AI | 27 | Starter Motor Current L3 % RLA | Read | |||
| AI | 28 | Number of Circuits | Read | |||
| AI | 29 | Number of Compressors— Ckt1 | Read | |||
| AI | 30 | Number of Compressors—Ckt2 | Read | |||
| AI | 31 | Chiller Design Capacity | Read | |||
| AI | 32 | Frequency Command | Read | |||
| AI | 33 | AFD Output Power | Read | |||
| AI | 34 | Approx Evap Water Flow | Read | |||
| AI | 35 | Evap Differential Wtr Press | Read | |||
| AI | 36 | Approx Cond Water Flow | Read | |||
| AI | 37 | Cond Differential Wtr Press | Read | |||
| AI | 38 | EXV Position Percent | Read | |||
| AI | 39 | Heat Recovery Entering Water Temperature | Read | |||
| AI | 40 | Heat Recovery Leaving Water Temperature | Read | |||
| AI | 41 | Heat Recovery Tank Water Temp | Read | |||
| AI | 42 | Evaporator Approach Temperature | Read | |||
| AI | 43 | Condenser Approach Temperature | Read | |||
| AI | 44 | Motor Winding Temperature 1 | Read | |||
| AI | 45 | Motor Winding Temperature 2 | Read | |||
| AVmin | 1 | BAS Chilled Water Setpoint | Write | |||
| AVmin | 2 | BAS Current Limit Setpoint | Write | |||
| AV | 3 | BAS Hot Water Setpoint | Write | |||
| AV | 4 | BAS Base Loading Setpoint | Write | |||
| AV | 5 | BAS Heat Recovery Water Tank Temperature Setpoint | Write | |||
| BI | 1 | Run Enable | Read | 0 = stop, 1 = auto | ||
| BImin | 2 | Local Setpoint Control | Read | 0 = no, 1 = yes | ||
| BI | 3 | Limit Mode Relay Status | Read | 0 = inactive, 1 = active | ||
| BImin | 4 | Chiller Running | Read | 0 = off, 1 = on | ||
| BI | 5 | Condenser Water Flow Status | Read | 0 = no flow, 1 = flow | ||
| BI | 6 | Head Relief Request Relay | Read | 0 = off, 1 = on | ||
| BI | 7 | Active Base Loading Command | Read | 0 = auto, 1 = on | ||
| BI | 8 | Compressor Running Status | Read | 0 = off, 1 = running | ||
| BI | 9 | Evaporator Water Pump Command | Read | 0 = off, 1 = on | ||
| BI | 10 | Condenser Water Pump Command | Read | 0 = off, 1 = on | ||
| BI | 11 | Evaporator Water Flow Status | Read | 0 = no flow, 1 = flow | ||
| BImin | 12 | Alarm Present | Read | 0 = no, 1 = yes | ||
| BI | 13 | Shutdown Alarm Present | Read | 0 = no, 1 = yes | ||
| BI | 15 | Heat Recovery Water Flow Status | Read | 0 = no flow, 1 = flow | ||
| BI | 16 | Heat Recovery Control Active Status | Read | 0 = inactive, 1 = active | ||
| BI | 501 | Comm Loss: Ext Base Loading Command Chiller | Read | |||
| BI | 502 | Comm Loss: Ext Base Loading Setpoint Chiller | Read | |||
| BI | 503 | External Base Loading Setpoint Chiller | Read | |||
| BI | 504 | Comm Loss: Evap Entering Water Temp Chiller | Read | |||
| BI | 505 | Comm Loss: Evap Leaving Water Temp Chiller | Read | |||
| BI | 506 | Comm Loss: Outdoor Air Temperature Chiller | Read | |||
| BI | 508 | Outdoor Air Temperature Sensor Chiller | Read | |||
| BI | 510 | BAS Communication Loss | Read | |||
| BI | 511 | BAS Failed to Establish Communication | Read | |||
| BI | 512 | Comm Loss: Local BAS Interface | Read | |||
| BI | 516 | LCI-C Software Mismatch: Use BAS Tool | Read | |||
| BI | 517 | Comm Loss: Oil Loss Level Sensor Input Chiller | Read | |||
| BI | 518 | Comm Loss: Cprsr Discharge Rfgt Temp Chiller | Read | |||
| BI | 519 | Comm Loss: High Pressure Cutout Switch Chiller | Read | |||
| BI | 520 | Comm Loss: Primary Oil Line SV | Read | |||
| BI | 521 | Comm Loss: Oil Pressure Chiller | Read | |||
| BI | 522 | Comm Loss: Oil Return Gas Pump Drain Chiller | Read | |||
| BI | 523 | Comm Loss: Oil Return Gas Pump Fill Chiller | Read | |||
| BI | 524 | Compressor Discharge Temperature Sensor Chiller | Read | |||
| BI | 525 | High Cprsr Rfgt Discharge Temperature Chiller | Read | |||
| BI | 526 | High Differential Refrigerant Pressure Chiller | Read | |||
| BI | 527 | High Pressure Cutout Chiller | Read | |||
| BI | 528 | High Refrigerant Pressure Ratio Chiller | Read | |||
| BI | 529 | Loss of Oil at Compressor (Running) Chiller | Read | |||
| BI | 530 | Loss of Oil at Compressor (Stopped) Chiller | Read | |||
| BI | 531 | Low Differential Refrigerant Pressure Chiller | Read | |||
| BI | 532 | Low Discharge Superheat Chiller | Read | |||
| BI | 533 | Low Oil Flow Chiller | Read | |||
| BI | 534 | No Differential Refrigerant Pressure Chiller | Read | |||
| BI | 535 | Oil Flow Protection Fault Chiller | Read | |||
| BI | 536 | Oil Pressure Transducer Chiller | Read | |||
| BI | 537 | Comm Loss: Slide Valve Load Chiller | Read | |||
| BI | 538 | Comm Loss: Slide Valve Unload Chiller | Read | |||
| BI | 539 | Restart Inhibit Chiller | Read | |||
| BI | 540 | Comm Loss: Condenser Rfgt Pressure Chiller | Read | |||
| BI | 541 | Evaporator Rfgt Pressure Transducer Chiller | Read | |||
| BI | 542 | Comm Loss: Condenser Water Flow Switch | Read | |||
| BI | 543 | Comm Loss: Condenser Water Pump Relay Chiller | Read | |||
| BI | 544 | Condenser Water Flow Lost Chiller | Read | |||
| BI | 545 | Condenser Water Flow Overdue Chiller | Read | |||
| BI | 546 | Comm Loss: Condenser Entering Water Temp Chiller | Read | |||
| BI | 547 | Comm Loss: Condenser Leaving Water Temp Chiller | Read | |||
| BI | 548 | Condenser Entering Water Temp Sensor Chiller | Read | |||
| BI | 549 | Condenser Leaving Water Temp Sensor Chiller | Read | |||
| BI | 550 | Comm Loss: Evaporator Rfgt Liquid Level Chiller | Read | |||
| BI | 551 | Evaporator Liquid Level Sensor Chiller | Read | |||
| BI | 552 | High Evaporator Liquid Level Chiller | Read | |||
| BI | 553 | Low Evaporator Liquid Level Chiller | Read | |||
| BI | 554 | Low Evaporator Refrigerant Pressure Chiller | Read | |||
| BI | 555 | Low Evaporator Refrigerant Temperature Chiller | Read | |||
| BI | 556 | Low Evaporator Temp: Unit Off Chiller | Read | |||
| BI | 557 | Comm Loss: Evaporator Water Flow Switch Chiller | Read | |||
| BI | 558 | Comm Loss: Evaporator Water Pump Relay Chiller | Read | |||
| BI | 559 | Evaporator Water Flow Lost Chiller | Read | |||
| BI | 560 | Evaporator Water Flow Overdue Chiller | Read | |||
| BI | 561 | High Evaporator Refrigerant Pressure Chiller | Read | |||
| BI | 562 | High Evaporator Water Temperature Chiller | Read | |||
| BI | 563 | Evap Water Flow (Entering Water Temp) Chiller | Read | |||
| BI | 564 | Evaporator Entering Water Temp Sensor Chiller | Read | |||
| BI | 565 | Evaporator Leaving Water Temp Sensor Chiller | Read | |||
| BI | 566 | Low Evaporator Water Temp (Unit On) Chiller | Read | |||
| BI | 567 | Low Evaporator Water Temp (Unit Off) Chiller | Read | |||
| BI | 568 | Comm Loss: Electronic Expansion Valve 1 Chiller | Read | |||
| BI | 569 | Comm Loss: Electronic Expansion Valve 2 Chiller | Read | |||
| BI | 570 | Comm Loss: Evaporator Rfgt Pressure Chiller | Read | |||
| BI | 571 | Evaporator Rfgt Pressure Transducer Chiller | Read | |||
| BI | 572 | Comm Loss: Compressor % RLA Output Chiller | Read | |||
| BI | 573 | Comm Loss: Cond Rfgt Pressure Output | Read | |||
| BI | 574 | Comm Loss: Cond Head Press Cntrl Output Chiller | Read | |||
| BI | 575 | Comm Loss: Emergency Stop Chiller | Read | |||
| BI | 576 | Comm Loss: Ext Chilled/Hot Water Setpoint Chiller | Read | |||
| BI | 577 | Comm Loss: Ext Current Limit Setpoint Chiller | Read | |||
| BI | 578 | Comm Loss: External Auto/Stop Chiller | Read | |||
| BI | 579 | Comm Loss: External Hot Water Command Chiller | Read | |||
| BI | 580 | Comm Loss: Op Status Programmable Relays Chiller | Read | |||
| BI | 581 | Comm Loss: Refrigerant Monitor Input Chiller | Read | |||
| BI | 582 | Emergency Stop Chiller | Read | |||
| BI | 583 | External Chilled/Hot Water Setpoint Chiller | Read | |||
| BI | 584 | External Current Limit Setpoint Chiller | Read | |||
| BI | 585 | Refrigerant Monitor Input Chiller | Read | |||
| BI | 586 | Comm Loss: External Ice Building Command Ice Building | Read | |||
| BI | 587 | Comm Loss: Ice Building Status Relay Ice Building | Read | |||
| BI | 588 | Comm Loss: SSS/AFD Fault Chiller | Read | |||
| BI | 589 | Comm Loss: Starter Chiller | Read | |||
| BI | 590 | Solid State Starter Fault Chiller | Read | |||
| BI | 591 | Starter Failed to Arm/Start Chiller | Read | |||
| BI | 592 | Unexpected Starter Shutdown Chiller | Read | |||
| BI | 593 | At Speed Input Opened Chiller | Read | |||
| BI | 594 | At Speed Input Shorted Chiller | Read | |||
| BI | 595 | Compressor Did Not Accel: Transition Chiller | Read | |||
| BI | 596 | Compressor Did Not Accelerate Fully Chiller | Read | |||
| BI | 597 | Compressor Did Not Accelerate: Shutdown Chiller | Read | |||
| BI | 598 | Starter Contactor Interrupt Failure Chiller | Read | |||
| BI | 599 | Momentary Power Loss Chiller | Read | |||
| BI | 600 | Motor Current Overload Chiller | Read | |||
| BI | 601 | Over Voltage Chiller | Read | |||
| BI | 602 | Phase Loss Chiller | Read | |||
| BI | 603 | Phase Reversal Chiller | Read | |||
| BI | 604 | Power Loss Chiller | Read | |||
| BI | 605 | Severe Current Unbalance Chiller | Read | |||
| BI | 606 | Starter Comm Loss: Main Processor Chiller | Read | |||
| BI | 607 | Starter Did Not Transition | Read | |||
| BI | 608 | Starter Dry Run Test Chiller | Read | |||
| BI | 609 | Starter Fault Type I Chiller | Read | |||
| BI | 610 | Starter Fault Type II Chiller | Read | |||
| BI | 611 | Starter Fault Type III Chiller | Read | |||
| BI | 612 | Starter Module Memory Error Type 1 Chiller | Read | |||
| BI | 613 | Starter Module Memory Error Type 2 Chiller | Read | |||
| BI | 614 | Transition Complete Input Opened | Read | |||
| BI | 615 | Transition Complete Input Shorted | Read | |||
| BI | 616 | Under Voltage Chiller | Read | |||
| BI | 617 | Check Clock | Read | |||
| BI | 619 | MP: Invalid Configuration Platform | Read | |||
| BI | 622 | MP: Reset Has Occurred Platform | Read | |||
| BI | 623 | AFD Drive Fault Chiller | Read | |||
| BI | 624 | AFD Output Power Input Chiller | Read | |||
| BI | 625 | Comm Loss: AFD Speed Signal Output Chiller | Read | |||
| BI | 626 | Comm Loss: AFD Output Power Input Chiller | Read | |||
| BI | 627 | Software Error 1001: Call Trane Service Chiller | Read | |||
| BI | 628 | Low Evaporator Water Flow | Read | |||
| BI | 629 | Comm Loss: Evap Diff Water Pressure | Read | |||
| BI | 630 | Comm Loss: Cond Diff Water Pressure | Read | |||
| BI | 631 | Evaporator Diff Water Pressure Xdcr | Read | |||
| BI | 632 | Condenser Diff Water Pressure Xdcr(a) | Read | |||
| BI | 633 | Comm Loss: Adaptive Frequency Drive | Read | |||
| BI | 634 | Comm Loss: External Heat Recovery Setpoint | Read | |||
| BI | 635 | Comm Loss: External Heat Recovery Command | Read | |||
| BI | 636 | Comm Loss: HR Entering Water Temp Sensor | Read | |||
| BI | 637 | Comm Loss: HR Leaving Water Temp Sensor | Read | |||
| BI | 638 | Comm Loss: Heat Recovery Tank Water Temp | Read | |||
| BI | 639 | Comm Loss: Heat Recovery Water Flow Switch | Read | |||
| BI | 640 | Comm Loss: Heat Recovery Water Pump Relay | Read | |||
| BI | 641 | Ext Heat Recovery Temp Setpoint Sensor | Read | |||
| BI | 642 | Heat Recovery Entering Water Temperature Sensor | Read | |||
| BI | 643 | Heat Recovery Leaving Water Temperature Sensor | Read | |||
| BI | 644 | Heat Recovery Tank Water Temp Sensor | Read | |||
| BI | 645 | Heat Recovery Water Flow Lost | Read | |||
| BI | 646 | Heat Recovery Water Flow Overdue | Read | |||
| BI | 647 | Unexpected Heat Recovery Water Flow | Read | |||
| BI | 648 | Unexpected Condenser Water Flow | Read | |||
| BI | 649 | Comm Loss: Economizer Valve | Read | |||
| BI | 650 | Comm Loss: Economizer Temperature | Read | |||
| BI | 651 | Economizer Temperature Sensor | Read | |||
| BI | 652 | Comm Loss: Economizer Pressure | Read | |||
| BI | 653 | Economizer Pressure Sensor | Read | |||
| BI | 654 | Comm Loss: Economizer Bypass Valve | Read | |||
| BI | 655 | AFD Bus Over Voltage | Read | |||
| BI | 656 | AFD Bus Under Voltage | Read | |||
| BI | 657 | AFD Comm Loss: Main Processor | Read | |||
| BI | 658 | AFD Emergency Stop Fault | Read | |||
| BI | 659 | AFD General Failure | Read | |||
| BI | 660 | AFD Ground Fault | Read | |||
| BI | 661 | AFD Instantaneous Current Overload | Read | |||
| BI | 662 | AFD Inverter Heatsink Over Temp | Read | |||
| BI | 663 | AFD Motor Current Overload | Read | |||
| BI | 664 | AFD Output Phase Loss | Read | |||
| BI | 665 | AFD Rated Current Out of Range | Read | |||
| BI | 666 | High Pressure Cutout | Read | |||
| BI | 667 | AFD Interrupt Failure | Read | |||
| BI | 668 | High Motor Winding Temperature | Read | |||
| BI | 669 | Motor Winding Temp Sensor - Cprsr1A | Read | |||
| BI | 670 | Excessive Condenser Pressure | Read | |||
| BI | 671 | Comm Loss: Motor Winding Temperature 1 | Read | |||
| BI | 672 | Comm Loss: Motor Winding Temperature 2 | Read | |||
| BI | 673 | Comm Loss: Oil Return Purge Valve | Read | |||
| BI | 674 | Comm Loss: Hot Gas Bypass Valve | Read | |||
| BI | 675 | Comm Loss: Liquid Line Bypass Valve | Read | |||
| BV | 1 | BAS Base Loading Enable | Write | 0 = auto, 1 = on | ||
| BV | 2 | BAS Diagnostic Reset | Write | 0 = false (no reset), 1 = true (can reset) | ||
| BV | 3 | BAS Heat Recovery Command | Write | 0 = auto, 1 = on | ||
| MI | 1 | Chiller Running Status | Read | 1 = not running, 2 = starting, 3 = running, 4 = stopping, 5 = Chiller in service mode | ||
| MI | 2 | Chiller Mode Command | Read | 1 = cool, 2 = heat, 3 = ice, 4 = not used | ||
| MI | 3 | BAS Communication Status | Read | 1 = established, 2 = lost, 3 = never established, 4 = starting | ||
| MI | 4 | Refrigerant Type | Read | 5 = R-134A | ||
| MI | 7 | Manufacturing Location | Read | 3 = Pueblo, CO, USA, 4 = Charmes,France, 15 = Taicang, China | ||
| MI | 34 | Model Information | Read | 6 = RTH | ||
| MI | 35 | Cooling Type | Read | 1 = water cooled | ||
| MVmin | 1 | BAS Chiller Auto Stop Command | Write | 1 = Stop, 2 = Auto | ||
| MVmin | 2 | BAS Chiller Mode Command | Write | 1 = cool, 2 = heat, 3 = ice |
No points match these filters.
Integration notes
- Only the points that apply to the unit's factory configuration show up; the doc lists every possible point.
- The tables have no read/write column: AI/BI/MI are read-only, and the AV/BV/MV objects (listed with a relinquish default and valid range) are the BAS setpoints and commands, marked writable here.
- The analog tables give only the data type (Real) instead of engineering units, so units are blank here.
- BI 500 and up are diagnostic flags, one per alarm condition; the document lists their names only, with no state text.
- The Symbio 800 integration guide (BAS-SVP083) covers BACnet IP and BACnet MS/TP; the rotary address sets the MS/TP MAC and a default Device ID of 1-127, and a software Device ID can be set instead.
- Trane titles this list 'RTHD (UC800)' and does not explain the suffix in the document. Its objects use short instance numbers (AI 1, BI 4...) instead of the 5-digit numbering in the standard Symbio 800 RTHD list (BAS-PTS015), so check which list matches the controller on site.
- The same document also has a Modbus register map; only the BACnet side is listed here.
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 Symbio 800 RTHD (UC800) 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 Trane Symbio 800 RTHD (UC800)
How many BACnet points does the Trane Symbio 800 RTHD (UC800) have?
This list has 244 BACnet objects: 45 analog inputs, 5 analog values, 182 binary inputs, 3 binary values, 7 multi-state inputs, 2 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Trane Symbio 800 RTHD (UC800) BACnet points are writable?
10 of the 244 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. The source has no read/write column, so this is inferred from object type.
Where is the official Trane Symbio 800 RTHD (UC800) BACnet documentation?
The source is Symbio 800 Integration Points List BACnet - RTHD (UC800) (BAS-PTS034A-EN), revision 12/6/2024, published free by Trane at https://elibrary.tranetechnologies.com/public/commercial-hvac/Literature/Points%20List/BAS-PTS034A-EN_12062024.pdf.
What are the minimum BACnet points to integrate the Trane Symbio 800 RTHD (UC800)?
Start with MV 1 BAS Chiller Auto Stop Command (BMS auto/stop command (1 = Stop, 2 = Auto)); MV 2 BAS Chiller Mode Command (Cool/heat/ice mode command); AV 1 BAS Chilled Water Setpoint (Chilled water setpoint from the BMS); AV 2 BAS Current Limit Setpoint (Current limit from the BMS, % RLA); BI 4 Chiller Running (Chiller on/off status); BI 2 Local Setpoint Control (Shows if local setpoints override BAS setpoints); AI 13 Evaporator Leaving Water Temperature (Leaving chilled water temperature); AI 4 Actual Running Capacity (Actual running capacity in percent); BI 12 Alarm Present (Any active alarm on the chiller).
How do I enable BMS control of the Trane Symbio 800 RTHD (UC800)?
MV 1 BAS Chiller Auto Stop Command (1 = Stop, 2 = Auto; relinquish default Auto) is the BMS auto/stop. BI 1 Run Enable shows stop/auto. The document doesn't say how to hand setpoint control to the BAS; BI 2 Local Setpoint Control shows when the chiller is using local setpoints instead of BAS setpoints.
Does the Trane Symbio 800 RTHD (UC800) need a BACnet heartbeat or have a communication timeout?
No timeout or heartbeat is described. MI 3 BAS Communication Status (established/lost/never established/starting) and the diagnostic flags BI 510 BAS Communication Loss, BI 511 and BI 512 report the BAS link; the document doesn't say what the chiller does on loss.
How do I check these points on the real Symbio 800 RTHD (UC800)?
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 Trane BACnet points lists
- Rooftop unit communication interface (ReliaTel)
Trane BCI2-R (ReliaTel)
Trane packaged rooftop units with ReliaTel controls (Voyager, Precedent, Odyssey) fitted with the BCI2-R BACnet card.
Also known as: BCI2-R, BCI2R, ReliaTel BACnet interface, BACnet Communication Interface for ReliaTel, BAS-SVP053, Voyager, Precedent, Odyssey - Water-source heat pump controller
Trane Symbio 400-B/500 Water-Source Heat Pump
Trane water-source heat pumps controlled by a Symbio 400-B or Symbio 500 programmable controller.
Also known as: Symbio 400-B, Symbio 400B, Symbio 500, Symbio WSHP, BAS-SVP061B-EN - Self-contained unit controller
Trane Symbio 500 Commercial Self-Contained (SWUD)
Trane commercial self-contained (SWUD) units controlled by a Symbio 500.
Also known as: Symbio 500, SWUD, Commercial Self-Contained, CSC, BAS-PTS038 - Self-contained unit controller
Trane Symbio 500 Modular Self-Contained (SCWM)
Trane modular self-contained (SCWM) units controlled by a Symbio 500.
Also known as: Symbio 500, SCWM, Modular Self-Contained, BAS-PTS037 - Split system controller
Trane Symbio 700 Odyssey
Trane Odyssey split systems controlled by a Symbio 700.
Also known as: Symbio 700, Odyssey split system, BAS-PTS005 - Rooftop unit controller
Trane Symbio 700 Precedent / Axiom
Trane Precedent packaged rooftop units and Axiom rooftop water-source heat pumps with the Symbio 700 controller.
Also known as: Symbio 700, Symbio700, Precedent rooftop, Axiom rooftop WSHP, BAS-PTS001 - Air-cooled chiller controller
Trane Symbio 800 ACRB Small (UC800)
Trane ACRB Small air-cooled chillers whose Symbio 800 points list Trane tags '(UC800)'.
Also known as: ACRB, ACRB Small, ACRB UC800, Symbio 800 ACRB, BAS-PTS025 - Air-cooled chiller controller
Trane Symbio 800 ACSA (UC800)
Trane ACSA air-cooled chillers whose Symbio 800 points list Trane tags '(UC800)'.
Also known as: ACSA, ACSA UC800, Symbio 800 ACSA, BAS-PTS026 - Water-cooled centrifugal chiller controller
Trane Symbio 800 Agility (HDWA / HDDA)
Trane Agility water-cooled centrifugal chillers (model HDWA and HDDA per the model information point) with Symbio 800 controls.
Also known as: Agility, HDWA, HDDA, Agility water-cooled chiller, Symbio 800 Agility, BAS-PTS007 - Air-cooled chiller controller
Trane Symbio 800 Ascend ACR Series C
Trane Ascend model ACR Series C air-cooled chillers with Symbio 800 controls.
Also known as: Ascend ACR, ACR Series C, Ascend air-cooled chiller, Symbio 800 Ascend ACR, BAS-PTS021 - Air-cooled chiller controller
Trane Symbio 800 Ascend ACS / ACX
Trane Ascend model ACS and ACX air-cooled scroll chillers with Symbio 800 controls.
Also known as: Ascend ACS, Ascend ACX, Ascend air-cooled chiller, Symbio 800 Ascend, BAS-PTS011 - Centrifugal chiller controller
Trane Symbio 800 CenTraVac (Duplex)
Two-compressor (duplex) Trane CenTraVac water-cooled centrifugal chillers with Symbio 800 controls.
Also known as: CenTraVac Duplex, CDHH, CDHF, Symbio 800 CenTraVac, BAS-PTS009 - Centrifugal chiller controller
Trane Symbio 800 CenTraVac (Simplex)
Single-compressor (simplex) Trane CenTraVac water-cooled centrifugal chillers with Symbio 800 controls.
Also known as: CenTraVac, CVHE, CVHF, CVHH, Symbio 800 CenTraVac, BAS-PTS009 - Centrifugal chiller controller
Trane Symbio 800 CenTraVac Simplex (UC800)
Trane CenTraVac (CTV) simplex centrifugal chillers whose Symbio 800 points list Trane tags '(UC800)'.
Also known as: CenTraVac, CTV, CTV-Simplex, CenTraVac UC800, Symbio 800 CenTraVac, BAS-PTS029 - Air-cooled scroll chiller controller
Trane Symbio 800 CGAM
Trane CGAM air-cooled scroll chillers with Symbio 800 controls.
Also known as: CGAM, CGAM air-cooled chiller, Symbio 800 CGAM, BAS-PTS019 - Air-cooled scroll chiller controller
Trane Symbio 800 CGAM (CH530)
Trane CGAM air-cooled scroll chillers whose Symbio 800 points list Trane tags '(CH530)'.
Also known as: CGAM, CGAM CH530, CH530 CGAM, Symbio 800 CGAM, BAS-PTS027 - Water-cooled centrifugal chiller controller
Trane Symbio 800 HDWA (UC800)
Trane HDWA water-cooled chillers whose Symbio 800 points list Trane tags '(UC800)'.
Also known as: HDWA, Agility HDWA, HDWA UC800, Symbio 800 HDWA, BAS-PTS028 - Split system controller
Trane Symbio 800 IntelliCore Split System (RAUK)
Trane IntelliCore split systems (RAUK) controlled by a Symbio 800.
Also known as: IntelliCore, RAUK, IntelliCore split system, Symbio 800, BAS-PTS036 - Rooftop unit / air handler controller
Trane Symbio 800 IntelliPak
Trane IntelliPak large packaged rooftop units running the Symbio 800 controller.
Also known as: Symbio 800, IntelliPak rooftop, IntelliPak with Symbio 800, BAS-PTS003 - Air-cooled screw chiller controller
Trane Symbio 800 RTAC
Trane RTAC air-cooled helical-rotary chillers with Symbio 800 controls.
Also known as: RTAC, Series R RTAC, RTAC air-cooled chiller, BAS-PTS023 - Air-cooled screw chiller controller
Trane Symbio 800 RTAC (CH530)
Trane RTAC air-cooled helical-rotary chillers covered by Trane's 'RTAC (CH530)' Symbio 800 points list.
Also known as: RTAC, Series R RTAC, RTAC CH530, CH530, BAS-PTS031 - Air-cooled screw chiller controller
Trane Symbio 800 RTAC (UC800)
Trane RTAC air-cooled helical-rotary chillers covered by Trane's 'RTAC (UC800)' Symbio 800 points list.
Also known as: RTAC, Series R RTAC, RTAC UC800, UC800, BAS-PTS032 - Water-cooled screw chiller controller
Trane Symbio 800 RTHD (CH530)
Trane RTHD water-cooled helical-rotary chillers covered by Trane's 'RTHD (CH530)' Symbio 800 points list.
Also known as: RTHD, Series R RTHD, RTHD CH530, CH530, BAS-PTS033 - Water-cooled screw chiller controller
Trane Symbio 800 RTWD (CH530)
Trane RTWD water-cooled helical-rotary chillers covered by Trane's 'RTWD (CH530)' Symbio 800 points list.
Also known as: RTWD, Series R RTWD, RTWD CH530, CH530, BAS-PTS035 - Water-cooled screw chiller controller
Trane Symbio 800 Series R RTHD
Trane Series R model RTHD water-cooled helical-rotary chillers with Symbio 800 controls.
Also known as: RTHD, Series R RTHD, RTHD water-cooled chiller, Symbio 800 RTHD, BAS-PTS015 - Water-cooled screw chiller controller
Trane Symbio 800 Series R RTWD
Trane Series R model RTWD water-cooled helical-rotary chillers with Symbio 800 controls.
Also known as: RTWD, Series R RTWD, Series R water-cooled chiller, BAS-PTS017 - Air-cooled screw chiller controller
Trane Symbio 800 Sintesis RTAF
Trane Sintesis model RTAF air-cooled helical-rotary chillers with Symbio 800 controls.
Also known as: Sintesis RTAF, RTAF, Sintesis air-cooled chiller, Symbio 800 Sintesis, BAS-PTS013
Source: Symbio 800 Integration Points List BACnet - RTHD (UC800) · BAS-PTS034A-EN · rev. 12/6/2024. Object names, instances and units are reproduced as published; descriptions are our own.