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Fan coil unit controller (room thermostat) · BACnet points list

Johnson Controls T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP) BACnet points list

Updated 4 November 2026

Short answer

The T8800 is a compact touch screen fan coil thermostat with BACnet MS/TP. Its 18 objects cover the three fan speed relays, the valve outputs, room temperature, setpoint, power, mode, fan speed, occupancy and an error code. VLV-2 exists only on the TF20 and VLV-M only on the TB21.

This page lists 18 BACnet objects for the Johnson Controls T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP) — 13 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Johnson Controls’s own free documentation, linked below.

Manufacturer
Johnson Controls
Model
T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP)
Equipment
Fan coil unit controller (room thermostat)
Equipment type
VAV boxes & fan coils
BACnet objects
18 (13 writable)
Transport
BACnet MS/TP
Firmware
Not stated
Also known as
T8800, T8800-TF20, T8800-TB20, T8800-TB21
Source document
T8800 series BACnet MS/TP Networked Thermostat Controller Technical Bulletin · Rev 1.0
Download CSV 18 rows Download EDE B.I.G.-EU JSON Manufacturer PDF ↗ Compare with your scan Download Easy BACnet Mobile App Google Play

Reference only, provided as-is: verify against Johnson Controls’s current documentation and the live device before use. Not official Johnson Controls information. Terms of use.

BMS integration notes: Johnson Controls T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP)

Integration in brief

Set the MAC address at the thermostat, discover it on the BACnet MS/TP trunk, then command POWER, ORP-MODE, FAN-S and ZN-SP. Read EFF-ZNT, OCC-S and ERROR.

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.

ObjectNameWhyAccess
BV 1101POWERFan coil on/off commandCommand
MV 1301ORP-MODEMode: Cooling, Heating or VentilationWrite
MV 1302FAN-SFan speed: Auto, Low, Med or HighWrite
AV 1202ZN-SPSetpoint, 5-35 °CWrite
MV 1303OCC-SOccupancy; BAS can override at priority 8Command
AV 1201EFF-ZNTRoom temperature, °CRead
MV 1304ERRORError status: OK, E1, E2, HI, LORead

Enable & remote start

POWER (BV 1101) turns the fan coil on or off. LC-PWR-PRI (MV 1305) decides whether the touch button writes power at priority 16 (Normal) or priority 8 (High, held for 6 hours), which matters if the BAS also commands POWER.

Sensors & values from the BMS

RZN-T (AI 1008) reads a wired remote sensor; the guide lists no BAS-written temperature object.

Network setup

Watch out for

Johnson Controls T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP) 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.

18 of 18 shown
Type
Multi-state
Access
Show
Johnson Controls T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP) BACnet Points List
DescriptionStates
BO1001FAN-HHigh fan speed outputCommandOff/On
BO1002FAN-MMedium fan speed outputCommandOff/On
BO1003FAN-LLow fan speed outputCommandOff/On
BO1004VLV-1Valve output; cooling valve on TF20, cool/heat valve on TB20CommandOff/On
BO1005VLV-2Heating valve output; T8800-TF20 onlyCommandOff/On
AO1006VLV-MModulating valve output, 0-100 %; T8800-TB21 only%Command
AI1007ZN-TRoom temperature, internal sensor; 0 to 55 °C°CRead
AI1008RZN-TRoom temperature, remote sensor; 0 to 55 °C°CRead
BI1009HW-OCCOccupancy contact; shares the input with RZN-TReadUnoccupied/Occupied
BVmin1101POWERFan coil power on/offCommandOff/On
BV1102CLG-ONLYCooling and ventilation only; TB20 and TB21WriteDisable/Enable
AVmin1201EFF-ZNTCurrent room temperature; 0 to 55 °C°CRead
AVmin1202ZN-SPSetpoint; 5 to 35 °C°CWrite
MVmin1301ORP-MODERunning mode; local or remoteWriteCooling, Heating, Ventilation
MVmin1302FAN-SFan speedWriteAuto, Low, Med, High
MVmin1303OCC-SOccupancy status; BAS can override at priority 8CommandUnoccupied/Occupied
MVmin1304ERRORError statusReadOK, E1, E2, HI, LO
MV1305LC-PWR-PRIPriority used for local power commandsWriteNormal, High
Object ID lookup: Johnson Controls T8800 Fan Coil Thermostat point IDs by name

Integration notes

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. This list is provided as-is for reference only and may contain mistakes — confirming it before you write, map or commission anything is up to you (terms). Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP) 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 Johnson Controls T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP)

How many BACnet points does the Johnson Controls T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP) have?

This list has 18 BACnet objects: 2 analog inputs, 1 analog output, 2 analog values, 1 binary input, 5 binary outputs, 2 binary values, 5 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Johnson Controls T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP) BACnet points are writable?

13 of the 18 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 Johnson Controls T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP) BACnet documentation?

The source is T8800 series BACnet MS/TP Networked Thermostat Controller Technical Bulletin (Rev 1.0), published free by Johnson Controls at https://docs.johnsoncontrols.com/bas/api/khub/documents/PIGe3jav7ZDIZJecfZS20g/content.

What are the minimum BACnet points to integrate the Johnson Controls T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP)?

Start with BV 1101 POWER (Fan coil on/off command); MV 1301 ORP-MODE (Mode: Cooling, Heating or Ventilation); MV 1302 FAN-S (Fan speed: Auto, Low, Med or High); AV 1202 ZN-SP (Setpoint, 5-35 °C); MV 1303 OCC-S (Occupancy; BAS can override at priority 8); AV 1201 EFF-ZNT (Room temperature, °C); MV 1304 ERROR (Error status: OK, E1, E2, HI, LO).

How do I enable BMS control of the Johnson Controls T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP)?

POWER (BV 1101) turns the fan coil on or off. LC-PWR-PRI (MV 1305) decides whether the touch button writes power at priority 16 (Normal) or priority 8 (High, held for 6 hours), which matters if the BAS also commands POWER.

Can the BMS supply sensor values to the Johnson Controls T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP)?

RZN-T (AI 1008) reads a wired remote sensor; the guide lists no BAS-written temperature object.

How do I check these points on the real T8800 Series Touch Screen Fan Coil Thermostat (BACnet MS/TP)?

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 Johnson Controls BACnet points lists

Source: T8800 series BACnet MS/TP Networked Thermostat Controller Technical Bulletin · Rev 1.0. Object names, instances and units are reproduced as published; descriptions are our own.