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Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4

Commercial Wi-Fi thermostat · BACnet points list

Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 BACnet points list

Updated 7 November 2026

Short answer

The Connect 33TCSPF-4 / 33TWSPF-4 thermostat exposes 149 BACnet objects (plus two network port objects) over BACnet MS/TP or BACnet IP over Wi-Fi (it has an MS/TP network port object and an IPv4 network port object). Compared with the earlier 33CONNECTSTAT43 list it adds outdoor air quality values, standby setpoints, hydronic fan coil and analog output (hot water valve) points, door switch points and network general purpose outputs. Configuration objects are gated: they only accept writes after BACnet Config Write Enable is turned on.

This page lists 149 BACnet objects for the Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 — 97 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Carrier’s own free documentation, linked below.

Manufacturer: Carrier
Model: Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4
Equipment: Commercial Wi-Fi thermostat
Equipment type: Thermostats, sensors & meters
BACnet objects: 149 (97 writable)
Transport: BACnet MS/TP, BACnet IP
Firmware: Not stated
Also known as: 33TCSPF-4, 33TWSPF-4, 33TCSPF4, 33TWSPF4
Source document: Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 Installation Guide (Appendix A, BACnet Objects) · 11-808-1226-01 · rev. 2026-06

Download CSV 149 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 Carrier’s current documentation and the live device before use. Not official Carrier information. Terms of use.

BMS integration notes: Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4

Integration in brief

Connect the thermostat on MS/TP or IP, then drive it with the user mode (MV 400), heat/cool setpoints and the BMS occupancy point (BV 405, enabled by BV 507). Read current mode, space temperature for control and the stage output BVs. Turn on BV 511 only when you need to change gated configuration objects.

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 400	USER_MODE	System mode: Off, Heat, Cool, Auto, E-Heat	Write
BV 405	BMS_OCC	BMS occupancy command (needs BV 507 enabled)	Write
AV 400	OCC_HT_SP	Occupied heating setpoint	Write
AV 401	OCC_CL_SP	Occupied cooling setpoint	Write
AV 103	NET_SP_TEMP	Network space temperature (with BV 407 enabled)	Write
MV 300	CURRENT_MODE	Current mode status: Off, Heat, Cool	Read
AV 104	SP_TEMP_CTRL	Space temperature used for control	Read
BV 205	G_OUT	Fan output status	Read
BV 200	Y1_OUT	First stage cooling output status	Read
BV 203	W1_OUT	First stage heating output status	Read

Enable & remote start

BMS occupancy is used only when BMS Occupancy Enable (BV 507) is enabled; the BMS then writes BACnet BMS Occupancy (BV 405). Gated configuration objects need BACnet Config Write Enable (BV 511).

Heartbeat & communication loss

Network Space Temperature (AV 103) and Network Space Humidity (AV 105) must be rewritten at least every 5 minutes; if not, the control value falls back to the thermostat's own sensor (AI 100 / AI 101).

Sensors & values from the BMS

Network Space Temperature (AV 103) and Network Space Humidity (AV 105) are written by the BMS and take effect only when BV 407 / BV 408 are enabled and the value was written within the last 5 minutes. AV 104 and AV 106 show the values the control logic actually uses.

Network setup

Network port objects: MSTP_PORT (500) for MS/TP and IP_PORT (501) for BACnet IP, including BBMD foreign device settings.
Up to 7 concurrent COV subscriptions, for BV and MV objects only, lifetime 1 s to 8 h.

Watch out for

The BACnet Reliability property is used to flag objects that the current configuration does not use (e.g. no-sensor, no-output).
Leave CFG_WR_EN (BV 511) disabled in normal operation so gated settings cannot be changed by accident.

Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 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.

149 of 149 shown

Type

BinaryMulti-state

Access

Show

Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 BACnet Points List
			Description		States
AI	100	ID_SPACE_TEMP	Indoor Space Temperature	Read
AI	101	ID_SPACE_HUM	Indoor Space Humidity	Read
AI	102	ID_SPACE_CO2	Indoor Space CO2	Read
AV	100	REM_SPACE_TEMP	Remote Space Temperature	Read
AV	101	OD_TEMP	Outdoor Temperature	Read
AV	102	SAT	Supply Air Temperature	Read
AVmin	103	NET_SP_TEMP	Network Space Temperature	Write
AVmin	104	SP_TEMP_CTRL	Space Temperature for Control	Read
AV	105	NET_SP_HUM	Network Space Humidity	Write
AV	106	SP_HUM_CTRL	Space Humidity for Control	Read
AV	107	OD_HUM	Outdoor Humidity	Read
AV	108	OD_AQI	Outdoor Air Quality Index	Read
AV	109	OD_CO	Outdoor Carbon Monoxide	Read
AV	110	OD_NO2	Outdoor Nitrogen Dioxide	Read
AV	111	OD_O3	Outdoor Ozone	Read
AV	112	OD_PM2_5	Outdoor PM2.5	Read
AV	113	OD_PM10	Outdoor PM10	Read
AV	114	OD_SO2	Outdoor Sulphur Dioxide	Read
AV	200	AN_OUT	Analog Output	Read
AV	201	NET_GP_AO_OUT	Network General Purpose Output AO	Write
AV	300	AIR_FLTR_HRS_LFT	Air Filter Hours Left	Read
AV	301	OVRD_TIME	Override Time Remaining	Read
AVmin	400	OCC_HT_SP	Occupied Heat Setpoint	Write
AVmin	401	OCC_CL_SP	Occupied Cool Setpoint	Write
AV	402	UNOCC_HT_SP	Unoccupied Heat Setpoint	Write
AV	403	UNOCC_CL_SP	Unoccupied Cool Setpoint	Write
AV	406	DEHUM_SP	Dehumidification Setpoint	Write
AV	407	HUM_SP	Humidification Setpoint	Write
AV	408	SCRN_TMT	Screen Timeout	Write
AV	409	HEAT_SP	Heat Setpoint	Write
AV	410	COOL_SP	Cool Setpoint	Write
AV	411	ACTV_BCKLT	Active Backlight	Write
AV	412	DRMNT_BCKLT	Dormant Backlight	Write
AV	413	STBY_HT_SP	Standby Heat Setpoint	Write
AV	414	STBY_CL_SP	Standby Cool Setpoint	Write
AV	500	ID_STAGES	Indoor Equip Stages	Write
AV	501	OD_STAGES	Outdoor Equip Stages	Write
AV	502	MAX_HOLD_TIME	Max Temperature Hold Time	Write
AV	503	AUTO_XOVR	Auto Changeover Delay	Write
AV	504	COOL_LOCKOUT	Cool Lockout Temperature	Write
AV	505	LO_CL_LCKOUT	Low Cool Lockout (HP only)	Write
AV	506	LO_HT_LCKOUT	Low Heat Lockout (HP only)	Write
AV	507	DLY_BW_FUEL	Delay Between Fuel (HP only)	Write
AV	508	CYCLES_HR	Cycles Per Hour	Write
AV	509	MAX_HT_SP	Max Heat Setpoint	Write
AV	510	MIN_CL_SP	Min Cool Setpoint	Write
AV	511	AUX_HT_LCKOUT	Aux Heat Lockout (HP only)	Write
AV	512	HP_LCKOUT	Heat Pump Lockout	Write
AV	513	STG_DELAY	Stage Delay	Write
AV	514	FRCD_STG_UP	Forced Stage Up Delay	Write
AV	515	DIFFERENTIAL	Stage Change Temp Differential	Write
AV	516	LINE_FREQ	Line Frequency (not implemented)	Read
AV	517	ID_TEMP_OFF	Indoor Temperature Offset	Write
AV	518	ID_HUM_OFF	Indoor Humidity Offset	Write
AV	519	SAT_OFFSET	SAT Temp Offset	Write
AV	520	AIR_FLT_HRS	Air Filter Hours	Write
AV	521	MAX_SP_ERR	Max Setpoint Error	Write
AV	522	ID_TMP_FLT_INHBT	Indoor Temp Fault Inhibit	Write
AV	523	C02_FLT_THRESHLD	C02 Fault Threshold (currently not used)	Write
AV	524	AO_HT_EN_TEMP	Hot Water Valve Enable Temp	Write
AV	525	WATER_TEMP_OFF	Water Temperature Offset	Write
AV	526	DOOR_OPEN_HT_STPT	Door Open Heat Setpoint	Write
AV	527	DOOR_OPEN_CL_STPT	Door Open Cool Setpoint	Write
BVmin	200	Y1_OUT	1st Stage Cooling Out Status	Read	0=OFF, 1=ON
BV	201	Y2_OUT	2nd Stage Cooling Out Status	Read	0=OFF, 1=ON
BV	202	Y3_OUT	3rd Stage Cooling Out Status	Read	0=OFF, 1=ON
BVmin	203	W1_OUT	1st Stage Heating Out Status	Read	0=OFF, 1=ON
BV	204	W2_OUT	2nd Stage Heating Out Status	Read	0=OFF, 1=ON
BVmin	205	G_OUT	Fan Out Status	Read	0=OFF, 1=ON
BV	206	OB_OUT	Reversing Valve Out Status	Read	0=OFF, 1=ON
BV	208	OCC_OUT	Occupancy Out Status	Read	0=OFF, 1=ON
BV	209	HUM_OUT	Humidifier Out Status	Read	0=OFF, 1=ON
BV	210	DEHUM_OUT	Dehumidifier Out Status	Read	0=OFF, 1=ON
BV	211	NET_GP_Y3_OUT	Network General Purpose Out Y3	Write	0=OFF, 1=ON
BV	212	NET_GP_W2_OUT	Network General Purpose Out W2	Write	0=OFF, 1=ON
BV	213	NET_GP_OB_OUT	Network General Purpose Out OB	Write	0=OFF, 1=ON
BV	214	FAN_LOW	Hydronic Fan Coil Fan Low	Read	0=OFF, 1=ON
BV	215	FAN_MED	Hydronic Fan Coil Fan Medium	Read	0=OFF, 1=ON
BV	216	FAN_HIGH	Hydronic Fan Coil Fan High	Read	0=OFF, 1=ON
BV	300	DOOR_IS_OPEN	Door Is Open	Read	0=NO, 1=YES
BV	400	WIFI_TIME_SYNC	Wi-Fi Time Synchronization	Write	0=DISABLED, 1=ENABLED
BV	401	PROXIMITY_EN	Proximity Sensor Enable	Write	0=DISABLED, 1=ENABLED
BV	402	AUTO_DST	Auto DST Time Shift	Write	0=DISABLED, 1=ENABLED
BV	403	WIFI_ENABLE	Wi-Fi Enable	Write	0=DISABLED, 1=ENABLED
BV	404	SETPT_OVERRIDE	Setpoint Override	Write	0=DISABLED, 1=ENABLED
BVmin	405	BMS_OCC	BACnet BMS Occupancy	Write
BV	406	FLTR_TMR_RST	Filter Timer Reset	Write	0=INACTIVE, 1=ACTIVE
BV	407	NET_SP_TEMP_EN	Network Space Temperature Enable	Write	0=DISABLED, 1=ENABLED
BV	408	NET_SP_HUM_EN	Network Space Humidity Enable	Write	0=DISABLED, 1=ENABLED
BV	500	OCC_IN_POL	Occupancy Input Polarity	Write
BV	501	ALLOW_AUTO	Auto Mode Allowed	Write
BV	502	ALLOW_PROG	Prog Mode Allowed	Write
BV	503	CELSIUS_DISP	Celsius Display	Write
BV	504	FAN_WITH_W	Fan On with W	Write
BV	505	RVS_VLV_DIR	Rvs Vlv Energized Ht	Write
BV	506	HUM_INST	Humidifier Installed	Write
BV	507	BMS_OCC_EN	BMS Occupancy Enable	Write	0=DISABLED, 1=ENABLED
BV	511	CFG_WR_EN	BACnet Config Write Enable	Write	0=DISABLED, 1=ENABLED
BV	512	CL_LO_EN	Cooling Lockout Enable	Write	0=DISABLED, 1=ENABLED
BV	513	AUX_HT_LO_EN	Aux Heat Lockout Enable	Write	0=DISABLED, 1=ENABLED
BV	514	HP_LO_EN	Heat Pump Lockout Enable	Write	0=DISABLED, 1=ENABLED
BV	515	LO_CL_LO_EN	Low Cool Lockout Enable	Write	0=DISABLED, 1=ENABLED
BV	516	LO_HT_LO_EN	Low Heat Lockout Enable	Write	0=DISABLED, 1=ENABLED
BV	517	AO_HT_VLV_LO_EN	Hot Water Valve Lockout Enable	Write	0=DISABLED, 1=ENABLED
BV	518	DOOR_OPEN_SW_STATE	Door open switch state	Write	0=OPEN, 1=CLOSED
BV	900	ID_TEMP_SENS_HI	ID TEMP SENSOR HIGH	Read	0=INACTIVE, 1=ACTIVE
BV	901	ID_TEMP_SENS_LO	ID TEMP SENSOR LOW	Read	0=INACTIVE, 1=ACTIVE
BV	902	REM_TEMP_HI	REMOTE SENSOR HIGH	Read	0=INACTIVE, 1=ACTIVE
BV	903	REM_TEMP_LO	REMOTE SENSOR LOW	Read	0=INACTIVE, 1=ACTIVE
BV	904	HUM_TEMP_HI	HUM TEMP SENSOR HIGH	Read	0=INACTIVE, 1=ACTIVE
BV	905	HUM_TEMP_LO	HUM TEMP SENSOR LOW	Read	0=INACTIVE, 1=ACTIVE
BV	906	ID_TEMP_RNG_HI	ID TEMP RANGE HIGH	Read	0=INACTIVE, 1=ACTIVE
BV	907	ID_TEMP_RNG_LO	ID TEMP RANGE LOW	Read	0=INACTIVE, 1=ACTIVE
BV	908	HUM_SENS_FAIL	HUM SENSOR FAILURE	Read	0=INACTIVE, 1=ACTIVE
BV	909	HUM_TOO_HI	HUMIDITY RANGE HIGH	Read	0=INACTIVE, 1=ACTIVE
BV	910	HUM_TOO_LO	HUMIDITY RANGE LOW	Read	0=INACTIVE, 1=ACTIVE
BV	911	OD_TEMP_FAIL	OUTDOOR SENSOR FAILURE	Read	0=INACTIVE, 1=ACTIVE
BV	912	SRVR_CONN_FAIL	NOT CONNECTED TO SERVER	Read	0=INACTIVE, 1=ACTIVE
BV	913	RTR_CONN_FAIL	NOT CONNECTED TO ROUTER	Read	0=INACTIVE, 1=ACTIVE
BV	914	WIFI_CONF_FAIL	WIFI HARDWARE FAULT	Read	0=INACTIVE, 1=ACTIVE
BV	915	ECON_FAULT	ECONOMIZER FAULT	Read	0=INACTIVE, 1=ACTIVE
MVmin	300	CURRENT_MODE	Current Mode Status	Read	1=OFF, 2=HEAT, 3=COOL
MVmin	400	USER_MODE	User Mode	Write	1=OFF, 2=HEAT, 3=COOL, 4=AUTO, 5=E-HEAT
MV	401	PROX_SENS	IR Proximity Sensitivity	Write	1=HIGH, 2=MEDIUM, 3=LOW
MV	402	SOUND	Sound Effect	Write	1=OFF, 2=CLICK, 3=BEEP
MV	403	SCHED_DAY_PARTS	Number of Parts in Schedule Day	Write	1=2 PARTS, 2=4 PARTS
MV	404	OCC_FAN	Occupied Fan Mode	Write	1=AUTO, 2=ON
MV	405	UNOCC_FAN	Unoccupied Fan Mode	Write	1=AUTO, 2=ON
MV	406	FAN MODE	Current Fan Mode	Write	1=AUTO, 2=ON, 3=OVERRIDE AUTO, 4=OVERRIDE ON
MV	407	STANDBY_FAN	Standby Fan Mode	Write	1=AUTO, 2=ON
MV	500	ID_EQUIP_TYPE	Indoor Equipment Type	Read	1=NO INDOOR, 2=FURNACE, 3=AIR HANDLER
MV	501	OD_EQUIP_TYPE	Outdoor Equipment Type	Write	1=NO OUTDOOR, 2=A/C, 3=HEAT PUMP
MV	502	REMOTE_SENSOR	Remote Sensor Type	Write	1=NONE, 2=OUTDOOR, 3=SPACE, 4=AVERAGE, 5=OCCUPANCY, 6=FAULT_INPUT, 7=SAT, 8=FILTER
MV	503	DEHUM_TYPE	Dehumidification Type	Write	1=NO, 2=YES, 3=OVRCL (2F), 4=HUMIDIMIZER
MV	504	OCC_OUTPUT	Occupancy Output Terminal	Write	1=OFF, 2=Y3, 3=O/B, 4=W2
MV	505	HUM_OUTPUT	Humidification Output Terminal	Write	1=OFF, 2=Y3, 3=O/B, 4=W2
MV	506	DEHUM_OUTPUT	Dehumidification Output Terminal	Write	1=OFF, 2=Y3, 3=O/B, 4=W2
MV	507	SMART_RECVRY	Smart Recovery	Write	1=NO, 2=30 min, 3=60 min, 4=90 min
MV	508	GP_OUT_TIMEOUT	General Purpose Output Timeout	Write	1=2 min, 2=20 min, 3=1 hr, 4=UNLIMITED
MV	509	NET_GP_Y3_MODE	Network GP Y3 Mode	Write	1=DISABLED, 2=ENERGIZED_ACTIVE, 3=ENERGIZED_INACTIVE
MV	510	NET_GP_W2_MODE	Network GP W2 Mode	Write	1=DISABLED, 2=ENERGIZED_ACTIVE, 3=ENERGIZED_INACTIVE
MV	511	NET_GP_OB_MODE	Network GP OB Mode	Write	1=DISABLED, 2=ENERGIZED_ACTIVE, 3=ENERGIZED_INACTIVE
MV	512	ANALOG_INPUT	Analog Input (not used)	Write	1=None, 2=Humidity, 3=CO2
MV	513	ANALOG_IN_SCALE	Analog Input Scaling (not used)	Write	1=2-10V (4-20mAw/ext 500 Ohm), 2=0-10V
MV	514	ANALOG_OUTPUT	Analog Output Configuration	Write	1=None, 2=Water Valve, 3=Three Speed Fan
MV	515	ANALOG_OUT_SCALE	Analog Output Scaling	Write	1=2-10v, 2=0-10v
MV	516	ANALOG_OUT_TYPE	Analog Output Type	Write	1=NORMALLY CLOSED, 2=NORMALLY OPEN
MV	517	NET_GP_AO_MODE	Network GP AO Mode	Write	1=DISABLED, 2=DIRECT LV DEFAULT, 3=DIRECT HV DEFAULT, 4=REVERSE LV DEFAULT, 5=REVERSE HV DEFAULT
MV	518	BMS_OCC_WSTBY	BMS OCC with Standby	Write	1=UNOCCUPIED, 2=OCCUPIED, 3=STANDBY

Object ID lookup: Carrier Connect 33TCSPF-4 point IDs by name

AI100ID_SPACE_TEMP
AI101ID_SPACE_HUM
AI102ID_SPACE_CO2
AV100REM_SPACE_TEMP
AV101OD_TEMP
AV102SAT
AV103NET_SP_TEMP
AV104SP_TEMP_CTRL
AV105NET_SP_HUM
AV106SP_HUM_CTRL
AV107OD_HUM
AV108OD_AQI
AV109OD_CO
AV110OD_NO2
AV111OD_O3
AV112OD_PM2_5
AV113OD_PM10
AV114OD_SO2
AV200AN_OUT
AV201NET_GP_AO_OUT
AV300AIR_FLTR_HRS_LFT
AV301OVRD_TIME
AV400OCC_HT_SP
AV401OCC_CL_SP
AV402UNOCC_HT_SP
AV403UNOCC_CL_SP
AV406DEHUM_SP
AV407HUM_SP
AV408SCRN_TMT
AV409HEAT_SP
AV410COOL_SP
AV411ACTV_BCKLT
AV412DRMNT_BCKLT
AV413STBY_HT_SP
AV414STBY_CL_SP
AV500ID_STAGES
AV501OD_STAGES
AV502MAX_HOLD_TIME
AV503AUTO_XOVR
AV504COOL_LOCKOUT
AV505LO_CL_LCKOUT
AV506LO_HT_LCKOUT
AV507DLY_BW_FUEL
AV508CYCLES_HR
AV509MAX_HT_SP
AV510MIN_CL_SP
AV511AUX_HT_LCKOUT
AV512HP_LCKOUT
AV513STG_DELAY
AV514FRCD_STG_UP
AV515DIFFERENTIAL
AV516LINE_FREQ
AV517ID_TEMP_OFF
AV518ID_HUM_OFF
AV519SAT_OFFSET
AV520AIR_FLT_HRS
AV521MAX_SP_ERR
AV522ID_TMP_FLT_INHBT
AV523C02_FLT_THRESHLD
AV524AO_HT_EN_TEMP
AV525WATER_TEMP_OFF
AV526DOOR_OPEN_HT_STPT
AV527DOOR_OPEN_CL_STPT
BV200Y1_OUT
BV201Y2_OUT
BV202Y3_OUT
BV203W1_OUT
BV204W2_OUT
BV205G_OUT
BV206OB_OUT
BV208OCC_OUT
BV209HUM_OUT
BV210DEHUM_OUT
BV211NET_GP_Y3_OUT
BV212NET_GP_W2_OUT
BV213NET_GP_OB_OUT
BV214FAN_LOW
BV215FAN_MED
BV216FAN_HIGH
BV300DOOR_IS_OPEN
BV400WIFI_TIME_SYNC
BV401PROXIMITY_EN
BV402AUTO_DST
BV403WIFI_ENABLE
BV404SETPT_OVERRIDE
BV405BMS_OCC
BV406FLTR_TMR_RST
BV407NET_SP_TEMP_EN
BV408NET_SP_HUM_EN
BV500OCC_IN_POL
BV501ALLOW_AUTO
BV502ALLOW_PROG
BV503CELSIUS_DISP
BV504FAN_WITH_W
BV505RVS_VLV_DIR
BV506HUM_INST
BV507BMS_OCC_EN
BV511CFG_WR_EN
BV512CL_LO_EN
BV513AUX_HT_LO_EN
BV514HP_LO_EN
BV515LO_CL_LO_EN
BV516LO_HT_LO_EN
BV517AO_HT_VLV_LO_EN
BV518DOOR_OPEN_SW_STATE
BV900ID_TEMP_SENS_HI
BV901ID_TEMP_SENS_LO
BV902REM_TEMP_HI
BV903REM_TEMP_LO
BV904HUM_TEMP_HI
BV905HUM_TEMP_LO
BV906ID_TEMP_RNG_HI
BV907ID_TEMP_RNG_LO
BV908HUM_SENS_FAIL
BV909HUM_TOO_HI
BV910HUM_TOO_LO
BV911OD_TEMP_FAIL
BV912SRVR_CONN_FAIL
BV913RTR_CONN_FAIL
BV914WIFI_CONF_FAIL
BV915ECON_FAULT
MV300CURRENT_MODE
MV400USER_MODE
MV401PROX_SENS
MV402SOUND
MV403SCHED_DAY_PARTS
MV404OCC_FAN
MV405UNOCC_FAN
MV406FAN MODE
MV407STANDBY_FAN
MV500ID_EQUIP_TYPE
MV501OD_EQUIP_TYPE
MV502REMOTE_SENSOR
MV503DEHUM_TYPE
MV504OCC_OUTPUT
MV505HUM_OUTPUT
MV506DEHUM_OUTPUT
MV507SMART_RECVRY
MV508GP_OUT_TIMEOUT
MV509NET_GP_Y3_MODE
MV510NET_GP_W2_MODE
MV511NET_GP_OB_MODE
MV512ANALOG_INPUT
MV513ANALOG_IN_SCALE
MV514ANALOG_OUTPUT
MV515ANALOG_OUT_SCALE
MV516ANALOG_OUT_TYPE
MV517NET_GP_AO_MODE
MV518BMS_OCC_WSTBY

Integration notes

Carrier's tables call value objects 'Analog Variable' / 'Binary Variable'; they are AV and BV objects.
Access mapping: READ_ONLY = R; READ_WRITE and GATED_WRITE = W (GATED_WRITE needs BV 511 CFG_WR_EN enabled); WRITE_WHEN_OOS (the three AIs) = R, writable only when the object is out of service.
BV 916 LOCKOUT_FAIL is printed as removed (changed from a fault to a system event) and is left out.
The 33TWSPF-4 has its own guide (11-808-1227-01) with the same object appendix.
Multistate state numbers (1, 2, 3...) follow the printed order of the state list; MV 509 states continue across a page break.

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 Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 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 Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4

How many BACnet points does the Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 have?

This list has 149 BACnet objects: 3 analog inputs, 60 analog values, 58 binary values, 28 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 BACnet points are writable?

97 of the 149 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 Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 BACnet documentation?

The source is Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 Installation Guide (Appendix A, BACnet Objects) (11-808-1226-01), revision 2026-06, published free by Carrier at https://brandportal.carrier.com/asset/18e1e0a0-9538-47b1-b623-d4ea88f27b22/11-808-1226-01.pdf.

What are the minimum BACnet points to integrate the Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4?

Start with MV 400 USER_MODE (System mode: Off, Heat, Cool, Auto, E-Heat); BV 405 BMS_OCC (BMS occupancy command (needs BV 507 enabled)); AV 400 OCC_HT_SP (Occupied heating setpoint); AV 401 OCC_CL_SP (Occupied cooling setpoint); AV 103 NET_SP_TEMP (Network space temperature (with BV 407 enabled)); MV 300 CURRENT_MODE (Current mode status: Off, Heat, Cool); AV 104 SP_TEMP_CTRL (Space temperature used for control); BV 205 G_OUT (Fan output status); BV 200 Y1_OUT (First stage cooling output status); BV 203 W1_OUT (First stage heating output status).

How do I enable BMS control of the Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4?

BMS occupancy is used only when BMS Occupancy Enable (BV 507) is enabled; the BMS then writes BACnet BMS Occupancy (BV 405). Gated configuration objects need BACnet Config Write Enable (BV 511).

Does the Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 need a BACnet heartbeat or have a communication timeout?

Can the BMS supply sensor values to the Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4?

How do I check these points on the real Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4?

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 Carrier BACnet points lists

Source: Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 Installation Guide (Appendix A, BACnet Objects) · 11-808-1226-01 · rev. 2026-06. Object names, instances and units are reproduced as published; descriptions are our own.

Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 BACnet points list

BMS integration notes: Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4

Minimum points to map

Enable & remote start

Heartbeat & communication loss

Sensors & values from the BMS

Network setup

Watch out for

Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4 BACnet objects

Integration notes

Questions about the Carrier Connect Wi-Fi Thermostat 33TCSPF-4 / 33TWSPF-4

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