Honeywell TB6575, TB8575 Catalog Page

Fan Coil Thermostats

TB6575; TB8575 Digital Fan-Coil Thermostat

• Simple, intuitive user interface and ease of installation

• Attractive modern styling ideal for hotels and condos

• Digital display of ambient temperature, setpoint, mode icons
when cooling or heating relays operate, when energy savings
mode is active, and fan status

• Four buttons allow manual control of system operation, fan speed,
and temperature setpoint adjustment

• VersaSpeed™ Fan Ramp Algorithm automatically adjusts Low,
Medium, High fan speed

• Optional freeze protection feature that turns on heat, if necessary

• Activity sensing algorithm sets back thermostat to economy mode

• Auto fan rest option sets back fan to auto mode

• Energy savings mode -- external energy savings input from dry contact
such as time switch, occupancy sensor, or hotel cardkey overrides
comfort setpoint with selectable setback heating or cooling setpoints

• Energy savings input configurable as a normally open or

The TB6575A, TB6575B, and TB8575A are a family of Digital Fan­Coil thermostats for residential and commercial applications.
They are great for use in hotels, condos, and school classrooms.
They provide line voltage and low voltage on/off control for various
fan-coil units. The three models provide control of 2 or 4 pipe fan­coil units, 120, 240, or 24 Vac, and manual or automatic heat/cool
changeover. The fan can also be controlled from the thermostat,
which offers three fan speeds (Low, Med, High) and Auto. Valves
and auxiliary electric heaters can be controlled using a relay or
contactor system switch controlled by the thermostat.

Dimensions, Approximate: 3 13/16 in. high x 5 13/16 in. wide x 1 1/8 in.

deep (97 mm high x 148 mm wide x 29 mm deep)

Mounting: Direct mounting on horizontal 2 x 4 in. (50mm x 75 mm)

junction box. Mounts on vertical 2 x 4 in. or 4 x 4 in junction box with
optional wall plate (50033847-001)

Electrical Ratings: 120 Vac, Fan Rating: 6.0 A, Relay Rating: 1.0 A;

240 Vac, Fan Rating: 3.0 A, Relay Rating: 1.0 A

Frequency: 50 Hz; 60 Hz
Operating Humidity Range (% RH): 5 to 95% RH, non-condensing
Display: LCD
Color: Premier White®

Approvals
Canadian Standards Association: Certified
Underwriters Laboratories, Inc: Meets the same requirements as UL-

873

normally closed dry contact

• Proportional plus integral (P+I) control algorithm for
precision temperature regulation

• Selectable C or F

• Adjustable deadband, in auto changeover mode, for heat and cool control

• Adjustable maximum heating and minimum cooling setpoint limits

• Installer setup mode allows changes of operating parameters

• EEPROM permanently retains user settings, including setpoints,
during power loss (no batteries required)

• Capability to display temperature sensor failure for easier troubleshooting

• Optional remote temperature sensor and remote pipe sensor

Accessories:

50033847-001-Adapter plate for mounting TB6575/TB8575 series fan

coil thermostats to vertical, single or double-gang junction box

C7041B2005-20K ohm NTC Temperature Sensor with 6 in. insertion
C7041B2013-20K ohm NTC Temperature Sensor with 12 in. insertion
C7041C2003-20K ohm NTC Temperature Sensor with 18 in. insertion
C7041P2004-20K ohm NTC Stainless Steel Button Sensor, 11/16 in. dia.
C7770A1006-6 in. Duct Probe for Return Air 20 K ohm NTC non-linear

Temperature Sensor

C7772A1004-20 K ohm NTC non-linear Wall Flush Mount Temperature

Sensor without logo

C7772A1012-20 K ohm NTC non-linear Wall Flush Mount Temperature

Sensor with Honeywell logo

TR21-20 K ohm NTC non-linear Temperature Wall Module
TR21-A-10 K ohm NTC non-linear Temperature Wall Module

(for averaging only)

PS20-20 K ohm Pipe sensor

Setting
Temperature
Range Switch Position

Product Number Application

TB6575A1000/U 2 or 4 pipe fan coil,

TB6575B1000/U 2 pipe fan coil, Heat/Cool

TB6575C1000/U 2 or 4 pipe fan coil,

TB8575A1000/U 2 or 4 pipe fan coil,

490 customer.honeywell.com 70-6910

Heat/Cool manual/auto
changeover, 3-speed fan,
120 - 240 Vac

manual/auto changeover,
3-speed fan,
120 - 240 Vac

Heat/Cool manual/auto
changeover, 3-speed fan,
120 - 240 Vac

Heat/Cool manual/auto
changeover, 3-speed fan,
24 Vac

10 C
to
30 C

10 C
to
30 C

10 C
to
30 C

10 C
to
30 C

50 F
to
90 F

50 F
to
90 F

50 F
to
90 F

50 F
to
90 F

OFF-HEAT­COOL-AUTO

OFF-HEAT­COOL-AUTO

OFF-HEAT­COOL-AUTO

OFF-HEAT­COOL-AUTO

HI-MED-LOW­AUTO-OFF

HI-MED-LOW­AUTO-OFF

HI-MED-LOW­AUTO-OFF

HI-MED-LOW­AUTO-OFF

Changeover Description Voltage(C) (F) System Fan

Manual/Auto 3-Speed Fan Coil Thermostat;

Manual/Auto 3-Speed Fan Coil Thermostat;

Manual/Auto 3-Speed Fan Coil Thermostat;

Manual/Auto 3-Speed Fan Coil Thermostat;

2 or 4 pipe Manual/Auto Heat/
Cool changeover, 3 speed fan,
Supply voltage: 120/240 Vac
50/60 Hz

2 pipe Manual/Auto Heat/Cool
changeover, 3 speed fan,
Supply voltage: 120/240 Vac
50/60 Hz

2 or 4 pipe Manual/Auto Heat/
Cool changeover, 3 speed fan,
Supply voltage: 120/240 Vac
50/60 Hz

2 or 4 pipe Manual/Auto Heat
or Cool changeover, 3 speed
fan, Supply voltage: 24 Vac
50/60 Hz

120 Vac
(+/- 10%)

or 240 Vac
(+/- 10%)

120 Vac
(+/- 10%)

or 240 Vac
(+/- 10%)

120 Vac
(+/-10%),

240 Vac
(-15% to 10%)

or 277 Vac
(+/- 10%)

20 to 30 Vac