The TC300 Series fan coil thermostats are optimized for office building, hotel and residential applications. The TC300 Series can be used for 2-pipe or 4-pipe applications. Their simple design makes them suitable for any contemporary building. They are both easy to operate and install.
The TC300 features microprocessor-based control and a large backlit LCD screen. The LCD display modes include operation status (cooling, heating, and ventilation), fan speed, room temperature, and set-point.
Part Number | Description | Application | Comm. | Real-Time |
TC303-3A2L | FCU Thermostat for 2-position on/off actuator (2-wire) | 2-pipe | None | No |
TC303-3A4L | FCU Thermostat for 2-position on/off actuator (2-wire) | 4-pipe* | None | No |
TC303-3A2LM | FCU Thermostat for 2-position on/off actuator (2-wire) | 2-pipe | Modbus | No |
TC303-3A4LM | FCU Thermostat for 2-position on/off actuator (2-wire) | 4-pipe* | Modbus | No |
TC303-3A2DLS | Deluxe FCU Thermostat for 2-position on/off actuator (2-wire) | 2-pipe | None | Yes |
TC303-3A4DLS | Deluxe FCU Thermostat for 2-position on/off actuator (2-wire) | 4-pipe* | None | Yes |
TC303-3A2DLMS | Deluxe FCU Thermostat for 2-position on/off actuator (2-wire) | 2-pipe | Modbus | Yes |
TC303-3A4DLMS | Deluxe FCU Thermostat for 2-position on/off actuator (2-wire) | 4-pipe* | Modbus | Yes |
IR-300 | TC3xx Infrared Remote Control** | |||
RS-03 | 10 kΩ NTC Remote Sensor – 3 m (10 pcs)** |
* Can be changed from 4-pipe system with 2-wire motorized valve, to 2-pipe system with 3-wire motorized valve.
** For use with deluxe models only
Sensing element | 10 kΩ NTC (3950) |
Accuracy | ±1 °C |
Set-point range | 5 … 35 °C |
Display range | 0 … 50 °C (shown in 0.5 °C increments) |
Operating temperature | 0 … 45 °C |
Operating humidity | 5 … 95 %RH (non-condensing) |
Power requirement | < 1 W |
Power supply | 85 … 260 Vac, 50/60 Hz |
Terminals | Can be connected to 2 x 1.5 mm2 or 1 x 2.5 mm2 conductors |
Switch current rating | 5 A resistive, 3 A inductive @ 230 Vac |
Switch power rating | Max. inrush 1385 VA / 150 W |
Protection class | IP30 |
Housing | Flame-retardant PC |
Dimensions | 88.5 x 86 x 16 mm (3.48” x 3.38” x 0.63”) |
Hole pitch | 60 mm (standard) |
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
A qualified person is one who has skills and knowledge related to the construction and operation of this electrical equipment and installations, and has received safety training to recognize and avoid the hazards involved. NEC Article 100
If this product is used in a manner not specified by the manufacturer, the protection provided by the product may be impaired. No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material.
Control system design must consider the potential failure modes of control paths and, for certain critical control functions, provide a means to acheive a safe state during and after a path failure. Examples of critical control functions are emergency stop and over-travel stop.
WARNING
LOSS OF CONTROL
Press Eco button to start the energy-saving mode. If the thermostat runs in cooling mode the temperature will be set to 26 °C automatically and the fan will operate at low speed. If the thermostat runs in heating mode the temperature will be set to 18 °C automatically and the fan will operate at low speed. To exit the energy-saving mode, press Eco again or press
Energy-saving mode of occupancy sensor: This can be switched
to the energy-saving mode by room card and occupancy sensor. For example, after room key is taken out, if the thermostat is in cooling mode, the temperature will be automatically set at 28 °C and fan is on low speed; if the thermostat is on heating mode, 16 °C will be set automatically with fan operating at low speed; the mode that guest has previously chosen will be switched back after the room key is plugged in.
Sleeping energy-saving mode: Under this mode, the thermostat will set temperature from 12 p.m. with 1 °C up or down every one hour and mode is ended at 3 a.m., with a total change of 3 °C. Under cooling mode, the temperature for sleeping mode will not exceed 26 °C; under the heating mode, no less than 18 °C will be set on. The thermostat will set the temperature from 4 a.m. with 1 °C down or up every one hour, until it comes back to the degree that the guest has previously chosen at 7 a.m.
During power-on, press and hold M button for 3 seconds to enter the display screen. Press M button again to select hour, minute, week, working day timing on, working day timing off parameters. Press
Pressing and holding
If the thermostat is switched off and the room temperature drops below 5 °C, the thermostat will start automatically for heating and display the
In the event of an operating exception, the thermostat will attempt to command the valve to close, place the device in an inoperative state and display
During power off, press and hold M button for 5 seconds to enter the display screen. Press M button again to select the parameters as shown in the table below. Press
Notice: This parameter table must be set by specialized installation personnel authorized by Schneider Electric. Any inconvenience or damage caused by unauthorized operation will not be covered by warranty.
No. | Parameter | Factory Default | Function Description |
01 | Low-temperature protection | OF | OF: Low-temperature protection deactivated On: Low-temperature protection activated |
02 | Fan operation status after temperature setting is reached | 01 | 00: Fan off 01: Fan on |
03 | Selection between 2-pipe and 4-pipe systems | 00* 01** | 00: 2-pipe system 01: 4-pipe system |
04 | Address setting | 01 | 01 … 32 Address selection range |
05 | Sleeping mode | On | On: Sleeping mode activated OF: Sleeping mode deactivated |
06 | 12/24-hour timing setting | 24 | 24: 24-hour 12: 12-hour |
07 | Mode selection | 00 | 00: FCU cooling or heating 01: FCU cooling only 02: FCU heating only 03: Thermal valve heating |
* TC303-3A2L / TC303-3A2LM / TC303-3A2DLS / TC303-3A2DLMS
** TC303-3A4L / TC303-3A4LM / TC303-3A4DLS / TC303-3A4DLMS
Notes:
Provide an approved disconnecting means and overcurrent protection to supply conductors. The disconnecting device(s) shall meet the relevant requirements of IEC 60947-1 and IEC 60947-3 and shall be suitable for the application. Locate and mark per local requirements.
Standalone
The TC303 thermostats come with the option of Modbus communication for both 2- and 4-pipe configurations. Modbus is an open, widespread and well established serial communication protocol used within building automation. The support of Modbus communication allows simple integration of the TC303 thermostats to a building management system, using standard Modbus serial communications. The following models provide support for Modbus connectivity:
The TC303 thermostats communicate as a Modbus RTU slave device over a serial RS-485 connection, allowing for the transfer of real time data. The RS-485 communication parameters cannot be adjusted and are fixed as follows:
The actual Modbus address of the thermostat can be set for each individual device on the RS-485 network. The address is defined
via the parameter menu on the thermostat itself. The address range available is from 01 to 32 and is defined under menu item 04 of the parameter settings. For full details on this and other parameter setting options available, please refer to the relevant section of this installation guide.
Connection to the RS-485 network is made via dedicated terminals on the back of the thermostat and marked A (+) and B (-).
The following Modbus register types and formats are supported:
Function Code | Register Type | Data Type | Data Format |
01 | Read Coils | Boolean | Binary/Digital |
02 | Read Discrete Inputs | Boolean | Binary/Digital |
03 | Read Holding Registers | Word | 16-Bit Unsigned Integer |
04 | Read Input Registers | Word | 16-Bit Unsigned Integer |
06 | Write Single Register | Word | 16-Bit Unsigned Integer |
Function Code 01
Reg. Address | Register Description | Value Definition |
1 | Cooling Valve in 4-Pipe Application | 0 = Off, 1 = On |
5 | Fan Speed Status – High | 0 = Off, 1 = On |
6 | Fan Speed Status – Medium | 0 = Off, 1 = On |
7 | Fan Speed Status – Low | 0 = Off, 1 = On |
8 | Heating Valve in 4-Pipe Application | 0 = Off, 1 = On |
Function Code 02
Reg. Address | Register Description | Value Definition |
3 | Embedded Temperature Sensor Status | 0 = OK, 1 = Fault |
4 | Remote Temperature Sensor Status | 0 = OK, 1 = Fault |
Function Codes 03 and 06
Reg. Address | Register Description | Definition |
3 | Thermostat Mode | 0 = Off 1 = On 2 = Frost Protection1 |
4 | Operating Mode | 1 = Cool 2 = Heat 3 = Ventilation |
5 | Room Temperature Set-point | Temperature (5 to 35 °C) |
6 | Fan Mode | 0 = High 1 = Medium 2 = Low 3 = Auto |
7 2 | Unoccupied Room Temperature Set-point (Cooling Mode) | Temperature (22 to 32 °C) |
8 2 | Unoccupied Room Temperature Set-point (Heating Mode) | Temperature (10 to 21 °C) |
9 2 | Sleep Mode | 0 = Disable 1 = Enable |
10 | Eco Mode | 0 = Disable 1 = Enable |
11 1, 2 | Occupancy Status | 0 = Unoccupied 1 = Occupied |
12 2 | Unoccupied Fan Speed Mode | 0 = High 1 = Medium 2 = Low |
13 | Keypad Status | 0 = Unlocked |
1. Read only.
2. DLMS models only.
Function Code 04
Reg. Address | Register Description | Definition |
1 | Actual Room Temperature | Temperature (0 to 50 °C) |
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SCHNEIDER ELECTRIC TC300 thermostat Installation Instructions
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