Product Information
Thermostat - FCU - 4 Pipe/2 Pipe, 2H/1C Heat Pump (air/water source), 1H/1C, 2H or 2C Conventional, BACnet MSTP, Modbus RTU, Sylk, Color Display.
The TC300 thermostat supports building automation connectivity via Wi-Fi or RS485 using BACnet or Modbus, suitable for most commercial applications. Highly configurable, it supports a wide range of equipment configurations including 2/4‑pipe FCU, 1H/1C, 2H, 2C conventional, and 2H/1C heat pump plus water source heat pump. Standard onboard sensors include temperature and humidity, with options for occupancy + ambient light or CO₂.
Features and Highlights
Convenient for Users
- Color capacitive‑touch screen display for intuitive commissioning and user experience.
- Embedded system monitoring screen for equipment and I/O status.
- Customizable inactive display modes: auto dim, always on, or dark mode.
- LED ring indicator shows operational status.
- Flexible schedule configurations: commercial, residential, fixed setpoint, or hospitality.
- Supports multiple languages: English, French, German, Italian, Spanish.
Fast and Flexible Commissioning
- Fast commissioning via Honeywell Connect Mobile app (Wi-Fi models only).
- Supports 2/4 pipe fan coil, 1H/1C, 2H, 2C conventional, 2H/1C air/water source heat pump.
- 1–3 or variable speed fan.
- Dehumidification with/without reheat.
- Service mode for manual output enabling and diagnostics.
- Auxiliary heating options for supplemental types.
- Auto mode for heating/cooling switching based on space temperature.
- Staging control, PID tuning, DAT lockout, modulating control, compressor time delay.
- Integration with external sensors (Discharge air, occupancy, CO₂, etc.).
- Complies with ASHRAE guideline 36‑2021 Section 5.22 for high‑performance operation.
Connected for Facility Managers
- Configurable user types with customizable privileges.
- Customizable daily schedules with up to 10 recurring holidays and 10 special events.
- Up to 4 schedule events per day.
- Flexible fan speed settings for residential scheduling.
- Non‑programmable scheduling and Wi‑Fi configuration.
Specifications
Electrical Characteristics
| Part Number | Power Supply | Standby Power Consumption | Max. Load | Rated Impulse Voltage | DO+DIO Max. Current Limit |
|---|
| TC300B-G, TC320B-G, TC303B-G, TC321B-G, TC322B-G | 24 VAC 50/60 Hz (20–30 VAC) | 1.5 VA @ 24 VAC | 96 VA (all DOs ON) | 500 V | Total ≤4 A |
| TC300C-G1, TC320C-G1, TC303C-G, TC321C-G, TC322C-G | 100–240 VAC 50/60 Hz | 3.3 VA @ rated voltage | 1200 VA @ 120 VAC; 2400 VA @ 240 VAC; 2770 VA @ 277 VAC | 4 kV (Overvoltage Cat III) | Total ≤10 A |
| TC300C-G, TC320C-G | 100–277 VAC 50/60 Hz | 3.3 VA @ rated voltage | 1200 VA @ 120 VAC; 1500 VA @ 240/277 VAC | 2.5 kV (Overvoltage Cat II) | Total ≤10 A |
User Interface
| Display Type | Capacitive touch TFT, 320×240 px, 2.4" diag. |
|---|
| Backlight | LCD (dimmable) |
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| LED Color Ring | Blue (cooling), Orange (heating) |
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Operating Environment
| Ambient Operating Temperature | 32–122°F (0–50°C) |
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| Ambient Operating Humidity | 10–90% RH, non-condensing |
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| Storage Temperature | −40–150°F (−40–65.5°C) |
|---|
| Protection Class | IP20 |
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| Pollution Degree | 2 |
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| Operation Method | Type 1.B Action |
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Technical Specifications — Onboard Sensors
| Parameter | Specifications |
|---|
| Temperature Accuracy | ±1.5°F (0.8°C) from 32–122°F (0–50°C); ±0.9°F (0.45°C) with 95% confidence from 60–85°F (15–30°C) |
| Temperature Control Accuracy | ±1.5°F (0.8°C) from 60–85°F (15–30°C), all models |
| Temperature Display Precision | 1°F (0.5°C), all models |
| Humidity Accuracy | ±3% RH from 20–80% RH @ 25°C (most models); ±3.5% RH for TC320B-G |
| Humidity Display Precision | 1% RH, all models |
| CO₂ Accuracy | ±30 ppm ±3% of reading between 400–5000 ppm (specific models) |
| CO₂ Output Resolution | 1 ppm |
| Occupancy Sensor | 61 GHz Doppler Radar, 120° horizontal field, max 8 m center, 6 m edge |
