Honeywell
T6861H2WB
T6861 Series • HVAC Controller
Quick Info
Type
HVAC
Application
FCU
Probe Inputs
1
Relay Outputs
4
Panel Size
120x80 mm
Output Functions
R1
Heat Valve
R2
Cool Valve
R3
Fan Low
R4
Fan High
Digital fan coil thermostat with heat/cool control
Technical Specifications
Display & Interface
| Display Type | LCD |
| Display Digits | 3 |
| Buttons | 6 |
| LED Indicators | Heat, Cool, Fan |
Power Supply
| Voltage | 230V AC |
| Voltage Range | 220-240V AC |
| Frequency | 50/60Hz |
| Power Consumption | 4VA |
Sensor Inputs
| Probe Inputs | 1 |
| Probe Type | NTC (built-in) |
| Temp Range | 0 to 50°C |
| Accuracy | ±0.5°C |
Relay Outputs
| Relay Outputs | 4 |
| Relay Rating | 5A/250VAC |
Physical
| Panel Size | 120x80 mm |
| Depth | 35 mm |
| IP Rating | IP20 |
| Weight | 180 g |
Operating Conditions
| Operating Temp | 0 to 50°C |
| Storage Temp | -10 to 60°C |
Wiring Terminals
| Terminal | Function | Type | Wire Color |
|---|---|---|---|
| L | Power L | Input |
brown
|
| N | Power N | Input |
blue
|
| Y1 | Heat Valve | Output |
red
|
| Y2 | Cool Valve | Output |
blue
|
| G1 | Fan Low | Output |
green
|
| G2 | Fan Medium | Output |
green
|
| G3 | Fan High | Output |
green
|
| COM | Common | Output |
white
|
Important: Always disconnect power before wiring. Verify terminal numbers with the actual controller label before connecting.
Parameter Settings
| Code | Parameter | Range | Default | Description |
|---|---|---|---|---|
| SP | Setpoint | 5 to 35 | 22 °C | Room setpoint |
| MD | Mode | 0=Off, 1=Heat, 2=Cool, 3=Auto | 3 | Operating mode |
| FS | Fan Speed | 0=Auto, 1=Low, 2=Med, 3=High | 0 | Fan control |
| dB | Deadband | 0 to 5 | 1 °C | Neutral zone |
| SL | Setpoint Low | 5 to SP | 16 °C | Min setpoint |
| SH | Setpoint High | SP to 35 | 28 °C | Max setpoint |
| CF | Temp Unit | 0=°C, 1=°F | 0 | Display unit |
Error Codes
E1
Sensor fault
Solution: Contact service - built-in sensor
Frequently Asked Questions
Press MODE button to cycle through Off/Heat/Cool/Auto
Press FAN button to cycle through Auto/Low/Med/High
The neutral zone where neither heating nor cooling operates
Alternative Models (Cross Reference)
Dixell XH260L
Carel FCU
Manufacturer Information
Brand: Honeywell
Country: USA