Quick Summary
The T6865 modulating thermostat is designed for fan coil units in commercial HVAC systems. It controls a 3-speed fan and a 0–10V modulating valve in 2-pipe systems. The controller manages cooling or heating modes with stable temperature control. It supports either keycard setback or remote sensor input, depending on the model.
This page covers its control logic, basic operation, and how settings are used on the site. It also shows key parameters, wiring understanding, and common questions. Project fit and simple custom options are also included.
T6865 modulating thermostat Functional Highlights
(This section introduces the main control functions and their engineering value in the specific HVAC system.)
(01) 3-speed fan control
This function allows selection between low, medium, and high fan speeds. It helps match airflow to room load and keeps operation stable and comfortable.
(02) 0–10V modulating valve control
The thermostat adjusts the valve output smoothly instead of simple on/off control. This helps keep room temperature steady and improves overall system efficiency.
If one is looking for on/off valve control rather than 0-10V output, one may refer to this model instead (click → T6861).
(03) Remote setback or remote sensor (by model)
Different models support either keycard setback or remote sensor input. This allows flexible use in hotels or larger rooms, depending on project needs.
(04) Timer on/off function
The timer allows automatic start and stop based on daily use. It helps reduce energy waste and keeps operation simple for users.
(05) Blue or green screen (by model)
Different models offer either blue or green screen display. This helps match project design and keeps the screen clear in different lighting conditions.
Display
(This section shows the thermostat appearance, screen interface, or installation dimensions of this specific model.)
Specifications
(This section lists the key technical parameters relevant to this thermostat model.)
| Parameter | Value |
|---|---|
| Power Supply | 24(+/-10%) VAC, 50Hz |
| Fan load rating | 230(+/-10%)VAC, 4(2)A |
| Built-in Sensor | NTC3950, 10K |
| Temperature Accuracy | ±1°C |
| Setpoint Range | 10–32°C |
| Installation | 86×86mm or 3×3 inch box |
| Warranty | 2 Year |
Wiring Diagram
(This section provides the wiring diagram for this thermostat in the relevant HVAC control system.)
Guide
(This section explains what configuration the model code refers to.)
| T6865xxxx series | xx stands for |
| H | H=horizontal |
| 2 | 24VAC power supply |
| W | White housing |
| G or B | G=green screen; B=blue screen |
| M or R | M=Remote Set-Back; R=Remote sensor function |
| Example T6865H2WG-R | 24VAC power supply, green screen, with remote sensor function |
Project Fit & Customisation
(This section describes project suitability, system limitations, and available customisation options.)
This thermostat is not suitable for systems needing BMS communication. It does not support WiFi or app control. It only works with 3-speed fan and 0–10V valve systems. It is not designed for more complex or centralised control projects.
OEM support is available for project needs. Logo printing, colour changes, and labels can be customised. Function changes may be discussed for larger projects. Final details depend on quantity and application.
Certifications
(This thermostat complies with European market requirements and is supported by certifications such as CE)
Exhibition Moments
(Our team regularly participates in international HVAC exhibitions such as Febrava in Brazil, The Big 5 in Dubai, and ISK-SODEX in Turkey, etc.)
Frequently Asked Questions
Q1: Can the T6865 modulating thermostat work with different fan coil units?
This model is designed for 3-speed fan and 0–10V valve systems only. Please check your system type before selection.
Q2: Does this thermostat support external temperature sensing?
Only models with “R” support remote sensor input. If unsure, please contact us to confirm the correct model.
Q3: Can it be integrated into a BMS system?
No, this is a standalone controller. It does not support communication protocols like Modbus or BACnet.
Q4: How does the 0–10V valve control help in daily use?
It adjusts valve output smoothly instead of switching on and off. This keeps room temperature more stable and comfortable.
Q5: What is the minimum order quantity and do you offer samples?
We support samples for testing. Standard MOQ is 300 units, but smaller trial orders may be discussed.
Q6: How can I place an order and arrange shipment?
Contact us to confirm details and receive a PI. We support TT, PayPal, Visa, and EXW, FOB, DAP terms.
Q7: How long does production usually take?
Non-custom samples ship within 7 days. Custom orders take about 3–5 weeks. Bulk orders like 300 units need about one month.
Q8: What shipping methods are available?
Courier delivery takes about 7 days to door. Air freight is around 7 days, and sea freight takes about one month or more.
Need Support?
If you have a project, please feel free to contact us. We can help check your system and suggest a suitable model~
Final NoteIn many HVAC projects, stable control and simple use are important. The T6865 modulating thermostat controls fan speed and valve output in FCU systems. It helps keep operation steady and makes daily management easier for building teams.
