FC221Pro Multi-Function AHU & Fan Coil Controller EC Fan 0-10V Modbus Thermostat
1. Product Overview
FC221Pro is a universal smart HVAC thermostat for commercial projects. One single panel supports both fan coil units and AHU air handling units, with two power options: 220V mains and 24V AC/DC low voltage. Equipped with multiple output ports to drive 3-speed fans, EC variable fans, 2/3-position water valves and 0-10V PI proportional valves. Two multi-function DI ports connect filter DP sensor, fan fault detector, room door contact and external NTC probe. Standard RS485 Modbus RTU communication, optional 2.4G WIFI for mobile remote control. Built-in password lock, key lock, power-off memory and temperature compensation. Black & white fireproof ABS housing available, can be wall-mounted separately or matched with integrated control cabinet, widely used in hotels, offices, clean labs and factory fresh air systems.
Full Technical Specifications
Category | Item | Standard Value |
|---|---|---|
Basic Info | Model | FC221Pro |
Compatible Equipment | Supported Unit | Fan Coil / AHU Air Handler |
Power Supply | Input Voltage | 100-240VAC 50/60Hz / 24VAC/DC |
Electrical Index | Max Power Consumption | ≤3W |
Temperature Performance | Measuring Range | 1℃ ~ 50℃ |
Temperature Performance | Control Accuracy | ±1K |
Temperature Performance | Adjustable Setpoint | Default 16~30℃, full 1~50℃ |
Display | Screen | 64×42mm LCD with white backlight |
Housing | Material | Fireproof ABS, black & white optional |
Protection | IP Rating | IP20 |
Mounting | Junction Box | EU standard 86 box (60mm inner diameter) |
Weight | Net Weight | 220g |
Ambient | Operating Condition | -10℃~50℃, ≤95%RH non-condensing |
Communication | Standard Port | RS485 Modbus RTU |
Communication | Optional Module | 2.4G WIFI |
Wiring | Max Wire Gauge | 1.5mm² |
I/O Port Definition Table
Port Type | No. | Function Description |
|---|---|---|
Relay DO Output | 1 | Cooling valve switch control |
Relay DO Output | 2 | Heating valve switch control |
Relay DO Output | 4/5/6 | Low / Medium / High 3-speed fan |
Analog AO Output | A01(10) | 0-10V cooling proportional valve |
Analog AO Output | A02(11) | 0-10V heating proportional valve |
Analog AO Output | A03(12) | 0-10V EC fan speed regulation |
DI Digital Input 1 | 13 | NTC / door contact / filter DP signal |
DI Digital Input 2 | 14 | NTC / fan fault / dew point switch |
Communication Terminal | A(15), B(16) | RS485 bus terminals |
2 Four Standard Wiring Control Modes
220V Standard 3-Speed Fan Coil Suitable for hotel & office fan coils. Two relays drive 2/3-wire motor valves, independent 3 fan speeds. DI port connects room door contact for energy-saving standby when leaving room.
220V EC Variable Fan Coil 0-10V analog signal stepless EC fan speed control with on-off valves, ultra-low noise for quiet high-end office HVAC.
24V Proportional Valve Dedicated AHU Special air handler solution, dual AO ports output 0-10V signal for precise cold/hot water adjustment. Two DI ports monitor filter pressure and fan fault in real time.
220V On-Off Valve Commercial AHU 220V mains power with on-off heating/cooling valves. Max native load 660W, external AC contactor required for fans over 5.5KW, compatible with matching control cabinet.
3 Eight Core Product Advantages
Dual-purpose Design For Fan Coil & AHU No separate model procurement, one panel fits two mainstream HVAC terminals, reduce inventory SKU and purchasing cost.
Full Compatibility With Fans & Valves Supports 3-speed fixed fan, EC stepless fan, 2/3-position on-off valve and 0-10V PI proportional valve, matches most mainstream HVAC terminals.
Multi-Signal Real-Time AHU Monitoring Dual dry contact inputs collect filter clog pressure, fan overload fault, door switch and external temperature, automatic early warning for abnormal equipment.
Standard Modbus Building Bus Built-in RS485 Modbus RTU with adjustable baud rates, seamlessly dock office & hotel BMS central control system for unified remote management.
Optional WIFI Remote Access 2.4G wireless module available, users control power, temperature and check faults via mobile APP without on-site inspection.
Multi Anti-Misoperation Protection Password required for parameter modification; all settings saved after power failure; key lock function for public area anti-touch.
Dual Power Optional 220V mains for general commercial buildings; 24V low voltage for clean labs & explosion-proof workshops.
Integrated Matching Control Cabinet 500×400×200mm standard AHU cabinet available, equipped with circuit breaker, contactor & manual-auto switch, full set supply for fans below 5.5KW.
4 Matching AHU Cabinet Spec (For Fan ≤5.5KW)
Cabinet Size: H500mm × W400mm × D200mm
Standard Parts: 3P MCB, 16A AC contactor, auxiliary contacts, 3 intermediate relays, power/run/fault indicator lights, start-stop button, manual-auto switch, 24V valve transformer, FC221Pro thermostat
Control Logic: Manual & automatic dual mode; fault light activates for fan overload & blocked filter, fault signal uploaded to building BMS.
5 Installation & Wiring Instructions
Mounting: Flush installation on standard 86 junction box, black/white casing optional, net weight only 220g.
Wiring Rule: Separate strong & weak current cables, max wire gauge 1.5mm².
Sensor Matching: DI ports support NTC10K (B=3950) temperature probe.
Port Restriction: Only 1 external signal for fan coil mode; maximum 2 detection signals for AHU mode.
Load Notice: Max native output load 660W, external contactor mandatory for high-power fans.
6 Main Application Scenarios
High-rise Offices: Zoned fan coils & whole building fresh AHU BMS central control;
Star Hotels: Energy-saving door linkage for guest room fan coils, lobby fresh air units;
Clean Labs & Hospital OR: 24V low-temp purification air handlers;
Factories & Exhibition Halls: Large-volume fresh air units with complete electric control;
Shopping Malls: Central intelligent management of all HVAC terminals.
