2-Wire vs 3-Wire Valve Actuators: How to Match an FCU Thermostat?
2026-10-21 [ Digital Thermostats ]
“Does your FCU thermostat work with a 3-wire valve?” Before answering, we need to see the actuator’s wiring diagram. Some 3-wire actuators require separate opening and closing circuits. Others use a permanent power supply ......
EPBD and BMS Retrofit: How to Select FCU Thermostats for Room-Level HVAC Control
2026-09-08 [ Digital Thermostats ]
The revised Energy Performance of Buildings Directive (EPBD) is pushing European buildings toward better energy performance, smarter control and more digital building operation. For commercial buildings, this is especially relevant to HVAC ......
On/Off vs 0-10V Valve Control: How to Choose the Right FCU Thermostat?
2026-08-12 [ Digital Thermostats ]
When selecting a thermostat for a fan coil unit, people often focus first on whether the system is 2-pipe or 4-pipe, or whether the fan is 3-speed or EC. Valve control is just as important. A thermostat designed for an On/Off valve cannot a......
Siemens RDF310 Replacement Guide: How to Select a Compatible Fan Coil Thermostat
2026-07-21 [ Digital Thermostats ]
The Siemens RDF310 has been widely used in hotels, offices, apartments and commercial buildings for controlling 2-pipe fan coil units. When an RDF310 fails or becomes difficult to source, many buyers begin looking for an alternative. The ma......
FCU Thermostat Not Working? 10 Common Causes and Solutions
2026-06-26 [ Digital Thermostats ]
>> Introduction An FCU thermostat is the control center of a fan coil unit (FCU) system. It regulates room temperature by controlling the fan speed, water valve, and, in some cases, communicating with a Building Management System (BMS......
