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......
Honeywell T6861 Replacement Guide: Is BT02-FCU a Suitable Alternative for Modern HVAC Projects?
2026-06-03 [ Digital Thermostats ]
Introduction The Honeywell T6861 has been one of the most widely used fan coil unit (FCU) thermostats in hotels, office buildings, apartments, hospitals, and commercial projects worldwide. As buildings undergo renovations and ......
Common FCU Thermostat Wiring Mistakes in Commercial HVAC Projects
2026-05-12 [ Digital Thermostats ]
In commercial HVAC projects, many FCU thermostat problems are actually caused by wiring mistakes during installation rather than thermostat failure itself. We have seen situations where: ● the fan runs continuously, ● the val......
