Issue
TC300 Series & accuracy
Environment
BMS Site
Cause
TC300 Series & accuracy
Resolution
The TC300Series-HotelApplication Stand-alone Digital FanCoil Thermostat specifications are as follows:
There are two sensors possible for the unit. An embedded sensor is NTC100K, and for the external sensor as (below picture) it is NTC10K (3950). This chart defines the NTC Sensor accuracy (not the Control Accuracy which is in the specifications above):
The RS-03 10k NTC Remote Sensor-3m (Meters). Sites that want to extend further than the 3m, should know that the maximum length is 20m, we don't suggest more, but doesn't mean >20m have issues. The problem depends on the Electromagnetic Interference (EMI), Compatibility (EMC) in the field. Every site is different, and it is suggested to try in the field and see if it works fine.
(When a remote sensor is connected (terminals S1 & S2) this remote sensor is automatically used. The internal sensor is ignored.)
Note:
- TC300 thermostat supports Modbus RTU only. If you require LON, consider the SE7000 series controller.
- TC300 series replaces the DEGA 006905432 which is obsolete as of March 2004.
- To control multiple fan coils with one ST300, a connection called the ST-2 is required. This expands the control up to 4 fan coils simultaneously but is not recommended since it may lead to uncomfortable temperatures in building area.
For more info, visit The Exchange with search keywords TC300. The TC300 is only listed in the EMEA and AsiaPAC market. They are not UL approved.
