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Product Description

The TF243 series digital thermostat is designed for 3 speed fan and modulating valve control in a fan coil system, including:

  • 2-pipe cooling only/heating only/manual changeover
  • Ventilation mode
  • Manual or automatic 3-speed fan control
  • Modulating water valve control

Besides the basic controls, TF243 series provide Random Start-up function to maintain power grid stability. In addition, the Memorized Time Off function can automatically turn off the thermostat to save energy. 

Technical Properties

Protection class


Temp. setpoint range 10 ... 32 oC
Additional Descriptions
  • Modulating Output DC 0~10V
  • Auto Cycle times 100,000 times
  • Manual Cycle times 10,000 times
  • Display range 0 ~ 37C
  • Ambient storage limits -30 ~ +60C
  • Humidity limits 5~90% RH, non-condensing
  • Remote temperature sensor NTC20K
  • Pollution Degree 2
  • Protection against electric shock class Class II
  • Rated Impulse Voltage: 2500V
  • Maximum Temperature for relay wiring 155C
Temperature control accuracy +/- 1 oC
Ambient temp. limit

0~ +49C 

Power supply

24(10%)VAC, 50/60Hz 

Product description

Fancoil controller for 2 or 4-pipe systems, black, remote sensor/remote setback input