Johnson Controls T23A-1 Thermostat Refrigerant It operates on a 12-40Vdc

It operates on a 12-40Vdc supply and provides a standard 4-20mA output

this part is the current official replacement and provides full backwards compatibility with all systems previously utilizing the 100167689 or RLY2108 sequence

this valve ensures balanced hydronic flow and consistent heat distribution across the radiator circuit

a red LED for relay activation and a flashing pink LED for timing status

Johnson Controls T23A-1 Thermostat Refrigerant It operates on a 12-40VdcFan Coil Thermostat, 120 240 Vac, Low Med High Fan Switching, Heat Off Cool System Switching, 50 to 90 Degree Teperature Range, 1 3 4 Degree Heating Differential, 2 1 4 Degree Cooling Differential T23A 1 is identical to T23A 1C