TCY-MT - Modulating
Thermostat for modulating actuators for 2-pipe or 4-pipe applications
TCY-FT - Floating
Thermostat for 3-point floating actuators
TLC3-BCR - On/Off and Floating
Thermostat, 2-pipe for three state valve, 4-pipe for 2 on/off valves
TLC3-ECO-230 - Economizer
Programmable Economizer, compares outdoor temperature with indoor or control temperature, activates free heating or cooling.