Single stage heating or cooling control with 36" capillary tube with 3/8"x9" bulb. Temperature range from 60-98°F with 3°F differential. SPDT switch rated at 25A@240V. Includes knob.
The Ranco C12 series temperature controls are used where a remote bulb thermostat with a narrow differential is required. The sensing element used a liquid fill which changes volume in direct proportion to a change in temperature.
A popular application of the C control with it's double throw switch is on PTAC heat/cool units where the bulb senses return air. The close on temperature rise terminals are used to control a compressor for cooling; the close on temperature drop terminals are used to cycle resistance heat or a heat pump compressor. In either case, a manual switch or separate temperature control is required for heating/cooling changeover. Other applications of the C series include fan operation on blower coils for space conditioning; heater control for coffee brewers; electric heat hold back control for heat pumps.
