Description
The Johnson Controls T-8000-4 Bulb Element Thermostat Proportional is a remote-mount thermostat used to switch on/off heating and air conditioning systems. It operates through temperature changes, a filled bulb element is connected through a long capillary tube to the control unit. The filled bulb is sensitive to changes in temperature and expands or contracts in response to these changes and passes these changes through the capillary tube. Proportional control then changes gradually the heating or cooling power in proportion to the difference between the set temperature and the current temperature.
