On modern condensing units, low-pressure control switches are largely superseded by thermostatic-control switches. A thermostatic control consists of three main parts: a bulb, a capillary…
Category: Control Devices
Solenoid valves are used in many heating and cooling applications. They are electrically operated. A solenoid valve, when connected as in Fig 14-10, remains open…
Relays are a necessary part of many control and pilot-light circuits. They are similar in design to contactors, but are generally lighter in construction so…
One of the control devices is the power relay. It is one of the most often used controls for controlling compressors in refrigeration and air-conditioning.…