In a schematic, which symbol depicts a pressure switch that opens on pressure rise?

A pressure switch that opens on pressure rise is typically represented in schematics with a specific symbol that indicates its function. In this case, the symbol that depicts a pressure switch opening with an increase in pressure is designed to show a contact structure that remains closed until a certain pressure threshold is reached, at which point it opens the circuit.

In schematics, different symbols are used to represent various types of switches and their functionalities. A pressure switch that opens on a rise in pressure is usually indicated by a symbol that has a break in the line or an open connection when pressure exceeds the setpoint, therefore signaling that the system should stop engaging the related component, such as a compressor or fan. This action is crucial for safeguarding the equipment from damage due to excessive pressure.

Understanding this symbol is important, as it allows technicians to quickly identify the type of pressure switch in a system, aiding in troubleshooting and maintenance tasks. The capability to interpret these symbols accurately ensures that technicians can efficiently service HVAC systems and ensure proper operation. The other symbols presented do not represent this specific function of a pressure switch associated with pressure rise.