Marvair 70080 Pressure Switch 322057-301 What does the "Normally Open"

What does the "Normally Open" function mean for my system

Does this kit include isolators for 06NA compressors

or intermittent power loss due to high-current draw

75 NPSM threads for direct integration with standard Siemens combustion hardware

Marvair 70080 Pressure Switch 322057-301 What does the "Normally Open"The Marvair 70080 is a critical safety component engineered for Marvair HVAC units and wall mounted air conditioners. This OEM high pressure switch is factory calibrated to maintain system integrity by monitoring high side refrigerant pressures. The Marvair 70080 pressure switch utilizes a precise 400 PSI open 300 PSI close logic, ensuring that the compressor is immediately cut off during an overpressure event and automatically reset once pressures