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This document summarizes various protection devices used in HVAC systems, including high and low pressure cutout switches, fuses, and an engine reset switch. The high pressure cutout switch opens a circuit when discharge pressure exceeds 325-400 psig to stop the unit. The low pressure cutout switch opens a circuit when pressure falls below 5-22.5 psig. The system is also protected by fuses located on the interface board or control box. The engine reset switch shuts down the engine in response to issues like

Author

samna6

Language

EN