Which motor shaft size is compatible with this blade

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Installing against the flow can cause "chattering" or water hammer during operation

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Aaon G024540 Pressure Switch Els PW 17895 Which motor shaft size isThe Aaon G024540 High Pressure Switch is an essential safety component engineered for commercial HVAC units, providing critical protection against over pressurization. Specifically calibrated for R 410A systems, this switch features a 475 650 PSI operating range, functioning as a high limit cutout. As a manual reset pressure switch, it requires technician intervention following an event, ensuring that the root cause of high head pressure is addressed