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For peak HVAC performance
it requires a minimum pressure differential of 5 PSI to open and function correctly
specifically between -10°F and 20°F
System Compatibility: Specifically designed for McDonnell & Miller 47 Series water feeders and 64A Series low water cut-offs
Lochinvar & A.O. Smith 100208393 Pressure Switch 326058-758 For peak HVAC performanceWhen you are troubleshooting a no heat call on a Lochinvar or A. O. Smith high efficiency unit, the Lochinvar & A. O. Smith 100208393 Pressure Switch is often the gatekeeper for the combustion sequence. This OEM air pressure switch is calibrated to a specific set point of 6. 20" WC, ensuring that the induced draft blower is moving enough air to support safe combustion before the gas valve is energized. As an HVAC air pressure switch replacement, this
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