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Pressure switches are safety devices calibrated to specific water column (WC) settings
While the switch can function in various positions
relying entirely on the vapor-pressure sensing element for mechanical actuation
Broad Temperature Range: Operates efficiently between 100°F and 450°F for versatile heating applications
Carrier KAAWS0101AAA Control 321702-401 Pressure switches are safety devicesThe Carrier KAAWS0101AAA Winter Start Control is a critical field installed accessory designed to prevent nuisance tripping of the low pressure switch during cold weather startups. This 24VAC time delay relay (TDR) bypasses the low pressure circuit for the first 3 minutes of operation, allowing system pressures to stabilize when evaporator temperatures are low. It is an essential component for split system air conditioners utilizing low ambient
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