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I like that this unit has an automatic purge feature for reducing moisture, which is pretty handy for maintaining the system.
NuWhirl Air Activated Blower Controller
AST-201-01-01-04
120VAC 60HZ RATED 14 AMPS max, NEMA/NEMA Plug-in UL1795 Recognized / Meets CSA No. 218
The CAST-201 unit is a stand-alone Air Switch Timer that provides a simple user interface.
This NEMA plug-in module has On, Off, and Timer functions, allowing a Pump or a Blower to operate for up to 20 minutes before shutting itself down. All are operated by an Air Button interface for ease of use.
Auto purge for blower configurations automatically starts 20 minutes after the operation ceases and runs for one minute to reduce moisture in the airlines. This function works even if the blower is turned off before the automatic shut-off.
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