The solid-state Taco Post Purge Plug-In Card maintains power
to the circulator once the priority zone is satisfied, but does not
fire the boiler. The circulator purges excess heat into the priority
zone, minimizing stand-by loss during warm weather months and
optimizing boiler operation when used with a boiler reset control.
Power can be maintained to the circulator from 20 seconds to 7 minutes
using an adjustable potentiometer. Using the extra set of dry contacts
provided on the card to emulate aquastat closure, you can use the Taco
PC600 with boilers that have an integrated reset control.
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