replace circulating pump on boiler system

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Old 02-17-07, 01:30 PM
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replace circulating pump on boiler system

what do i need to do to system after i change pump
 
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Old 02-17-07, 04:36 PM
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Add water back to the boiler, to maintain 12-15 psi, and then bleed the radiators with the pump going. You may want to simply over-pressure the boiler initially by adding about 25 psi worth and then bleed the radiators. When you do, the pressure will drop. If it doesn't drop back to 12-15 psi, then drain some water out of the boiler drain.

If your boiler maintained that 12-15 psi on auto-fill, then you shouldn't have to monkey with that at all. But new autofills have a nice feature where there is a lever on them that allow you to override the auto-fill regulator to dump more water, quickly into the boiler.
 
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