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Pumping away ? I must have something messed up! Help
So new boiler install and i followed the pumping away guide to avoid pressure issues but something is not working. Piped as follows boiler, ball valve, air purge with vent on top water fill and expansion tank on bottom, inlet side of primary pump,(taco 0011) ball valve and then back to the boiler. piped as primary secondary system. two secondary loops with closely spaced tees and each have their own pump, one with another taco 0011 and the other small loop with a b&g?
So with the boiler and pumps off the static pressure of the boiler is at 12psi. turn the boiler and pumps on and the pressure climbs and climbs until it eventually pops the p/t valve at 30psi. i have eliminated the press red valve and the bypass valve by closing the system off between the p.r.v. and the boiler with a guage on the prv side the pressure maintains and does not climb until i open the valve to the system and the pressure starts climbing again.
WHAT AM I DOING WRONG???