||11-03-2010 08:02 PM
Crown Boiler closed system baseboard heat
I have a crown boiler with summer/winter hookup. It is a closed baseboard heat system, that is to say I do NOT have bleeder valves anywhere on or behind any baseboard cover. All I have is a pressure valve to allow water into the system should it drop below a certain psi level and a drain just below the circulating pump coming off the bottom of the boiler. I have been releasing water from the system in increments and refilling with the pressure valve in different combos and stages. I have managed to get heat upstairs when I add water to the system to the psi level of 30 to 40 psi. But, the system does not circulate and I can hear gurgling upstairs on the return end of the closed circuit of copper pipes. Any thoughts on how to get this air out so the circulating pump will do it's job? Thanks.