Insure that piping between the air separator and the plain steel expansion tank is pitched at least 3 degrees to facilitate the migration of captured air.
Central heating air separator piping diagram.
2 referring to pumps heating p ch 1 p ch 2 as 2 et 2 p 3 p 4.
Pipe size of hydraulic separato r 1 1 25 1 5 2 2 5 3 4 6 max flow rate gpm 11 18 26 40 80 124 247 485.
They are different products for different purposes and you can t really compare efficiency between the two.
So it is quite likely that the way it is currently installed is contributing to the pumping over.
This is a diagram of the obsolete one pipe pumped system.
A new separator is about 20 so it might be worth installing a new one.
Hydraulic separators must be properly sized to provide proper hydraulic air and dirt separation.
These air pockets can actually restrict or block flow in a hydronic piping system.
One pipe systems were originally fitted and add ons to coal fires with back boilers.
As 1 et 1 p 1 p 2 fcu cooling primary pumps secondary pumps secondary pumps primary pumps air dirt separators.
An air separator is an in line device that removes entrained air microbubbles that is moving with the flow of the fluid.
Piping air dirt separator expansion tank secondary pumps p b 1 p b 2.
Integrated piping systems zheating cooling fire protection condenser water trade.
Dirt separators if cleaned regularly have low pressure loss characteristics important for reducing energy demands and ongoing running costs.
Excessive air within a system can cause excessive noise reduce the accuracy of control valves and the performance of heating and cooling equipment therefore removal is important.
There are a few systems like this remaining in use but generally they are approaching 50 years of age or fitted by a diy installer with a very old book of how to fit central heating.
They do have a reputation for blocking up with.