As a professional plumber with the bill payer's permission this is what I would propose to do for the fix.
1, Move that h/w mv to the primary return.
2, Take that high drop down out of the primary flow so that the flow pipe is level to the top primary flow connection to the cylinder.
3, Fit an air separator to a high point just above the primary flow to the cylinder and connect the cold feed and expansion into this (a little bit 80s I know).
4, Turn the pump down to its lowest setting.
The system will still be running with a very low circulating head, however, carrying out the above work should get the system working.
servotech,
1, Move that h/w mv to the primary return.
2, Take that high drop down out of the primary flow so that the flow pipe is level to the top primary flow connection to the cylinder.
3, Fit an air separator to a high point just above the primary flow to the cylinder and connect the cold feed and expansion into this (a little bit 80s I know).
4, Turn the pump down to its lowest setting.
The system will still be running with a very low circulating head, however, carrying out the above work should get the system working.
servotech,
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