fully pumped system, sunvic 3 port valve,grundfos 15/50 pump,worcester greenstar boiler.
I've noticed recently that the vent pipe to the F&E tank is producing a constant trickle of water when I select for hot water alone or heating & hot water. Heating alone does not produce this flow. I also noticed quite a bit of sludge in the tank,much of it orange. I've changed the diverter valve actuator with no effect and the valve itself moves quite freely. I've turned the pump down to 2 but it still happens.
Must there be a blockage in the hot water tank or somewhere?
I've noticed recently that the vent pipe to the F&E tank is producing a constant trickle of water when I select for hot water alone or heating & hot water. Heating alone does not produce this flow. I also noticed quite a bit of sludge in the tank,much of it orange. I've changed the diverter valve actuator with no effect and the valve itself moves quite freely. I've turned the pump down to 2 but it still happens.
Must there be a blockage in the hot water tank or somewhere?