I've just converted our old C-plan into a Y-plan setup. Originally the tank feed and the vent connections went either side of the HW cylinder coil between it and the boiler. The feed on the upper pipe (from boiler to cylinder) and the vent on the return.
In my all new Y-plan I've not moved the feed and vent, and now when the HW is on the pump sends water up the vent pipe. Basically there are two loops - one through the HW cylinder coil, and another via the vent pipe, loft tank, and down the feed. This means we have a plastic tank of steaming water in the loft! Not good me thinks!
I was thinking of moving the vent to be just before the pump, but then I guess it might suck in air. There isn't a lot of head as it's a bungalow.
Where shoud the feed and vent pipes attach?
In my all new Y-plan I've not moved the feed and vent, and now when the HW is on the pump sends water up the vent pipe. Basically there are two loops - one through the HW cylinder coil, and another via the vent pipe, loft tank, and down the feed. This means we have a plastic tank of steaming water in the loft! Not good me thinks!
I was thinking of moving the vent to be just before the pump, but then I guess it might suck in air. There isn't a lot of head as it's a bungalow.
Where shoud the feed and vent pipes attach?