Gravity or Pumped?

[mrshultz]

Mine was a real mess, and all I could do was work out where each cable went, and re-wire. The heating engineer admitted he would not have known where to start, but for me, it was an interesting project.

I also have a relay. In the main, the motorised valve acts as a relay, but I wanted the pump and boiler independent, so needed two sets of contacts, and there is only one set in the motorised valve.

This is not the final plan, but this is how I slowly built up a plan of how it all worked View attachment 395327it took time, and I started in April so finished by the time the winter arrived.

So after all that work, it not really worthwhile heating DHW with the oil boiler, and my boiler heated the house and the flat independently, which was why mine was complex.

So I would have a look at how it works now, if working near enough, then leave it until the summer.

Thanks for sharing

 

[Hugh Jaleak]

Two Cisterns (tanks are sealed vessels, i.e. Hot Water Cylinder), whereas a Cistern is open, i.e. on a WC. Of the two, the smaller will be your Feed and Expansion, the larger the Cold Storage that feeds the Cylinder (and this Hot Water outlets). The two systems are separate, the Hot water being heated by the Boiler via the Cylinder Coil.

The Vent from the Boiler should turn 180° ish and discharge back into the F&E cistern, the Vent from the Cylinder to the Cold Water Storage (CWS) cistern. Would expect the flow from the boiler to go to vent first, then cold feed, then pump, before splitting after the pump to the Cylinder coil and CH. However if yours is different, this is where the fun starts!

Are both Pumps connected in parallel, i.e. they both are on the same pipework run? It does seem to look like it, wondering if someone has fitted a second pump in the past to try and improve circulation through the system.