Question for the plumbers

Ebe_Scrooge

We've just moved into a new house, and the heating is confusing me. It's a MegaFlo system, which if I understand correctly stores the hot water in the tank, but when you turn on the taps it's fresh water that comes out, rather than from the tank itself - I think there's some sort of heat exchanger mechanism.

That may or may not have a bearing on the problem I've got. At the moment we've got the boiler timed to come on to heat the water. There's a digital control timer which allows you to have the central heating and water to operate independently. So we've got the water on timed and the heating off at the moment.

However, when the boiler kicks in for the water, the radiators are getting hot. We've turned them off using the individual valves on the rads at the moment, but this shouldn't be happening, should it ? I did think there may be a problem with one of the valves in the boiler, but the odd thing is that it's just the downstairs rads that get hot, the upstairs one's are staying off as they should. If anything I would have thought the upstairs would get hot first if it's just a faulty valve ?

Any suggestions, or things I can check before I call out an engineer ?

Many Thanks.

AdrianW2

Ebe_Scrooge wrote: »

We've just moved into a new house, and the heating is confusing me. It's a MegaFlo system, which if I understand correctly stores the hot water in the tank, but when you turn on the taps it's fresh water that comes out, rather than from the tank itself - I think there's some sort of heat exchanger mechanism.

The Megaflow is an unvented cylinder, i.e. the contents are under mains pressure. When you turn on a hot tap it is the hot water in the tank that comes out not fresh water, it's just under mains pressure.

What you describe sounds more like a thermal store.

Sorry I can't help with your problem.

Ebe_Scrooge

Thanks for the clarification, I did wonder if I had misunderstood the setup :-)