Re: Know about plumbing?


"spudnuty" <spudnuty@xxxxxxxxx> wrote in message
news:1132850980.518705.159650@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> <colin.watt...@xxxxxxxxxxxxx> wrote
> >No what I have is...
> >Mains in -> 3bar pressure regulator -> Safety valve -> Tank -> Hot taps
and
> >shower
>
> >A closed primary loop (at nominal 1.5bar) circulates water from the
Furnace
> >to either the Rad loop or a coil in the tank to heat the water.
>
> So is it like one of these systems:
>
http://www.eere.energy.gov/consumer/your_home/water_heating/index.cfm/mytopic=13020
>

Yes, this one......

http://www.eere.energy.gov/consumer/images/indirect_water_heater.gif

> And what I don't understand is why it isn't set up like this:
>
1) > Mains in I-> 3bar pressure regulator ->Boiler-> Safety valve ->
> I> heat
> exchanger>I
2) > Mains in---cold water inlet--4.8bar-----------------> Tank -> Hot taps
> and shower

Well it's very similar except the regulator on the secondary circuit (2) is
3 bar not 4.8 bar and there is a 3 bar safety valve in case the tank boils.
I think I need to find data on the tank to see if I can replace these two
with 5 bar parts. That's going to be the best solution.

The primary is sealed and topped up by a tap rather than a regulator. This
tap is normally closed and almost never needs to be used. Perhaps once in
the last five years?




.

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