Andy Hall wrote:

With 3 port valve systems, the hot water takes priority. This means
that if there is a demand from the cylinder, then the valve opens in
that direction, and the boiler and pump run. This gives much faster

This is true for three port diversion valves. A three port mid position
valve will also allow both to run at once. This is a better proposal for
slow recovery cylinders since it does not divert the heating for too long.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/