Set Square wrote:
In an earlier contribution to this discussion,
Sadly wrote:


Is it usual for programmers on a Y-plan system (or even S-plan) to
allow for HW priority? There seems very little point in buying a
quick-recovery cylinder and finding that it still takes about an hour
to heat the tank because all the radiators are on!

No - neither Y-Plan nor S-Plan provides for HW priority. They both allow for
HW and CH to be on concurrently with *equal* priority.

W-Plan does, of course, give HW priority - but can keep the CH off for a
very long if you *haven't* got a quick recovery cylinder.

Maybe I will come up with a cunning way to add one of these "1-hour
boost" type switches to my Y-plan system to allow the HW to take
priority for a while - this means that when taking a bath I can hit the
boost so that the hot water takes priority for the next hour...

Maybe I will first get the system working as standard and see how long
it does take to recover!