On Dec 19, 10:40*am, "Dave Liquorice"
wrote:
On Mon, 19 Dec 2011 02:19:27 -0800 (PST), thirty-six wrote:
The radiators/remainder of heating system needs a constant
pressure.

Why?

Only in that it makes balancing the sytem quicker.

Which, when doing the balancing it will have, as all the TRV heads
will be removed otherwise you'll end up chasing your arse as they
shutdown or open up.

--
Cheers
Dave.

After all radiators have been initially flow adjusted there is still a
need to go back and check that they are performing according to the
system design. A second adjustment is probable when an auto-bypass is
not fitted. When there is only a minor adjustment to be made after a
complete system check, then it may be assumed that the rest of the
system will remain within tolerance. The auto-bypass, and a preset
one is about 16quid, saves the need to even perform the first system
check after the initial adjustment.