Baxi Combi Central Heating Pressure too high -- HELP

[Martyn Driscoll]

I've had the instant 105 e installed for some months now, but recently we've
altered a few radiators and i've begun too notice that the pressure for the
cetnral heating keeps rising to 3 bars.

How can i stop this from happening, i've contacted Baxi and they told me to
check that the filling loop was disconnected but left me from there, the
filling loop is not present.

I would like to correct this problem myself, i can't afford the call out
charges for plumbers in our area, and its got to be somehtign that i can
resolve, if you need more info on the boiler then follow this link:
http://www.baxi.co.uk/literature/index.html

thank you, your my only hope

Mart

[jeff stonehouse]

i`ve just had a similar problem with a worcester combi
if your filling loop is definately disconnected i would say there is a fault
on the water to water heat exchanger

"Martyn Driscoll" <mart...@ntlworld.com> wrote in message
news:n28xa.628$%q5.1...@newsfep2-win.server.ntli.net...

[BigWallop]

"jeff stonehouse" <je...@j-plumb.freeserve.co.uk> wrote in message
news:ba3bd2$ite$1...@news7.svr.pol.co.uk...

If your system has been running for a while, then the pressure will rise due
to the expansion of the water in the system. It is nothing to worry about
unless it goes away up to something like 4.5 - 5 bar.

Just make sure that all the fill valves are tightly closed, and that the
fill loop pipe is disconnected, and you'll be alright.

BigWallop

[Muddy Paws]

If it is still in warranty call Baxi again and ask for an engineer to call.
to check find the serial number first two digits are the year, second two
are the week (week 1 is first week jan) Warranty is 1 year from installation
or 18 months from date of manufacture if no proof of installation date is
available. It is probably leaking between the plates on the DHW heat
exchanger

Baxi 07806 069069

--
Muddy Paws
(remove muddy paws to reply)
"BigWallop" <BigW...@WallopingHall.co.uk> wrote in message
news:2Ibxa.1514$3z3.11...@news-text.cableinet.net...

[Del]

Check the pressure in the expansion vessel (red round thing), it should be
approx equal to the static head of your system, and what you have
pressurised the system to. This, for a 2 story house is about 0.8bar
(static head + 0.3bar).

You have to check the pressure with the expansion vessel disconnected, or
the system empty of water.

If the pressure is low, pump it up. If the pressure doesn't hold, you need a
new diaphragm fitted, or a new vessel.

Del

"Martyn Driscoll" <mart...@ntlworld.com> wrote in message
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[Michael]

"Martyn Driscoll" <mart...@ntlworld.com> wrote in message
news:n28xa.628$%q5.1...@newsfep2-win.server.ntli.net...

Had a similar problem on our combi...

In addition to the suggested checks, also check for any blockages in the
flex hose between the expansion vessel and the system, in particular the
ends where the hose attaches.

On our boiler the 'T' piece where the flex hose connects (not the expansion
vessel end, the other) had blocked, which prevented the expansion vessel
from doing its job. The pressure would creep up slowly to the point where
the pressure relief valve would open.

Mike.

[Del]

Check the pressure in the expansion vessel (red round thing), it should be
approx equal to the static head of your system, and what you have
pressurised the system to. This, for a 2 story house is about 0.8bar
(static head + 0.3bar).

You have to check the pressure with the expansion vessel disconnected, or
the system empty of water.

If the pressure is low, pump it up. If the pressure doesn't hold, you need a
new diaphragm fitted, or a new vessel.

Del

"Martyn Driscoll" <mart...@ntlworld.com> wrote in message
news:n28xa.628$%q5.1...@newsfep2-win.server.ntli.net...

[Del]

If it goes to 4.5 - 5 bar, the pressure relief valve can't be working. This
is set at 3 to 3.5 bar.

"BigWallop" <BigW...@WallopingHall.co.uk> wrote in message
news:2Ibxa.1514$3z3.11...@news-text.cableinet.net...
>