A DIY & home improvement forum. DIYbanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » DIYbanter forum » Do - it - Yourself » UK diy
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions.

[?] Worcester-Bosch Greenstar 30CDi - losing pressure



 
 
LinkBack Thread Tools Display Modes
  #1  
Old December 27th 08, 11:36 AM posted to uk.d-i-y
external usenet poster
 
Posts: 51
Default [?] Worcester-Bosch Greenstar 30CDi - losing pressure


We had a Worcester-Bosch Greenstar 30CDi boiler installed about six
months ago. It is working generally fine but I've noticed that about
every couple of weeks the last radiator in the system makes slight
gurgling noises and needs to be 'bled' to let out some air. As a
consequence of doing this ( I presume), the boiler's water pressure
drops slightly because I then have to readjust it back to its normal one
Bar level.

Is a pressure drop with time something to be expected of a system such
as ours or is the air that gets into the radiator an indication that
there may be a leak in the system somewhere? Should I be concerned and,
if so, what is the best course of action for me to take?

Before the boiler was commissioned the installer filled the entire
heating system with a chemical which was left overnight and then flushed
out the next day until the water coming out was completely clean.

The central heating pipework in this house is at least 40 years old so
I'm wondering if this treatment could have caused pinholes to develop in
one or more of the joints. Since the leak, if there is one, is so slight
(at the moment), I'm inclined to do nothing at the moment except to keep
an eye on the system, but I'd really appreciate hearing any comments
from the experts in this NG.

Many thanks, and a Happy New Year to all.

TIA - Dave.

--
David C.Chapman - )
--------------------------------------------------------------------------
Ads
  #2  
Old December 27th 08, 01:14 PM posted to uk.d-i-y
external usenet poster
 
Posts: 2,508
Default [?] Worcester-Bosch Greenstar 30CDi - losing pressure


"David Chapman" wrote in message
...

We had a Worcester-Bosch Greenstar 30CDi boiler installed about six
months ago. It is working generally fine but I've noticed that about every
couple of weeks the last radiator in the system makes slight gurgling
noises and needs to be 'bled' to let out some air. As a consequence of
doing this ( I presume), the boiler's water pressure drops slightly
because I then have to readjust it back to its normal one Bar level.

Is a pressure drop with time something to be expected of a system such
as ours or is the air that gets into the radiator an indication that there
may be a leak in the system somewhere? Should I be concerned and, if so,
what is the best course of action for me to take?

Before the boiler was commissioned the installer filled the entire
heating system with a chemical which was left overnight and then flushed
out the next day until the water coming out was completely clean.

The central heating pipework in this house is at least 40 years old so
I'm wondering if this treatment could have caused pinholes to develop in
one or more of the joints. Since the leak, if there is one, is so slight
(at the moment), I'm inclined to do nothing at the moment except to keep
an eye on the system, but I'd really appreciate hearing any comments from
the experts in this NG.

Many thanks, and a Happy New Year to all.


Have a Magnaclean fitted on the CH return pipe to the boiler. De-sludger
will not remove all the sludge. If there X-400 inhibitor in the system?

  #3  
Old December 27th 08, 04:25 PM posted to uk.d-i-y
external usenet poster
 
Posts: 4,938
Default Worcester-Bosch Greenstar 30CDi - losing pressure

On Dec 27, 5:36*am, David Chapman wrote:
* *We had a Worcester-Bosch Greenstar 30CDi boiler installed about six
months ago. It is working generally fine but I've noticed that about
every couple of weeks the last radiator in the system makes slight
gurgling noises and needs to be 'bled' to let out some air. As a
consequence of doing this ( I presume), the boiler's water pressure
drops slightly because I then have to readjust it back to its normal one
Bar level.

* *Is a pressure drop with time something to be expected of a system such
as ours or is the air that gets into the radiator an indication that
there may be a leak in the system somewhere? Should I be concerned and,
if so, what is the best course of action for me to take?

* *Before the boiler was commissioned the installer filled the entire
heating system with a chemical which was left overnight and then flushed
out the next day until the water coming out was completely clean.

* *The central heating pipework in this house is at least 40 years old so
I'm wondering if this treatment could have caused pinholes to develop in
one or more of the joints. Since the leak, if there is one, is so slight
(at the moment), I'm inclined to do nothing at the moment except to keep
an eye on the system, but I'd really appreciate hearing any comments
from the experts in this NG.

* *Many thanks, and a Happy New Year to all.

* * TIA *- *Dave.

--
David C.Chapman - )
--------------------------------------------------------------------------


A leak should be fixed, it could be the boiler and be under warranty.
For Autos there is flourescent dye you can add to the cooling system,
a high intensity Black Light is used to pinpoint the leak. I am sure
it is done for boilers. I would want to know what was leaking,
especialy if it was the boiler. Is there a water auto feed, How much
water is it loosing, what is boiler pressure cold and hot, Does
pressure increase with temp or is the relief valve wet indicating it
releases. it could be alot of things, even a loose radiator valve.
  #4  
Old December 27th 08, 05:46 PM posted to uk.d-i-y
external usenet poster
 
Posts: 2,231
Default [?] Worcester-Bosch Greenstar 30CDi - losing pressure

On Sat, 27 Dec 2008 11:36:51 +0000, David Chapman wrote:

We had a Worcester-Bosch Greenstar 30CDi boiler installed about six
months ago. It is working generally fine but I've noticed that about
every couple of weeks the last radiator in the system makes slight
gurgling noises and needs to be 'bled' to let out some air. As a
consequence of doing this ( I presume), the boiler's water pressure
drops slightly because I then have to readjust it back to its normal one
Bar level.

Is a pressure drop with time something to be expected of a system
such
as ours or is the air that gets into the radiator an indication that
there may be a leak in the system somewhere? Should I be concerned and,
if so, what is the best course of action for me to take?

Before the boiler was commissioned the installer filled the entire
heating system with a chemical which was left overnight and then flushed
out the next day until the water coming out was completely clean.

The central heating pipework in this house is at least 40 years old
so
I'm wondering if this treatment could have caused pinholes to develop in
one or more of the joints. Since the leak, if there is one, is so slight
(at the moment), I'm inclined to do nothing at the moment except to keep
an eye on the system, but I'd really appreciate hearing any comments
from the experts in this NG.

Many thanks, and a Happy New Year to all.

TIA - Dave.



Take a look at the Sealed CH FAQ.
You might have a tiny leak that is letting air in.
You could try a slightly higher pressure to start with say 1.25 bar.




--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html

  #5  
Old December 28th 08, 10:25 AM posted to uk.d-i-y
external usenet poster
 
Posts: 51
Default [?] Worcester-Bosch Greenstar 30CDi - losing pressure


Many thanks to those who took the time to reply to my posting. Your
comments were much appreciated.

Happy New Year.

- Dave

--
David C.Chapman - )
--------------------------------------------------------------------------
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help! - how do i repessurise a Worcester-Bosch Greenstar 42 CDI bob UK diy 8 July 14th 08 08:55 AM
Worcester Bosch Greenstar 30Si Dougie Nisbet UK diy 3 July 10th 08 08:13 AM
[?] Worcester-Bosch Greenstar boiler - pressure adjustment. David Chapman UK diy 2 June 13th 08 09:23 PM
Worcester Bosch Greenstar boiler freddyuk UK diy 5 December 14th 05 02:49 PM
Bosch-Worcester Greenstar issue Christian McArdle UK diy 33 January 16th 04 10:51 PM


All times are GMT +1. The time now is 07:25 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.SEO by vBSEO ©2010, Crawlability, Inc.
Copyright 2004-2014 DIYbanter.
The comments are property of their posters.