All,

Ive finally got around to looking into the problems posted with my CH
system sometime ago on this thread ...

http://groups-beta.google.com/group/...624e28d6cd9015

.... so I thought Id post an update for those interested.

I opened the bleed valve on the radiator that always needs bleeding
(main bedroom) and set alight to the gas coming out. It did burn with a
small blue flame.

Popped down to Wickes and purchased some corrosion inhibitor. Turned
off the mains water supply. Drained the system down from the lowest
radiator. Put the inhibitor in the tank and put the mains water back
on.

Went around and bled all radiators then put the system back on. Now
only one radiator in the house getting warm. Thought I may have
incurred an air lock somewhere so dragged some water through various
radiators using the drain valve to try and pull water through.

This didnt work. Problem eventually solved by turning on the raditators
one at a time and forcing the water supply through them and bleeding to
remove air. Now all radiators getting hot.

I have also turned down the pump speed as I think the system is drawing
in air as well. So far so good. The system ran most of last night and I
havent needed to bleed any air out of the main bedroom radiator. The
house is also warm enough with the pump speed on low.

I'll keep an eye on it over the next month or so and test any gas I get
out of the system.

Cheers,

CM.

Looks like I spoke too soon. Turned system on this morning to find only
2 radiators getting hot. Also boiler shutting down before thermostat
temp. reached which must mean the water is getting too hot - probably
as its only going through 2 rad's. So I have had to go around shutting
off rads individually and reopened them to get the water flowing
through. Is this just an air lock that hasnt worked its way out yet?
What a weekend - forgot to mention that when i turned off the mains
water yesterday I forgot to re-prime the electric shower and now the
pump on thats making a nice noise as well!!!
CM.

"Charles Middleton" wrote in
oups.com:

Looks like I spoke too soon. Turned system on this morning to find
only 2 radiators getting hot. Also boiler shutting down before
thermostat temp. reached which must mean the water is getting too hot
- probably as its only going through 2 rad's. So I have had to go
around shutting off rads individually and reopened them to get the
water flowing through. Is this just an air lock that hasnt worked its
way out yet? What a weekend - forgot to mention that when i turned off
the mains water yesterday I forgot to re-prime the electric shower and
now the pump on thats making a nice noise as well!!!
CM.

It may well be - I have to restart my system bit by bit after refilling.

I've got several loops

kitchen - 1 rad:
bathroom 1 rad;

2 front rooms 2rads,

the other side of t'hovel, 3 rads.

I open one loop at a time, pretty much in the above order, and blast and
bleed them one at a time.

With more than one rad on a loop, I may do one rad at a time.

(I've found it saves time in the end)

mike

The message .com
from "Charles Middleton" contains these words:

What a weekend


You and me both! I have ALMOST EXACTLY the same problem. In my case I
needed to replace a pipe and clean out some accumulated sludge. The
system worked better before cleaning than it does now! I have a couple
of upstairs radiators getting hot and shutting down the boiler. Turning
those off seems to push air along to other rads that can then be bled
and thence get hotter. Each time I do this the downstairs begin to warm
up and then just go cold again :-(

This morning I tried forcing water up through the donstirs manifold.
This moved a lot of air but has not fixed the problem.


If I find the solution I will mail it to you. Meanwhile if you find the
solution please email to
--
Cheers,

Compo.

The message .com
from "Charles Middleton" contains these words:

Is this just an air lock that hasnt worked its way out yet?
What a weekend

Mike Ring wrote:

I open one loop at a time, pretty much in the above order, and blast and
bleed them one at a time.

Compo wrote:

\snip\
This morning I tried forcing water up through the donstirs manifold.
This moved a lot of air but has not fixed the problem.

Apart from the obvious spelling mistakes the above turned out to be the
solution to my problem after all. In desperation I reconnected the hose
to the downstairs manifolds and, with all downstairs rads open and
upstairs (which were operating after a fashion) closed, forced water up
through the system (both sides in turn) until it escaped through the
header tank overflow. This appears to have moved my airlock around and
immediately masses of air appeared in two of the radiators. After
repeated bleeding the system appears to be getting back to normal. I am
currently opening each of the upstairs rads in turn and bleeding the air
from them.

--
Cheers,

Compo.

compo wrote:

Apart from the obvious spelling mistakes the above turned out to be
the
solution to my problem after all. In desperation I reconnected the
hose
to the downstairs manifolds and, with all downstairs rads open and
upstairs (which were operating after a fashion) closed, forced water
up
through the system (both sides in turn) until it escaped through the
header tank overflow. This appears to have moved my airlock around
and
immediately masses of air appeared in two of the radiators. After
repeated bleeding the system appears to be getting back to normal. I
am
currently opening each of the upstairs rads in turn and bleeding the
air
from them.

Thanks for the update.

My system is still playing up. The only way I can get all radiators to
now work is to close them all and then open then one by one. However,
whilst doing this I am bleeding each radiator and NO air is coming out
- I havent a clue where this airlock is. I have also advanced the pump
speed from 1 up to 2 in an effort to apply more pressure to the system
and force the air around to *somewhere*. Im stabbing in the dark to be
honest so any suggestions are more than welcome.

CM.

"Charles Middleton" wrote in
oups.com:


My system is still playing up. The only way I can get all radiators to
now work is to close them all and then open then one by one. However,
whilst doing this I am bleeding each radiator and NO air is coming out
- I havent a clue where this airlock is. I have also advanced the pump
speed from 1 up to 2 in an effort to apply more pressure to the system
and force the air around to *somewhere*. Im stabbing in the dark to be
honest so any suggestions are more than welcome.

CM.

Have you got a noticeable high poin it your piping, or maybe more than one.

You may need bleed points there; you can get manual, (cheap) or automatic
(dear, and may be unreliable)

There are other possible places for an airlock, like in the motorised valve
area - look for any highish loops in your piping.

HTH

mike

On Sun, 9 Jan 2005 16:30:31 UTC, "Charles Middleton"
wrote:

My system is still playing up. The only way I can get all radiators to
now work is to close them all and then open then one by one. However,
whilst doing this I am bleeding each radiator and NO air is coming out
- I havent a clue where this airlock is. I have also advanced the pump
speed from 1 up to 2 in an effort to apply more pressure to the system
and force the air around to *somewhere*. Im stabbing in the dark to be
honest so any suggestions are more than welcome.

A suggestion I saw on here a couple of weeks ago, which worked for me
just before Christmas....

Close off all but one radiator. Bleed a substantial amount of water
(about a pint) from that one. Turn the system on and wind the pump up to
maximum speed. Repeat in turn for other radiators. This finally fixed an
airlock I'd been chasing for weeks.

--
Bob Eager
begin a new life...dump Windows!

The message .com
from "Charles Middleton" contains these words:

My system is still playing up.


Errr....so is mine :-( I came home from work this evening to find the
downstairs rads cold once again - ARGH! the system used to work so it
should work again. I have drained the system again and started afresh,
filling steadily. My main 22mm piping runs the entire length of the
house under the floorboards and may be collecting air somewhere along
that length. I am bleeding carefully and anxiously await heat.

To be continued.

--
Cheers,
Compo

The message
from compo contains these words:

I am bleeding carefully and anxiously await heat.
To be continued.
--
Cheers,
Compo


Still bleeding and still getting some air out.

--
Cheers,
Compo