DIYnot
Local | Network
   DIYnot > Forums
Local | Network
DIYnot Network Local DIYnot Network Local  
  Forum IndexForum Index     RulesRules    HelpHelp     Join FREERegister Free     About CookiesCookies     SearchSearch     LoginLogin 

main medway automatic


 
Post new topic   Reply to topic    DIYnot.com Forum Index > Plumbing and Central Heating
Search this topic :: View previous topic :: View next topic  
Author Message
btic

from United Kingdom

Joined: 15 Aug 2006
Posts: 3
Location: Merseyside,
United Kingdom

PostPosted: Tue Aug 15, 2006 11:01 am Reply with quote

I have a main medway automatic which supplies a shower through mixer taps. The hot water is ok through the normal taps but not through shower. Is the problem likely to be the diaphragm and if so is it easy to replace? Has anyone got MIs
Back to top
 Alert Moderators

If you do not want to see this advert, click here to login or if you are new click here to join free.
Paul Barker

from United Kingdom

Joined: 04 Aug 2005
Posts: 9248
Location: Yorkshire,
United Kingdom
Thanked: 750 times

PostPosted: Tue Aug 15, 2006 8:07 pm Reply with quote

MI's are available on the Baxi website Main belong Baxi. I know that because when I was trying to fix one and rang Baxi for service information the nice man said that they are definately on there but hard to find. I never did find them but they are there.

Failing that ask them to send you a copy.

Is it the diaphragm? Depends what flow rate from the other tap inspires it to light, then check with Baxi if that is correct, if not fit a diaphragm.

I'd sooner have a Brittony II to change the diaphragm on.

You'll probably knacker the two small copper pipes and will need a new seal which the pin slides through, and have to take the whole thing off and on a few times before you have it leak free again.

GOOD LUCK, horrible machines.
Back to top
 Alert Moderators
ChrisR

from United Kingdom

Joined: 24 Jul 2003
Posts: 23353
Location: London,
United Kingdom
Thanked: 1072 times

PostPosted: Tue Aug 15, 2006 8:37 pm Reply with quote

Here http://www.partsarena.com/baxi/

you will find all these:

Basic (Later Production) (GC No. 5247625)
Medway Super L (GC No. 5247641)
R (Late Production) (GC No. 5247628)
Super (GC No. 5247639)

Is the "Automatic" a different one?
Back to top
 Alert Moderators
ollski

from United Kingdom

Joined: 08 Oct 2003
Posts: 4919
Location: Birmingham,
United Kingdom
Thanked: 55 times

PostPosted: Tue Aug 15, 2006 8:49 pm Reply with quote

ChrisR wrote:

Is the "Automatic" a different one?


Always thought the medway automatic was only for lpg?
Back to top
 Alert Moderators
ChrisR

from United Kingdom

Joined: 24 Jul 2003
Posts: 23353
Location: London,
United Kingdom
Thanked: 1072 times

PostPosted: Tue Aug 15, 2006 9:20 pm Reply with quote

Went into Identiffier and it looks like you're right Oilski. Automatic only listed for LPG. Parts Numbers for diaphragm etc are not same as any of the others I looked at.
Back to top
 Alert Moderators
superskanker

from United Kingdom

Joined: 11 Jul 2006
Posts: 49
Location: Manchester,
United Kingdom

PostPosted: Tue Aug 15, 2006 10:24 pm Reply with quote

The hot water is ok through the normal taps but not through shower


probably the shower thermostat then, assuming its a thermostatic shower
Back to top
 Alert Moderators
Agile

from United Kingdom

Joined: 26 Jun 2004
Posts: 52984
Location: London,
United Kingdom
Thanked: 3343 times

PostPosted: Tue Aug 15, 2006 10:36 pm Reply with quote

Clearly ( to me ) the flow rate through the shower is not sufficient to turn the water heater on.

Confirmation by measuring the flow rate through tap and then through shower.

Solution to either clean the holes in the shower head or drill them out to increase the flow rate.

Proper solution, measure flow rate and then change diaphragm if heater needs more than 2.5 li/min to turn on.

Tony Glazier
Back to top
 Alert Moderators
btic

from United Kingdom

Joined: 15 Aug 2006
Posts: 3
Location: Merseyside,
United Kingdom

PostPosted: Wed Aug 16, 2006 2:09 pm Reply with quote

The shower works off a mixer tap regulated by a governor on the cold feed. The same problem occured 6 months ago and I replaced the shower mixer and head which worked. The governor has also been replaced in the last few years. Hence everything between shower head and water heater are relatively new which seems to point to diaphragm unless mixer/governor have gone faulty
Back to top
 Alert Moderators
OllieN

from United Kingdom

Joined: 31 May 2006
Posts: 61
Location: Bournemouth,
United Kingdom

PostPosted: Wed Aug 16, 2006 2:57 pm Reply with quote

Could it just be build up of limescale in the shower head restricting the flow (hence the new shower head fixed it 6 months ago)? Maybe just try descaling the head for a quick fix?

Sorry Tony, just read your post and you've already suggested this.
Back to top
 Alert Moderators
Agile

from United Kingdom

Joined: 26 Jun 2004
Posts: 52984
Location: London,
United Kingdom
Thanked: 3343 times

PostPosted: Wed Aug 16, 2006 6:06 pm Reply with quote

I think that the further information may be a significant clue!

Can you adjust the outlet pressure on the regulator to significantly reduce it.

Tell us what this does.

We also need to know the water flow rate at which the heater turns on when just a hot tap is turned on.

Tony

PS Great minds think alike Ollie !
Back to top
 Alert Moderators
btic

from United Kingdom

Joined: 15 Aug 2006
Posts: 3
Location: Merseyside,
United Kingdom

PostPosted: Tue Oct 03, 2006 11:18 am Reply with quote

As an eplilogue:- finally the shower got too cold so I replaced the diaphragm. It was easier to take the unit off the wall and turn upside down to remove 8 screws to bottom plate of water regulator Everything seems to work ok now. Thanks to any contributors.
Back to top
 Alert Moderators
sasibhushanp

from United Kingdom

Joined: 03 Jan 2007
Posts: 1
Location: Middlesex,
United Kingdom

PostPosted: Wed Jan 03, 2007 12:15 pm Reply with quote

Hi,
I have the Medway Super GC No 5247639 Gas fired water heater. I have the problem as 'btic' mentioned. I am not getting HOT water in the Shower.

Do you know any company who can do servicing this water heater in Middlesex Area? If so, please let me know their Website address as well as their contact telephone details.

Rgds,
Sasi
Back to top
 Alert Moderators
Search this topic :: View previous topic :: View next topic  
Post new topic   Reply to topic    DIYnot.com Forum Index > Plumbing and Central Heating All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
Similar Topics   Replies   Views   Posted 
Main Medway Automatic 3 2360 Sun Oct 09, 2005 8:11 am
Main Medway Super Water Heater- little or big problem? 3 260 Wed Apr 18, 2012 1:57 pm
Main Medway question 2 120 Fri Oct 03, 2014 7:00 pm
Main Super Medway 5 2000 Sun Oct 30, 2005 5:57 pm
Main Medway Super problem 40 2380 Sun Mar 01, 2009 5:49 pm


 
DIYnot
Find an Expert | Find a Supplier | Search DIYnot.com
Network | Advertising | Newsletter
DIY | DIY How To | @home | DIY Wiki | DIY Forum
By using this site you agree to our Terms of Service / Disclaimer.
Please read our Privacy Policy. Copyright © 2000-2014 DIYnot Limited.