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 

heating, but no hot water - primatic system

This topic originated from the How to page called Problems associated with radiators
Click here to return to the page called Problems associated with radiators.

 
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
jules.70

from United Kingdom

Joined: 26 Oct 2004
Posts: 9
Location: United Kingdom

PostPosted: Tue Oct 26, 2004 11:04 pm Reply with quote

Changed a valve on one radiator after draining system. Refilled system, bled radiators and balanced. Radiators working fine, but no hot water and the primatic cylinder is cold. There is no bleed valve on it. Also all pipes around cylinder is cold. Also only one header tank. Any ideas of problem and method of solving plz!
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.
croydoncorgi

from United Kingdom

Joined: 06 Jun 2004
Posts: 4024
Location: London,
United Kingdom
Thanked: 332 times

PostPosted: Tue Oct 26, 2004 11:53 pm Reply with quote

Hang on. Why have you got a header tank (for the rads) AND a Primatic cylinder? Are you sure? Also, a Primatic cylinder self-primes and needs no venting.
Back to top
 Alert Moderators
jules.70

from United Kingdom

Joined: 26 Oct 2004
Posts: 9
Location: United Kingdom

PostPosted: Wed Oct 27, 2004 11:23 am Reply with quote

There is definately a tank. The system was working ok until i drained it to fit a new radiator valve.(the old valve was leaking) The radiators are gettimg hot, but i have no hot water. It is one of the very old systems which isnt made any more.
Back to top
 Alert Moderators
jules.70

from United Kingdom

Joined: 26 Oct 2004
Posts: 9
Location: United Kingdom

PostPosted: Wed Oct 27, 2004 11:51 am Reply with quote

Im persuming that the tank is the supply that goes to the cylinder. But like i said before everything was working ok till i changed the radiator valve and then filled the system back up again! The radiators are working fine.
Back to top
 Alert Moderators
PTH

from Vatican City State

Joined: 03 Jun 2004
Posts: 135
Location: Vatican City State
Thanked: 1 time

PostPosted: Wed Oct 27, 2004 12:50 pm Reply with quote

My guess is that the there is an F&E tank for the heating and a Fortic for the domestic water - combined break tank and indirect cylinder. Domestic water not hot in this case is usually due to airlocked coil.

There should be a manual air vent on the pipework near the coil connections to the cylinder, or an open vent to over the F&E tank. If neither of these then you could loosen the upper coil connnection to vent it then do it up again, whilst praying that it won't leak.

Good Luck.
Back to top
 Alert Moderators
jules.70

from United Kingdom

Joined: 26 Oct 2004
Posts: 9
Location: United Kingdom

PostPosted: Wed Oct 27, 2004 2:13 pm Reply with quote

It is a primatic cylinder, which doesnt have a air vent. It doesnt have to have one. It is a complete unit that does heating and water together. Basically that means you cant have one without the other. There are no bleed areas on the tank and until i drained to do the valve it was working ok. Like i said in my other notes, the heating is ok. But i have no hot water now.
Back to top
 Alert Moderators
weargas

from United Kingdom

Joined: 24 Mar 2004
Posts: 632
Location: Tyne and Wear,
United Kingdom
Thanked: 14 times

PostPosted: Wed Oct 27, 2004 3:35 pm Reply with quote

jules,
2 old tricks for clearing possible airlocks in primatic cylinders.

1. run the hot water taps (all of them) for a while. the resulting rush from the f&e tank can clear an airlock.
2. boil it. this involves pulling the thermostat phial out of it's pocket in the boiler and waiting until it boils. this one is only for gas fitters though. if the first one doesn't work you should call out an expert.
Back to top
 Alert Moderators
jules.70

from United Kingdom

Joined: 26 Oct 2004
Posts: 9
Location: United Kingdom

PostPosted: Wed Oct 27, 2004 3:56 pm Reply with quote

weargas wrote:
jules,
2 old tricks for clearing possible airlocks in primatic cylinders.

1. run the hot water taps (all of them) for a while. the resulting rush from the f&e tank can clear an airlock.
2. boil it. this involves pulling the thermostat phial out of it's pocket in the boiler and waiting until it boils. this one is only for gas fitters though. if the first one doesn't work you should call out an expert.

THANKS WEARGAS-EXCELLENT TIPS AAA111+++
Back to top
 Alert Moderators
MANDATE

from United Kingdom

Joined: 06 Mar 2003
Posts: 2286
Location: Manchester,
United Kingdom
Thanked: 128 times

PostPosted: Wed Oct 27, 2004 6:30 pm Reply with quote

Hi Jules. Do I take it then that one of weargas's tricks worked, if so which one cured it?
icon_rolleyes.gif icon_rolleyes.gif icon_rolleyes.gif
Back to top
 Alert Moderators
kevplumb

from United States of America

Joined: 18 May 2004
Posts: 23671
Location: Georgia,
United States of America
Thanked: 918 times

PostPosted: Wed Oct 27, 2004 7:10 pm Reply with quote

wont boiling it blow the bubble ? icon_confused.gif
Back to top
 Alert Moderators
weargas

from United Kingdom

Joined: 24 Mar 2004
Posts: 632
Location: Tyne and Wear,
United Kingdom
Thanked: 14 times

PostPosted: Wed Oct 27, 2004 10:48 pm Reply with quote

kevplumb wrote:
wont boiling it blow the bubble ? icon_confused.gif


it's never happened to me but you should only try it if your confident you know what you're doing (which is why i told him it's an expert job). I was taught these tricks by my father himself an old plumber. The amount of times i come across a primatic problem is very rare now. Long live unreliable combis.
Back to top
 Alert Moderators
jules.70

from United Kingdom

Joined: 26 Oct 2004
Posts: 9
Location: United Kingdom

PostPosted: Wed Oct 27, 2004 10:50 pm Reply with quote

Boiling it would blow the bubble, but only if you let it boil for to long!
Turning all the hot water taps on is a good tip. If that fails then the last resort is to boil it, but carefully!
Problem hasnt been solved, a burst has stopped work and brought the ceiling down!
Im glad its not my house! icon_lol.gif
Back to top
 Alert Moderators
jules.70

from United Kingdom

Joined: 26 Oct 2004
Posts: 9
Location: United Kingdom

PostPosted: Wed Oct 27, 2004 11:04 pm Reply with quote

OH AND BY THE WAY, IM A SHE NOT A HE!!
icon_lol.gif icon_lol.gif icon_lol.gif icon_lol.gif icon_lol.gif icon_lol.gif icon_lol.gif icon_lol.gif
Thanks for all your advice guys icon_wink.gif
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 
Primatic Heating System 6 1220 Mon Aug 25, 2008 5:31 pm
Strange type of primatic system with hot water problem 7 1480 Fri Aug 04, 2006 7:16 pm
Have I broken it, primatic system? 2 660 Sun Jan 04, 2004 9:10 pm
Is this how a Primatic system works? 6 1360 Mon Jan 05, 2004 12:50 am
No HW or even flow on primatic system. 3 980 Wed Aug 24, 2005 11:01 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.