Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws

View the thread, titled "Cylinder return valve?" which is posted in UK Plumbers Forums on UK Plumbers Forums.

Ever since the cylinder return balancing valve has been messed with by my kids it hasn't been hot like before what can I do? (as previously I've been told to leave it fully open )
 

Attachments

  • image.jpg
    image.jpg
    564.4 KB · Views: 46
What is the boiler flow temperature set to? and are you allowing it enough time to reheat the cylinder??.
If you feel the return (coil) temperature is it hot/warm or only lukewarm?.
Regarding the return valve, anything more than 1 full turn open from fully shut is quite adequate.
 
What is the boiler flow temperature set to? and are you allowing it enough time to reheat the cylinder??.
If you feel the return (coil) temperature is it hot/warm or only lukewarm?.
Regarding the return valve, anything more than 1 full turn open from fully shut is quite adequate.
Hi there the boiler flow is set to 75 degrees which is the max and for the return coil it is quite hot when the hot water is on. And to confirm one full turn is adequate?
 
You can allways open it fully, if you all ready have it 4 turns open then its almost fully open anyway. If the cylinder is taking hours to heat up then the coil may have scale if its years old.
 
Does the air stop after a few seconds or does it take longer??.
If you have a sealed system ensure boiler pressure at 1/1.5bar, if open vented ensure the (small) F&E tank is "full" of water.
 
I have a 150L HW cylinder with a standard 0.65M2 coil, I took some readings off it when heating a stone cold cylinder from 13C to 60C years ago and my calcs showed that the coil averaged ~ 5kw output from cold to hot, ~ 8kw when cylinder cold and ~ 2kw with a hot cylinder, boiler temp was/is 70C.
Based on that, to heat a 100L cylinder from say 10C to 55C should take ~ 1 hour. A 150L 1.5hrs, 200L, 2hrs etc. These would now be considered very very slow heat up times.
So knowing the volume of your HW cylinde you can get a rough idea from my numbers the heat up time required.
 

Official Sponsors of Plumbers Talk

Reply to the thread, titled "Cylinder return valve?" which is posted in UK Plumbers Forums on Plumbers Forums.

We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.

Thread starter

Joined
Location
Dublin
Member Type
DIY or Homeowner

Thread Information

Title
Cylinder return valve?
Prefix
N/A
Forum
UK Plumbers Forums
Start date
Last reply date
Replies
24
Unsolved
--

Thread Tags

Thread statistics

Created
Eddiez,
Last reply from
John.g,
Replies
24
Views
2,350

Weekly or Monthly Email Digest

Back
Top