No hot water when heating is on.

[jonpeck]

The problem is when the gas central heating is on I get very little hot water out the shower. When the heating is off there is plenty of hot water.

I have set the thermostat to have the hot water come on a hour first to the heating a vi've versa.

It's a potterton superprima and mixer gravity Fed shower.

Thanks in advance.

 

[spanner]

ahaha go on kev

Haa.. greet..

 

[spanner]

thats the diagramme in working off at college next week did an s plan last nite and doing a y plan next week as well

Boiler flow to A and B A=hot water B=radiator Wires grey=hot water White=radiators.. ne knew you were studying for plumbers..

 

[jtsplumbing]

Boiler flow to A and B A=hot water B=radiator Wires grey=hot water White=radiators.. ne knew you were studying for plumbers..

You have the A & B the wrong way , B to hot water, easy to remember B = Bath.

 

[jonpeck]

Jon,

to get a spot on answer to your question these guys here need a lot more information from you, like this.

1) do you have a hot water cylinder, I take you have with this comment " I have set the thermostat to have the hot water come on a hour first to the heating a vi've versa"
2) do you mean the flow of hot water to the shower is bad or the temperature is low
3) has this just happened or as it always been like this since you moved in
4) If you run the kitchen tap and the heating is on is the water temp low then

I will think of some more in a minute my head hurts just now! Answer these first

Tony

1-Yes I have a hot water cylinder. I have a thermostat and have fiddled the setting to have the hot water to come on first then the heating And vice versa.

2-The flow of water is fine when only the water is on. And the heating is off

3-I been like this since we have move in but I was away for the last few months.

4-The temperature from the tap is fine.


Also its a gravity fed shower with water tanks in the roof.

 

[jonpeck]

I have also rang my landlord. Just to make you guys happy!

Its mainly so I have at least a starting point to maybe getting it fixed. Should just act daft and waste his time.

 

[jtsplumbing]

1-Yes I have a hot water cylinder. I have a thermostat and have fiddled the setting to have the hot water to come on first then the heating And vice versa.

2-The flow of water is fine when only the water is on. And the heating is off

3-I been like this since we have move in but I was away for the last few months.

4-The temperature from the tap is fine.


Also its a gravity fed shower with water tanks in the roof.[/QUOTE
Is this the problem, that you are messing with the thermostat ? or do you mean the time control (programmer) if water from taps is OK then fault is with shower, may find that cold water to shower is connected to mains water and not to tank in loft, have you got a separate shower or one that is connected to bath taps ?

 

[happyflyer]

Jon,

can you elaborate on this line, I am confused



2-The flow of water is fine when only the water is on. And the heating is off


If the cylinder is full of hot water you should get hot water at the taps in the kitchen and the bathroom, now what is wrong with that shower, look tell me this, if you run the wash basin tap which is next to the shower, boiler on or off cylinder full of hot water what do you get out of the WB tap, if the water is hot and the shower isn't they are next to each other, it must be the shower valve.thermostat hey, is that possible, tell us step by step.

 

[spanner]

You have the A & B the wrong way , B to hot water, easy to remember B = Bath.

Thanks.. love yiooooo...:biggrinjester:

 

[spanner]

Nope.
Gravity hot water means seperate unpumped supply from boiler to cylinder coil. On this system his hot water cylinder would heat up regardless of the heating being on.

He is therefore likely to be on an s or a y plan with two pipe boiler. As already suggested from the description given its likely to be a balancing issue. Hot water only means heating valve shut and circuit pumps through the coil and gives piping hot water. With demand for both the water takes the path of least resistance which is through the heating circuit to the detriment if the coil.

Brilliantly explained perfected

 

[jonpeck]

Okay.

Just quick simple as I can get explanation.

Hot water on heating on lukewarm shower
Hot water on heating off hot shower
Hot water off heating on cold

When I have the first option the taps are hot.

Today I had just the water on option 2 and didn't get as warm as usual which may point to the shower thermostat as it has to be at 75% to get to just warm. So the help is appreciated guys.

 

[kay-jay]

Okay.

Just quick simple as I can get explanation.

Hot water on heating on lukewarm shower
Hot water on heating off hot shower
Hot water off heating on cold

When I have the first option the taps are hot.

Today I had just the water on option 2 and didn't get as warm as usual which may point to the shower thermostat as it has to be at 75% to get to just warm. So the help is appreciated guys.

Easiest way to tell if its the shower is to wait till the shower is only luke warm and check hw at the taps. If its hot at the taps and only warm at the shower the fault lies with the shower or with the pipe arrangement to the shower.

 

[happyflyer]

Easiest way to tell if its the shower is to wait till the shower is only luke warm and check hw at the taps. If its hot at the taps and only warm at the shower the fault lies with the shower or with the pipe arrangement to the shower.

Kay isn't that what I said 10 posts back, absolutely, hot water you can burn your hand under at sink and wash basin and only luke warm at shower, this is a no-brainer, in broad Bolton or Oldham,
this is like pulling hens teeth, I am off to the day job now, perhaps this will be resolved when I get home, but I am not holding my breath.

 

[spanner]

Kay isn't that what I said 10 posts back, absolutely, hot water you can burn your hand under at sink and wash basin and only luke warm at shower, this is a no-brainer, in broad Bolton or Oldham,
this is like pulling hens teeth, I am off to the day job now, perhaps this will be resolved when I get home, but I am not holding my breath.

Cool down.. you are getting there

 

[spanner]

Kay isn't that what I said 10 posts back, absolutely, hot water you can burn your hand under at sink and wash basin and only luke warm at shower, this is a no-brainer, in broad Bolton or Oldham,
this is like pulling hens teeth, I am off to the day job now, perhaps this will be resolved when I get home, but I am not holding my breath.

Cool down.. you are getting there Grrrreat

 

[kay-jay]

Kay isn't that what I said 10 posts back, absolutely, hot water you can burn your hand under at sink and wash basin and only luke warm at shower, this is a no-brainer, in broad Bolton or Oldham,
this is like pulling hens teeth, I am off to the day job now, perhaps this will be resolved when I get home, but I am not holding my breath.

yes i recall you mentioning it in a previous post.
i dont however recall the op telling us about it so i reposted the info for his benefit in case he missed it first time around

 

[spanner]

Grrrrrrreat...brbShift+R improves the quality of this image. Shift+A improves the quality of all images on this page.

 

[spanner]

How long has this been going on...?? k

 

[jonpeck]

Okay. I have carried out a few little tests.
Test 1-BOTH ON
Hot water from the taps. Luke warm shower
Test 2-Water ON heating OFF
Hot taps and hot shower.
Test 3-Everything OFF
Hot water in taps eventually you can hear the boiler kick inetc
Additional things-
The thermostat knob on the shower is always over 75% turnedincluding the button pressed in. The flow control is non-existent its on oroff.
Above The outlets for the water tank are at the top and aresplit one direct into the power shower pump and the other into the roof.
Boiler is at MAX and thermostat on water heater is at 65.
There is no balancing valve (that I can see)
There are adjustable valves on the hot and cold going intothe power shower pump could I restrict the flow of the cold water?
Its been an on-going thing. Still waiting on the landlord.

 

[happyflyer]

Are we, am I , are you, no result yet Spanner, they are not all happy ending like the films

 

[spanner]

I'm signing in the rain... just singing in the rain.. Oh not a glorious feeling..
I'm just looking at earlier post and doing this 2+2=4-1+1.. .brb

 

[happyflyer]

This is like doing a crossword without the picture and the dog eating some of the pieces and you haven't noticed, never mind Spanner more important than a crappy shower the tubes are running again.

 

[spanner]

Let's hope next week Monday doesn't go like it did again... the weather and the whole place was like West end traffic and the busses were the same.. overloaded and if you're standing on the upper deck the bus "AUTOMATICALLY" does not move which meant you got more traffic bus queues. Heard people talking about it. Not funny

 

[happyflyer]

Spanner,

Just noticed you must live not too far off where Joe Meek lived in Hollaway Rd, if you are into music he wrote Telstar and recorded it in a shop
on the Hollaway Rd, fancy introducing a little bit of culture into UKPF , this will be a first. Where you live must be fully characters, one or two heavy
weights in the 50s and 60s. Perhaps you are much to young, wish I was starting out in Plumbing again, I would be a PFP push fit plumber

[video=youtube;1i0JeAZKvj8]http://www.youtube.com/watch?v=1i0JeAZKvj8[/video]

 

[spanner]

Spanner,

Just noticed you must live not too far off where Joe Meek lived in Hollaway Rd, if you are into music he wrote Telstar and recorded it in a shop
on the Hollaway Rd, fancy introducing a little bit of culture into UKPF , this will be a first. Where you live must be fully characters, one or two heavy
weights in the 50s and 60s. Perhaps you are much to young, wish I was starting out in Plumbing again

[video=youtube;1i0JeAZKvj8]http://www.youtube.com/watch?v=1i0JeAZKvj8[/video]

Starting out. You haven't stopped.. phew good job we weren't talking on a jet flying pilots forum .. hey good music to the ears