New WB boiler - with tepid 'hot' water!

[mabazza ritchie]

Evening folks,

So, I am here for some independent advice, if possible. I have just had a Worcester Bosch 30cdi Classic System Boiler installed along with a ?mag filter? and some new radiators. The issue is that the hot water isn't very hot at all. I have turned the thermostat on the hot water cylinder up to 70 degrees; with no noticeable change. I was told at the point of install that the hot water dial on the boiler itself is only for if the boiler is a 'combi' and on my boiler it is essentially useless.

Can anyone make any suggestions as to why the hot water isn't very hot? I have it on for a good while giving it plenty time to heat but it doesn't make any change.

Any suggestions are welcome. Many thanks,

MR

 

[ShaunCorbs]

Time to get the fitters back and ask them and they might need to change a few things

 

[jtsplumbing]

Is heating working ok ? it may be one of your external controls that is at fault or you have an airlock in the pipework to the cylinder, Call back installer . couple of photos of controls for hot water could help.

 

[mabazza ritchie]

The heating seems to be ok. The installer has told me just to turn up the thermostat on the hw cylinder. I will get them back out though; i just wondered if it would be a quick fix that i could do. The image is of the boiler with the left dial being the touch temp of radiators and the right one being the hw temp. The boiler manual states the water temp is adjustable from this dial and makes mention of a ?diverter valve?

 

[ShaunCorbs]

No no no get him out to sort it as your not happy

Do you have any pics of the cylinder and boiler installation ?

 

[mabazza ritchie]

Shaun - i will get a photo in the am. The cylinder was one that was already in the house, just a regular one not the fancy new unvented ones. I have just sent the company an email asking them to come out and take a look.

 

[ShaunCorbs]

Shaun - i will get a photo in the am. The cylinder was one that was already in the house, just a regular one not the fancy new unvented ones. I have just sent the company an email asking them to come out and take a look.

Was the hot water find before the boiler change ?

 

[mabazza ritchie]

The hot water was properly hot - leaving you lobster red after a shower...amazing!

 

[ShaunCorbs]

So they have done something and really upto them to fix / sort it within reason

 

[jtsplumbing]

Reckon its an air lock in the coil.

 

[mabazza ritchie]

True. I just wasnt sure if the new boiler was maybe just now as powerful as the last (Poterton Prima F) or with new boiler being more eco, if this was side effect.

 

[mabazza ritchie]

Hopefully its an easy fix for someone that knows what they are doing then. I'll leave it to them rather than breaking it!

 

[ShaunCorbs]

True. I just wasnt sure if the new boiler was maybe just now as powerful as the last (Poterton Prima F) or with new boiler being more eco, if this was side effect.

Nope the heat should be the same and they might of undersized the boiler but it should still come out like normal

 

[mabazza ritchie]

Thanks for the advice; timber i am happy with, water/electricity & gas all in one...witchcraft.

They thought i was being a bit generous with the boiler size (1 bath, 1 shower, 14 rads) but thats what i asked for.

 

[mabazza ritchie]

A couple of photos as promised.

 

[king of pipes]

Get them back you could try setting different switching times for heating and hot water but its more a wiring or controls issue are you sure its the right type of nest thermostat ? post a picture of your cylinder please Shaun is your man for wiring . cheers kop

 

[ShaunCorbs]

Any of the cylinder?

 

[mabazza ritchie]

As promised

 

[jtsplumbing]

Put system on for hot water only and try the silver vent it may be closed off (Sticking up on top pipe ) screwdriver slot on top.

 

[mabazza ritchie]

That valve appeared to have a fair bit of corrosion around it but opened it and there was a small amount of air came out followed by water.

 

[ShaunCorbs]

Turn the cylinder stat down / back to 60

On the boiler turn the left hand control up from 3 to 5

 

[mabazza ritchie]

Ok, thats done.

 

[mabazza ritchie]

It seems like my hot water is properly hot again! Can i turn the ch dial down again or should it remain at 5? Thank you very much for all the help

 

[ShaunCorbs]

4-5 is normally about right

surprised you didnt say the heating was slightly colder 3 is around 45dc

 

[mabazza ritchie]

We were trialling leaving the heating on all day on a lower setting vs on/off at various times etc. Still not worked it out yet although the nest seems to be good.