Hot water from Valliant Boiler

[Burger]

Automatic bypass in the boiler according to instructions

 

[Sharp Point]

Automatic bypass in the boiler according to instructions

That block up after a while in a dirty system

 

[Brambles]

Margaret,

It is almost certainly a control issue and not a boiler related problem. Was the Hive system installed at the time the boiler was commissioned, or was it added later? I have seen a number of issues where Hive has been added and not wired in correctly, impacting hot water supply (or lack of it).

In my view, the fact that you can get hot water when the heating is on means that it is unlikely to be a valve problem. You have an S plan with two two port valves. To get hot water and heating together (as you describe) both valves must be opening.

My conclusion, is that the control wiring has been inadvertently changed resulting in the two control valves operating in tandem when Central Heating is called, with no operation when only Hot Water is called.

I assume that when you set the system (the boiler) to deliver hot water only the boiler does not fire up. Is that correct?

It is probably a very easy fix - one wire in the the wrong terminal.

 

[Margaret T]

Margaret,

It is almost certainly a control issue and not a boiler related problem. Was the Hive system installed at the time the boiler was commissioned, or was it added later? I have seen a number of issues where Hive has been added and not wired in correctly, impacting hot water supply (or lack of it).

In my view, the fact that you can get hot water when the heating is on means that it is unlikely to be a valve problem. You have an S plan with two two port valves. To get hot water and heating together (as you describe) both valves must be opening.

My conclusion, is that the control wiring has been inadvertently changed resulting in the two control valves operating in tandem when Central Heating is called, with no operation when only Hot Water is called.

I assume that when you set the system (the boiler) to deliver hot water only the boiler does not fire up. Is that correct?

It is probably a very easy fix - one wire in the the wrong terminal.

Hello, i may recall if correctly, the engineer installed the hive after it was commissioned (im not 100% certain). The hot water schedule runs set time 0645 - 0800; then 1630-2130. Due to no hot water (luke warm), the engineer says to us leave the immersion on constant

 

[SimonG]

Probably a wiring issue from day one but winter masked it.
Nice easy fix for a competent heating guy.

 

[Burger]

Hello, i may recall if correctly, the engineer installed the hive after it was commissioned (im not 100% certain). The hot water schedule runs set time 0645 - 0800; then 1630-2130. Due to no hot water (luke warm), the engineer says to us leave the immersion on constant

Is that Luke warm with heating on or just hot water only?

 

[king of pipes]

Automatic bypass in the boiler according to instructions

Not much use in there bud can't lose any residual heat in the boiler when in pump overun , better to be in the airing cupboard before the controls . Kop

 

[Burger]

Not much use in there bud can't lose any residual heat in the boiler when in pump overun , better to be in the airing cupboard before the controls . Kop

Thanks for that.

 

[Hisham Al-Bizri]

Was your hive fitted with the boiler or after? Is it that it's been wired incorrectly and you haven't noticed due to over winter having the heating on?

 

[Margaret T]

Was your hive fitted with the boiler or after? Is it that it's been wired incorrectly and you haven't noticed due to over winter having the heating on?

the hive was fitted after the engineer installed the boiler. It was all part of the package. When the boiler was up and running, the hive was then set up and run on schedule timings. Greatly appreciate any advice. Thanks a lot