Hot water / heating not independent on programming

[teb100]

Hi all,

I have a Newlec NLH21 programmer running a Trianco Redfyre oil boiler. The system has a hot water storage tank and only 1 motorised valve.

If I press the hot water boost button on the programmer it does as expected and heats hot water only. However, when I programme the system to come as specified times it only allows me to set a programme for hw and heating together.

I am being really stupid or is something set up incorrectly please?

Thanks in advance.

 

[teb100]

Any ideas?

 

[denso13]

Sounds like that's how it's supposed to work.