Dhw partial load - hot water range rating vaillant

mrbg07546 · 5 Nov 2022

I have a vaillant boiler which I’m tweaks (627 system boiler)

Range rating talks a lot about d.00 but I noticed there’s also DHW partial load d.77

It’s set at 22kw , I have a 250L cylinder which I have in for 2 times a day for 30 minutes.

What should I set it too?

Johntheo5 · 5 Nov 2022

If the boiler hasn't DHWP (hot water priority) it won't know it's on HW only? But I think 22kw is a reasonable setting, but depends on the coil rating as you want to get back to CH duty as fast as possible

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Dhw partial load - hot water range rating vaillant

mrbg07546

Johntheo5

DIYnot Local

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