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Aug 21, 2022
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Belfast
Member Type
DIY or Homeowner
Hi

I have a Greenstar 8000 Life 30kw system boiler and 250litre indirect unvented cylinder.

The programmable Danfoss time clock is split Rads (controls upstairs rads) Hotwater (controls HW to cylinder).

Ground floor is UFH and has a separate wireless Thermostat that kicks it on and off.

All is firing as per Thermostats and timer settings but I am trying to best set water and rad temps to economise on gas.

I am trying to set rads at 55 degrees and run longer and having the HW at 62deg.

I just noticed that hlwhen the HW was firing the Rad icon was pulsing and the temp on boiler was down at early 50s.

When I fire the UFH via wireless, the RAD symbol pulses too.

When I fire the upper floor rads, again RAD symbol pulses.

My read is that although I have programmed 2 diff temps on the boiler (HW and RADS) , the boiler is only ever looking at that saved for RADS.

Would you agree?

How would this be swapped, via menu settings, Danfoss wiring centre or other?

Many thanks for looking
 

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