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Further to cylinder boost question. I have got VRC700 app working. This shows flow temperature and hot water temperature. This enabled me to see what happens when boost is activated when heating is on: Activate cylinder boost. Flow temp rises to 75-80° On boiler rad symbol goes off and tap...

Set-back.

Just checked ours. In setback mode the desired temperature is shown along with actual temperature.

We don't use cylinder boost a great deal so couldn't say for certain if its timed, however reading the manual would imply it only remains on as required. “…heats the water in the domestic hot water cylinder until the desired domestic hot water temperature is reached or until you cancel the...

We have an Ecotec 428 with a VR66 and VRC470 (now has been replaced with a VRC700). When Cylinder Boost activated, heating goes off, flow temperature increases to between 70 and 80º, and it is usually only active for about 30 - 40 mins, then heating comes on again. Wasn't aware that it was...