The Efficient Home Forum

I didn't know you could do that! Looks like it's Honeywell parts HCS30 & ACS90.
Thanks for your time.

Yes, it's to cool the boiler. Imagine the heat exchanger in your boiler as a big lump of metal, heated by gas on one side and cooled by water on the other. In normal operation the exchanger will be hotter than the water temperature. Stop the flow of water and gas simultaneously and the metal can't ...

For an S plan system to work with boiler overrun, there should be a (pressure activated) bypass valve fitted. The bypass valve inlet sits in the pipe between the pump output and the motorised valve inlets. The bypass valve outlet goes to the boiler return pipe. When the valves in your system are ...

Hi, As per this thread: https://theevohomeshopforum.co.uk/viewtopic.php?f=4&t=4403&p=12866&sid=88cc6d055acea9af0a1d5eb67b8f5c73#p12866 I'm having trouble with battery life on one of my HR92s. I notice there is a mini-USB socket tucked under a small snap in cap. Presumably this is for manufacturing ...

I have this issue too. I have 11 HR92s in the system. One has terrible battery life. Decent alkalines last about 10 days. I got fed up with that and am using Nmih, which lasts around three days. I have moved the offending HR92 to a different room (same room as the controller( and changed it's ...