Recent content by Glyn Lloyd-Jones

I really appreciate you taking the time to help me out. Ok, the manual says system boiler, so I can confirm that it's not a combi. Ok, I get that, but I was comparing it to how it works when I run the boiler with the built-in timeswitch. If I program the built-in timeswitch and force the...

Thanks for chipping in. Although it doesn't explicitly say whether it's a combi or not anywhere, neither in the manual nor on the boiler itself, here is a cylinder (Ariston Primo ITI 210) with a built-in immersion heater (which I have never turned on), which I assumed was just for DHW. When the...

Thanks for replying. Of course you're right about the DT90E, it's the thermostat, the programmer is ST9400C, my bad. So is it wired up wrong? The Ariston manuale says to connect the room thermostat in series with the programmer, so how can it know when heating is off rather than just the...

First of all let me thank you for taking the time to read my post. I don't really have a problem as such, but I am confused about my central heating setup. I recently moved into a house with an Ariston Clas HE boiler, external programmer (Honeywell DT90E) and room thermostat. The timer built...