Recent content by will3h

Absolutely D_Hailsham, I agree with you. But the ridiculous point is that currently the Horstmann Programmer in place handles CH and HW separately, which it shouldn't do, and is anyway useless as the CH pump will flow cool water from the store to the radiators. And as it's a rather poor...

wow, many thanks echo the husky; I think I'll get to it tomorrow! I take it that personally, you favour nest over hive as well?

I couldn’t find any wiring plan or details about installing a nest on a gravity/semi pumped. Would you have any docs on this by any chance?

mmm... so I have the choice between Hive that is almost guaranteed to work with my system, but not as widely used and recognised as Nest, that will be more complicated to fit on my gravity system... what to do, what to do...

Also, it looks like people with a similar setup to mine are using Hive, which supports gravity fed systems. Is it preferable, or only due to the fact that Nest didn't support HW until the v3 earlier this year?

Thanks D_Hailsham. That's probably what I should do in the long run. But it's a large job. In the meantime, I wanted to try to mitigate the headache I have with this system, and replacing the antiquated controls with a smart thermostat seemed like a place to start, first to avoid going back and...

Thanks! I had found the notice but doesn't really help to figure out if I can improve the current controls with a Nest? That is what I have been doing so far, and actually what it does is this: the boiler heats up the tank until the optimum temperature is reached and the tankstat makes it stop...

After careful review, what I actually have and mistook for a HW tank is actually a Flowmax Thermal Store with a 2 pump system. So basically the pump controlling hot water is a closed circuit with the boiler, and the CH pump circulates it to the radiators (hence, taking it from the mains). I...

You’re right I should have led with that. Sorry. My understanding would be that, just like the current system, in the winter I should put the hot water on always on and the tankstat will regulate the need for the boiler to kick in. It’s just that I find it not energy efficient (nor...

Thanks for confirming all this! Seems it’s all good to proceed then. Just a thought however: currently, the way the system is designed, I need to have HW programmed at the same time as CH for the radiators to be hot. (Turning CH on only will not trigger the boiler, only the pump that will just...

Hi, I have what seems to be a complex system with a Worcester Greenstar RI condensing boiler, a hot water tank with two pumps for HW and CH, a Horstmann C21 programmer, linked to a Drayton Digistat+ wireless thermostat. I'd like to replace them with a Nest V3, but I discovered a nightmare of...