Ceridunn

OK, I understand I should have spent a little more time planning the system. In my defence a little, there aren't many system diagrams that deal with ufh only, they all seem to be systems that include dhw etc Hi, thanks for the comment, I have tried reading up on this but not really found much advise when connecting to ufh only. Of all the additional components you mention I did only miss the expansion tank, important though I know.

I decided to go with ufh in my renovation then decided last minute to put this on a heat pump, so it wasn't really designed just thrown together. Initial advice was as its just ufh on the heat pump I wouldn't need buffer or anything like that. But obviously no one thought to advise on expansion vessels. The pressure has stayed within the max for the heat pump as the temp hasn't got that high yet, so will fit an expansion vessel ASAP!👍

I decided to go with ufh in my renovation then decided last minute to put this on a heat pump, so it wasn't really designed just thrown together. Initial advice was as its just ufh on the heat pump I wouldn't need buffer or anything like that. But obviously no one thought to advise on expansion vessels. The pressure has stayed within the max for the heat pump as the temp hasn't got that high yet, so will fit an expansion vessel ASAP!👍

OK, pump added, it was the one supplied with my manifold, so not pwm, but it does work and now I've got the heat pump running at last. All my loops need to be open on the ufh to get 20lpm, if I close 1 loop it drops to just above 18 so for now won't be using controlled zones. Something I've noticed is the pressure on the manifold goes high, would a simple expansion vessel sort this for now or do I need to go for something more permanent like a buffer or low loss header etc( I want to have controlled zones running next winter so will make changes to allow this some time in the summer)Another thing is I've set the outlet temp at 45 degs, but it doesn't seem to want to go higher than 31, now I'm hoping I just need to make some setting adjustments so need to read through instructions again to see if I've missed anything, but if someone has any ideas to save me a little time that would be great as I'm busy tiling the floors now.

Hi, many thanks. I did look in the cabinet yesterday and couldn't see something that looked like a pump, was hoping it was in there just that I was too stupid to see it! 😜. Will splice the pump I have into the system, so hopefully should have something running later today. BTW I had already watched graham's video on error code 911 low flow rate, will look at a few more! Cheers

Hi, I have just installed a Samsung 8kw R32 Monobloc Air Source Heat Pump, just to run underfloor heating, I was under the impression I would not need an external pump, but I am getting no flow when selecting heat, can anyone tell me if the ashp I have has an internal pump? Cheers in advance.

Hi, thanks, what's the easiest way to short out a flow sensor? The model of heat pump I have installed is Samsung 8kw R32 Monobloc Air Source Heat Pump. Cheers

Hi, thanks will check tomorrow. Just out of interest would the introduction of a pump need something like a buffer, volumiser, expansion tank?

Good evening all, Hi there, decided to follow this as a quick method installation to get the heat pump up and running to make sure the floor is dry so I can start tiling. Connected everything up but the heat pump doesn't seem to create a flow, so I get a flow error. Do all heat pumps have internal pumps? Or have I managed to find one of the only ones on the market that doesn't

Hi Peter, excuse my dumbass question, what do you mean by 20 litre low loss header?

Tell me if I'm wrong, but when you say loops do you mean pipe runs, if so I have 7 loops that were going to be 5 zones. Although I've already prehung the controller, and purchased a WiFi hub and 5 wireless stats, I guess I could leave off the actuators and keep it at 1 zone, but will look at the volumiser. I have now found the installation manual for the heat pump, it was inside the casing, not easy to get in to it without the instructions! 😂😂. I hope the plumbing side will be simple enough. The Samsung controller seems not so straight forward, but as I'm only running ufh I hope this will simplify its installation as some of the wiring to it won't be necessary. 🤞🤞🤞

Thanks, let's see if others comment but I was told I wouldn't need the pump on the manifold solely for ufh. There is more to this than I originally thought as I have already set up the 5 zones etc so maybe that idea will fall by the wayside. Looks like I have more reading up to do. Cheers John. Ps Any other tips please share. 👍

OK, let me see if I have this right, if I keep my zones I need a buffer and will need to fit the pump that came with my manifold. If I have just 1 zone then I don't need the buffer, but in this instance will I need the pump or will the heat pump do that job? (I was under the impression I wouldn't need the pump on the manifold if going direct onto a heat pump). Cheers

Thanks, I will check this, already planned 5 zones for the ufh, so maybe a rethink in order

Hi, thanks for that, you make it sound so easy! Octopus quoted for us at 1 point and that included a 7kw HP so I've been out and bought Samsung 8kw. UFH is already installed approx 700m of pipe from memory. Do I need a buffer tank do you think? I'm also under the impression that I connect the flow and return directly onto the manifold with no need for the pump as the heat pump does this itself(or is this wrong?) Do I need expansion vessel as I see on installations with dhw or are they only for dhw and radiator circuits?