Wingover

The picture is from a different time I just used it to put the temps on so you can see. The plastic gauge showed 31c when I took the measurements. It is not as cold so I will wait until all zones are on and take several measurements at that time. I can choose on the ASHP to run it's own pump (not the one by the buffer tank) on several different modes. 1. Delta T 2. Automatic flow 3. Capacity adjustment from 10% to 100%

with a laser gun

So I checked when the system was running and here is a picture with the temps next to each port. I guess the incoming temp is not going directly to the floor manifold

I checked the temps at the buffer tank but all zones were closed (pump still runs) I get 35C or very close to it in all 4 ports. I will check it again when all zones are open and the heat pump has to work hard.

How do you control that? Since some rooms are off and the pump starts pushing water back through the balancing valve (on top in the picture from before)?

Sure. It is off right now but later today I will. I will get some insulation as well. Didn't think you lose much since it is inside the house.

Unfortunately, it doesn't seem to be the case. I noticed that if the flow is at 35c the tank shows a bit less (maybe 30c) Yes, that does happen.

I have two manifolds (two floors) with 8 zones each. I have thermostats in each room and I adjusted the flow for each loop. Can you explain a bit regarding the primary and secondary flow rates? Do you mean the heat pump own water pump and the pump I have after the buffer tank? How do you go about that? Here is a picture of the tank (and orange) pump.

No mixing valve. Just a (spring) bypass between in and out after the pump. Pump has 3 speed settings on it. I was told I don't need a mixing valve as I run "low" temp heat pump since there are no radiators.

Thanks for the reply. Yes, 4 port 100L tank the plastic temp dial is about 2/3 up from the bottom. When you say flow temp, do you mean inlet or outlet temp control? I did setup a weather compensation curve.

Hi All, need some help understanding the best configuration of the air to water heat pump. I currently have an LG Threma V outdoor unit connected to domestic hot water tank and a buffer tank for the UFH. When running in the UFH mode the unit is set for 36c temp but my buffer tank (built in) temp dial shows 30c all the time. I am wondering if it is best to set up the outdoor unit to run on Delta T (7c) pump setting or continuous flow? Do you also setup the control to look at outlet temp or inlet temp?

The unit is HM071MR.U44. I thought that the sensor is built in and doesn't have a cable attached to it but I am not sure. Any idea regarding this specific unit?

Hi All, Having an issue with the AI setting in Auto mode for heating. I set the min-max temp and everything seems fine during the late evening/night. In the late morning if the sun is out it is heating the outside unit and the OAT sensor reads about 5c more than the real outside temp and the heat pump lowers the LWT according the the "false" reading. I am wondering if the sun is heating the metal panels of the heat pump so the sensor is reading the wrong temp. If this is possible, can the sensor be moved to the area between the wall and heat pump where there is always shade?

It says 0.3. Also, the buffer tank is still low temp. It did go up about two degrees but no more... 😞

It seems that the temp in the buffer is creeping up slowly so it looks like on the right track. Thanks for the help! So my pump shows: Head pressure 4.7m Liter per Minute 39 W (I assume watts??) 63 With that info can you figure out the bypass valve setting?

Okay, all zones are open and I turned it to the 0.3 and now I don't hear a flow. Could that have been my buffer tank mixing issue?

Okay, so if I am hearing water flowing past the valve while all zones are open, there is an issue with that valve?

I can hear the water slowly flowing past the bypass valve right now. If I increase (turn towards the 0.50) a little I can hear it flowing much more. I should not hear any flow?? I adjusted the pump to the mid flow setting. Less and the head pressure is at 2.7 meter and flow is way too low.

From the ceiling and up yes. I haven't insulated the pipes from the tank to the ceiling. I will. Is the valve set correctly? The upstairs manifold is 3.8 meter above the orange pump in the picture.

I adjusted each loop's flow based on length and it seems that all rooms heat up evenly. What else can I look at? Here are two pictures of the setup. What is the flow control valve? should it be adjusted?

Mine are insulated all the way to the manifolds. I'm going to take a few pictures and post the setup.

The temp sensor is as you said a mechanical one that sits in a pocket and not like the DHW tank that has a real sensor that feeds the heat pump controller. The ASHP sits about 2m from the outside wall and the buffer is about 3.5m from that wall so in total about 5.5m. The pipe is insulated. I was looking at the temp while the UFH was running for about 5 hours and the LG controller was showing 40c out 31c back. The incoming temp into the two manifolds was about 34c.

Much appreciated, Is there a way to "fix" the mixing and have a better equal temp as you explained?

Thank you for your answer. The buffer tank has 4 pipes in it and in the center of the tank there is a round temp gauge.

LG Therma V monoblock set up for DHW and UFH. The DHW is set at 50c and seems to be accurate on the mechanical gauge on the tank itself vs the temp prob of the LG. The buffer tank is 100L and the LWT on the LG is set to 40c but the tank gauge shows +/- 31c. Is the buffer tank temp of the mechanical gauge the average between the 40c coming in and the 32c coming back from the manifolds? Or do I have a problem? I thought that setting up the LG to 40c would be 40c inside the buffer tank.