Hi Mike,
I’m not aware of any way to do that directly within the myUplink app. Personally I run a small utility script every minute which pulls back the parameter readings using the myUplink API and stores those in a database which I then interrogate using some graphing software which enables the ‘overlay’ functionality for multiple parameters. My background is in enterprise IT systems so I chose to use some fairly ‘heavyweight’ tooling that I happened to have previous experience of but which comes with quite a steep learning curve. For me, it pays dividends because I can combine the myUplink readings with other data sourced from elsewhere - e.g. for the MVHR temperature sensors. I’d be happy to provide further details if you wish but if that sounds like it might be outside your comfort zone you may have more success (or at least good results more quickly) with an alternative approach.
You should be able to achieve the same effect by downloading multiple CSV files covering the same time period then graphing those using a spreadsheet application, if that’s something you’re more familiar with.
Thanks for the photo. The pipe layout looks clear enough and I can infer a few things about the pipework disappearing into the floor - though not the full picture:
- BT6 in the middle of the Megacoil cylinder is correct - NIBE also refer to that as the ‘control’ sensor for DHW (i.e. the Heat Pump heats the Megacoil until BT6 registers the ‘target’ DHW temperature)
- BT7 at the top of the Megacoil cylinder is also correct - that doesn’t get used for ‘control’ but NIBE say it’s the ‘display’ sensor for DHW
- The Red-topped 3-way Diverter Valve is on the Flow from the Heat Pump, sending that to either the Megacoil DHW cylinder or to the UFH manifolds.
- I generally wouldn’t expect to see any additional Valves, so that’s fine.
- The Black Pump is on the Return to the Heat Pump
- The Silver Pump is a bit more unusual. According to the Megacoil manual that’s on the “Secondary Return” into the DHW cylinder, forming a circuit with the “Hot Outlet”
- Is that for a DHW circulation loop that runs around your house and reduces the time taken to receive hot water at the taps?
- If so, do you know how that pump gets controlled? (I’m just curious… it’s not something I’ve seen before but I know there are different schools of thought on the ‘best’ way to ensure hot water is available when required without losing too much heat into the house)
- The plumbing associated with the UKV Volumiser tank isn’t what I was expecting and I can see why you’d be struggling to match that with the NIBE documentation.
- It looks like the UKV might be connected as a ‘bypass’ between Flow and Return - in which case the placement of the BT25 sensor on the pipe at the bottom of the UKV doesn’t seem right to me (because that’s the ‘Return’ side)
- To be sure, are you able to confirm which pipes connect to the UFH manifolds - is it the ones below the Silver Pump, the left-most pair of insulated pipes going into the floor (with the 90 degree bends a few inches above floor level)?
- Another recent NIBE ASHP thread discussed an installation with a ‘bypass’ Volumiser tank where BT25 (on the ‘Flow’ side) is reading low. That might be worth a read if you’ve not seen it already: Nibe F2040-12kW Please help - quite significant difference between BT12 and BT25 sensors
I had an enjoyable Christmas thanks, although now I’m developing cold-like symptoms which indicate I caught something off one of the younger family members, which might make New Year’s Eve less fun. I trust you had a good time too, if you celebrate at this time of year.
David