Is a standard deviation check and or slope of the datapoints enough to identify an immersion heater by how flat it is I wonder? vs a generally a sloping compressor ramp?
It’s usually very clear by visual human inspection:
- flat constant power draw
- no relation to flow and return temperatures…
- 3 kW…
I have re calculated the daily stats for all HeatpumpMonitor.org systems on emoncms.org and it’s now possible to access the total error time from the system list page, which should make tracking this issue across systems easier.
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Looking good
So looking at one of these error flags it seems to be correctly picking up the minor data outages that happened on various days. I guess 1 enhancement would be quantify the error rate, say as mins/day error rate or such like. Also presumably this is isn’t just picking up “automated detection of heat meter air error” but rather a variety of similar data outage errors as well?
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I posted these in another thread:
Hovering over the Hx value shows the following tooltips: (for air-source)
- H1 = Heat pump compressor only
- H2 = Outside unit only
- H3 = Outside unit + Booster and immersion heater (if installed & used)
- H4 = Outside unit + Booster and immersion heater + Central heating pumps & fans
If Legionella is disabled then it will assume immersion isn’t used and bump up to higher boundary.
If you don’t have “Includes booster and immersion heater” ticked, and haven’t disabled legionella, then the system is considered to be H2.
How do you disable legionella - in my case it is effective n/a?
“No cylinder” should have been considered the same, but isn’t. Needs updating in HPM code.
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I’ve got an ongoing issue with air during DWH runs on a Kamstrup heat meter (that I’m working on resolving. Happened on initial install, has now reappeared as the heating has started kicking in. Have had a session of bleeding the rads, looks like I need to have another go when I can find a good opportunity to run it full blast for a few hours!)
Is there a simple way to calculate (for my own benefit) what the COP is with the energy usage in the error periods excluded?
Hello @Declan90 yes, hover over the data error text to show the tooltip:
In your case:
1427 kWh heat / (376 kWh elec - 42.5 kWh during air error) = 4.3
Fantastic - thank you.
Now just to solve my air issue!
My pals LG system is showing 2kW immersion related data errors, so isn’t showing on the full heatpumpmonitor table.
https://heatpumpmonitor.org/system/view?id=110
Is there any way to clear these off?
And what happens if the immersion kicks in again in the future? Will the system fall off the table again?