Weather compensation curve on ecodan - what's happening at the right-hand end?
It makes sense that at the cold set point on the curve, you choose a max flow temp and at colder outdoor temps the flow temp stays at that level. But what happens at the warm end? If it followed the same logic it would keep heating with the minimum flow temp even if the ambient temp is 25C. I observed the system (when warm outside so no heating needed) raising the flow temp to the minimum, then stopping the recirc pump and only heating the water again when the thermistor reading dropped below a certain offset (despite no circulation!). Bizarre.
I know I can just turn the system off and I have now put it in 'summer' mode where it waits for a certain duration of cold before turning on. I would just like to understand better the 'why'. Surely the curve should just finish at the upper set point rather than having the plateau on the RHS? Am I missing something?
- 26 Forums
- 2,406 Topics
- 54.6 K Posts
- 460 Online
- 6,092 Members
Join Us!
Worth Watching
Latest Posts
-
RE: Recommended home battery inverters + regulatory matters - help requested
Ok. I am concerned that the earthing arrangement being ...
By Batpred , 6 seconds ago
-
RE: GSHP WOES! Midland based engineer recommendations?
Welcome to the forums @johnbroome. I'll see who in my n...
By Mars , 16 minutes ago
-
Post-Traumatic Heat Pump Stress Disorder
This was never supposed to be like this. Heat p...
By Mars , 25 minutes ago
-
RE: Rate the quality of your heat pump design and installation
@razz stick with it. There's loads of advice on here. ...
By Stopbar , 56 minutes ago
-
RE: ASHP Energy Consumption: Aira 12kW heat pump
@wally Hi I am not sure how large your house is b...
By TechnoGeek , 60 minutes ago
-
Please help with the settings ecodan
I have a 160 square meter house, first floor 6 radiator...
By nose1972 , 1 hour ago
-
RE: Predicted Heat Loss & Needs from MCS calcs vs EPC vs actual
I've been thinking along similar lines to @tim441 from ...
By Sheriff Fatman , 1 hour ago
-
RE: Setback savings - fact or fiction?
Hi @sunandair Thanks. The chart shows all the power/...
By RobS , 2 hours ago
-
Thanks, @technogeek. Good to hear about the accuracy. ...
By Majordennisbloodnok , 2 hours ago
-
RE: Advice for a novice on Mitsubishi Ecodan 6kW
In my case it was a very specific pattern of behaviour ...
By Sheriff Fatman , 2 hours ago
-
RE: Vaillant aroTherm not heating with many faults
@ashp-bobba Yeah I'll give it a go, will check filter...
By Anon67 , 2 hours ago
-
RE: RDSAP10 effect on existing heat pump EPC rating?
@transparent Perhaps the names at the end of the docume...
By Toodles , 2 hours ago
-
RE: Heatpunk Floor plan issues
@jamiejones85 A2A they will design on dynamic heat loss...
By ASHP-BOBBA , 3 hours ago
-
RE: Considering MLCP (Multi-Layer Composite Pipe) for ASHP
I think the concern was about crud being forced from th...
By iotum , 3 hours ago
-
RE: Fan unit Making terrible noise HELP!!
can you post a video looking inside, at and through the...
By ASHP-BOBBA , 4 hours ago
-
RE: Heat pump not reaching flow temperature
@davec Ive had a look at the screenshots. Lots of th...
By JamesPa , 16 hours ago
-
RE: Power outages and storms: A surprisingly good DNO experience
Agreed, which is no more nor less than a customer shoul...
By Majordennisbloodnok , 21 hours ago
-
RE: Running from backup generaor in powercut?
@batpred In our case, 3 times each day when the Octopus...
By Toodles , 21 hours ago
-
RE: New Fogstar 15.5kWh upright solution
@batpred Here's the latest Fogstar ready built pack....
By Bash , 23 hours ago




