Daikin Altherma, ESPAltherma & Home Assistant with OpenEnergyMonitor

[tiger_cook (Neil)]

@squarepeg77

Edit: with my current observations, I actually think that I need a slightly higher WD curve. I think the heat pump spends too long trying to drive down the return temperature, before eventually settling and achieving 5C dT. My system doesn’t seem to (like to) produce return water less than about 32C - it’s radiators with a volumiser. I’ve been wondering if some radiators are open too much and letting some warm water return.

hi @squarepeg77 I started this thread to dial in the daikin system, could you post your configurations to compare and build on the knowledge base? Hope it helps…

HELP - Daikin Configuration WD curve and modulation with a Madoka room thermostat

My heat pump is identical to yours, somewhat of a self install with an heat pump company supplying the unit, cylinder and doing the commissioning. My system is open loop, bungalow, no additional pumps or low loss headers, all brand new underfloor heating at 150mm centres on 100mm PIR between joists. I have no room temperature reference at all at this stage, I’m planning on controlling comfort with the flow meters on my underfloor heating circuits. Does modulation work similarly to overshoot? I’…

ps i changed the modulation from 2 to 4 last night, and that appears to help a little, however its been tricky lately as the outside temps have not really dropped enough to see any differences and I think I am at a point of diminishing returns.