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Last seen: Oct 1, 2026
Sorry are you saying this is the return or flow to the ASHP external unit?
@patch321 I expect they are trying to balance the zones?
Lower pump speed = less flow = lower heat transfer. Speed 2 - 20lps at DT5 = 7kW Speed 4 - 30lps at DT5 = 10.5kW Also the ASHPO will have minimu...
Unfortunately it seems to be oversized. I can answer to you points as follows: 1) I would not recommend this unless you are sure you will check that...
@jamespa Yes, it is a balance of transfer using all components of the system so the flow, curve, plate exchange, expansion control and evaporator fan ...
@jamespa sorry James, yes larger surface area, messing with the DT. also this allows even lower running temperature, technically you could over size t...
@johnbroome if it is not the pressure in the expansion vessel then just look for a slow leak somewhere, top up as needed.
@jamespa oh this is very good results on your system, yes, its just for fun and in house training but I am experimenting a few things. 1) I...
@johnbroome `yes, worth checking bladder in expansion vessel for sure.
@johnbroome perhaps, does it rise in pressure when heated and then drop when off?
can you see here it not like a set of steps every 20 mins, it runs flat for 2 or 3 hrs. I also currently have a Vaillant that is running 808hrs for ...
Please see attached graph from 8.5kW Ecodan serving a 244m2 hose new build 2025. see how the return flow is steady. This is dissipating it heat so i...
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