Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!
Last seen: Jan 12, 2025
Hi Derek, What a result!!............Changed the pump connector to CNP4 and pump no longer runs unless required by DHW call for heat.........proved i...
@DerekM Hi Derek, I have not yet tried swapping the DHW pump connection over although as you have said and from looking through all online manuals...
@derek-m Thanks for your advice Derek.....my system is out of warranty with the installer so I think I will come clean and let them know I have fou...
@harriup The wiring is not correct and the DHW pump is running all the time the primary pump is running....see latest post to @derekm I only run t...
Hi Derek, Been back up in the loft (Big mistake that was)! , and traced cables from pumps to the FTC board As we suspected the FTC is not wired a...
Hi Derek....no wonder you were not at your peak with the amount of input you contribute to the forums. Your assumption of my query could be correct ...
Agree it looks a bit like a rat's nest!! I think I differ in that I have an external plate heat exchanger (not the internal coil )and the dedicated ...
Derek....if you zoom in I think the model no's can be seen but I can clarify the auto pump is UPM3 Auto L(think this is the heating circuit pump)........
The unit came all prewired and plumbed from Mitsubishi so it sounds like it has to be as you have said...I think I will give mitsubishi a call on this...
Hi Derek, Photos as requested, the pump without any obvious manual control is the one adjacent to the one with LED display(the one that data sheets ...
@Sun&Air...thanks for your comments......a lot of water has passed under the bridge since I posted back on page 5 so things have got a bit disjoi...
@derekm and everyone else 😄 I said that I would investigate in more detail what is happening with my full mitsubishi packaged system pumps and have ...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Several AC coupled batteries
That is a good point, a manufacturers can stop trading,...
By Batpred , 10 minutes ago
-
My first question is why bother with the auto balancin...
By JamesPa , 37 minutes ago
-
RE: Indevolt Batteries UK Support & Info Thread
Hi @hanno - good question. The range of hybrid invert...
By Transparent , 40 minutes ago
-
RE: GivEnergy inverter tripping due to over-voltage?
@transparent the inverter was installed in 2021 and afa...
By Tim441 , 59 minutes ago
-
I share the same experience as @majordennisbloodnok hav...
By Old_Scientist , 2 hours ago
-
I agree. So far as I understand, we can't necessarily...
By Majordennisbloodnok , 3 hours ago
-
Did you try using the find an installer tool in the sit...
By Batpred , 3 hours ago
-
RE: Say hello and introduce yourself
I hope so, @toodles. It's not often that we see a situa...
By Majordennisbloodnok , 5 hours ago
-
RE: Heat pump design review please: 5 kW Vaillant aroTHERM Plus heat pump
@jamespa many thanks, definitely i will give the pre...
By ragtime27 , 16 hours ago
-
RE: Heat pump installation quotations
@jamespa I noticed that in the Heat Geek design consult...
By Batpred , 17 hours ago
-
RE: Electricity price predictions
Good point, I do expect the bonus of putting my energy ...
By Batpred , 1 day ago
-
RE: Daikin ESPAltherma and Home Assistant installation
@bash, something we haven't touched on already relates ...
By Majordennisbloodnok , 1 day ago
-
RE: Help me keep the faith with my air source heat pump installation
@jamespa these:
By AdamK , 1 day ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
Vaillant arotherm plus 12kW. Installed March 2025. Ex...
By Harebell , 2 days ago
SPONSORS
