Forums

Search with Wattson
Forums
Renewable Heating
Air Source Heat Pum...
Heatmeiser smart co...
 
Notifications
Clear all

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!

Heatmeiser smart controls with ashp

 
Page 2 / 2
Air Source Heat Pumps (ASHPs)
Last Post by Derek M 2 years ago
21 Posts
3 Users
1 Reactions
4,996 Views
RSS
 EmmaJG
(@emmajg)
Active Member Member
Joined: 2 years ago
Posts: 10
Topic starter 07/11/2023 2:19 pm  

Yes, the unit shows the ASHP and zones come on when thermostat temps are raised - I’ve checked them all. Lights come on the unit, the valve on the appropriate zone lifts 2-3mm and the red in the tube indicator drops. (Only exception is the spare bedroom where all indicators work except the red in the tube which only partially moves.)



   
ReplyQuote
 Derek M
(@derek-m)
Illustrious Member Member
Joined: 5 years ago
Posts: 4425
07/11/2023 2:57 pm  

Posted by: @emmajg
↑

Yes, the unit shows the ASHP and zones come on when thermostat temps are raised - I’ve checked them all. Lights come on the unit, the valve on the appropriate zone lifts 2-3mm and the red in the tube indicator drops. (Only exception is the spare bedroom where all indicators work except the red in the tube which only partially moves.)

That's fine, the red indicator shows the water flow rate, which should have been balanced the the heat demand of each particular room.

With reference to your original post. Probably the most efficient way to operate your heat pump would be to have all the heatmiser thermostats set to 1C above the desired level, with the Vaillant controller using the WC curve to adjust the Leaving Water Temperature (LWT), to help maintain the desired Indoor Air Temperature (IAT) under varying Outside Air Temperatures (OAT). The flow rate through the UFH loops should then be adjusted to achieve the desired room temperatures.

If a particular room gets too warm then the relevant solenoid valve should close to bring the temperature back down.

When all the thermostats are set low, does the heat pump stop, though the water pump may run on for several minutes.

 



   
ReplyQuote
 EmmaJG
(@emmajg)
Active Member Member
Joined: 2 years ago
Posts: 10
Topic starter 07/11/2023 2:59 pm  

Helpful video! It’ set at 0.45



   
ReplyQuote



 Derek M
(@derek-m)
Illustrious Member Member
Joined: 5 years ago
Posts: 4425
07/11/2023 3:10 pm  

Posted by: @emmajg
↑

Helpful video! It’ set at 0.45

Okay, if your home is getting too warm then you could try selecting a lower curve.

If you make an adjustment remember that the system will take quite some time to stabilse, so don't expect an immediate drop in temperature, unless you open all the doors and windows. 😋 

 



   
ReplyQuote
 EmmaJG
(@emmajg)
Active Member Member
Joined: 2 years ago
Posts: 10
Topic starter 07/11/2023 3:16 pm  

@derek-m This has been enormously helpful. I have one last question. How does the desired temp set on the vaillant controller relate to those I set in the individual room thermostats? (Which one wins?)



   
ReplyQuote
 Drew Pa
(@drew-pa)
Estimable Member Member
Joined: 4 years ago
Posts: 73
07/11/2023 3:23 pm  

Please forgive me jumping in.  We have a Vaillant ASHP and have the  same room controllers as you, ours are wired though.    Who wins depends on the settings.  We tried both ways and have now got it set so the Vaillant controller is the only heat reference.  The neostat V2 no longer control the rooms. The valves are disconnected, and the stats just indicate the temp in each room.  This has done wonders for our COP.  

Drew



   
👍
1
ReplyQuote



 EmmaJG
(@emmajg)
Active Member Member
Joined: 2 years ago
Posts: 10
Topic starter 07/11/2023 3:30 pm  

@drew-pa Thanks - maybe one for us to try next.

Thanks all for your help today - you’ve been fabulous. What a great community!



   
ReplyQuote
 Derek M
(@derek-m)
Illustrious Member Member
Joined: 5 years ago
Posts: 4425
07/11/2023 3:45 pm  

Posted by: @emmajg
↑

@derek-m This has been enormously helpful. I have one last question. How does the desired temp set on the vaillant controller relate to those I set in the individual room thermostats? (Which one wins?)

The Vaillant controller actually controls the heat pump, the heatmiser thermostats just open the solenoid valves and start and stop the heat pump, assuming it has been connected correctly.

 



   
ReplyQuote
 Derek M
(@derek-m)
Illustrious Member Member
Joined: 5 years ago
Posts: 4425
07/11/2023 3:48 pm  

Posted by: @drew-pa
↑

Please forgive me jumping in.  We have a Vaillant ASHP and have the  same room controllers as you, ours are wired though.    Who wins depends on the settings.  We tried both ways and have now got it set so the Vaillant controller is the only heat reference.  The neostat V2 no longer control the rooms. The valves are disconnected, and the stats just indicate the temp in each room.  This has done wonders for our COP.  

Drew

By all means jump in Drew, particularly since you have a similar system and possibly the same problems.

 



   
ReplyQuote



Page 2 / 2
Forum Jump:
  Previous Topic
Next Topic  



Share:

Join Us!

Worth Watching

Latest Posts

Members Online

Click to access the login or register cheese
x Powerful Protection for WordPress, from Shield Security PRO
This Site Is Protected By
Shield Security PRO →