Renewable Heating Hub Heat Pump Forums

Search with Wattson
Forums
Renewable Heating
Air Source Heat Pum...
Ecodan new build in...
 
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!

Ecodan new build install - zoning question

 
Air Source Heat Pumps (ASHPs)
Last Post by darlomrh 8 months ago
3 Posts
2 Users
2 Reactions
977 Views
RSS
 darlomrh
(@darlomrh)
Active Member Member
Joined: 8 months ago
Posts: 6
Topic starter 15/02/2026 9:34 am   [#2825]

Hi apologies, if this is a duplicate post. We have newly purchased a new build that has a  Ecodan R32 ASHP.

FTC is in the cupboard with all the tanks and has 1 wireless controller downstairs and 1 wireless controller upstairs. 

The system has been configured as 2 "zones" and a wireless controller assigned to each. Am I correct in thinking that the way Ecodans work in this situation is that zone 1 sets the whole house temp and zone 2 allows you turn off the rads in that zone if you are too hot but not call for heat ie set a temperature higher than the zone 1 temp if you are too cold?

Thanks in advance


This topic was modified 8 months ago by Mars

   
👍
1
Quote
 ASHP-BOBBA
(@ashp-bobba)
Prominent Member Member Professional+
Joined: 2 years ago
Posts: 501
15/02/2026 11:41 pm  

@darlomrh, not quite, it is normal to set the unit up so that each wireless stat can energise the Ecodan and run any single zone, usually there would be an S-plan valve actuated, this will be in place to prevent migration when zone is not needed.

This is a classic setup but the designer needs to be sure each zone can reach the minimum flow and output of the ASHP lowest output to prevent unwanted cycling and allow minimum volume for defrost. The minimum water volume may be satisfied by a volumiser in this case but it will not prevent the short cycling if the circuit cannot dissipate the minimum output of the ASHP when a small amount of heating is required.

Hopefully they designed your ASHP somewhere near 20-30W/m2 so its not over sized and can cope with the zoning assuming your new build is built to the latest energy standards.

 

 

 


This post was modified 8 months ago 2 times by Mars

AAC Group Ltd covering the Kent Area for design, supply and installation of ASHP systems, service and maintenance, diagnostics and repairs.


   
👍
1
ReplyQuote
 darlomrh
(@darlomrh)
Active Member Member
Joined: 8 months ago
Posts: 6
Topic starter 16/02/2026 9:08 am  

Thanks for the reply. I hope this the case. I think it's a case of just finding the sweet spot for the house.

It's been a confusing start, when we first had the house, no matter how high we had the setpoint on the downstairs RC, no heat in the rads. Turned out that the RC downstairs was controlling the upstairs zone so it was 24c upstairs by the time we went to bed. We had the installers out to fix that.

Currently
RC1 is set for Zone 1 temp and Zone 1 Programme  
RC2 is set for Zone 2 temp and Zone 2 Programme  

The thing that is confusing me and it's probably a perception thing. RC1 is upstairs and RC2 is downstairs.

Z2Up

 

 

 

 

 

 

 

 

 

 

Picture from Melcloud home (I had no choice when I registered my equipment, Melcloud couldn't find the big white unit so I had to use MCHome ) I don't think this helps the perception.


This post was modified 8 months ago by darlomrh

   
ReplyQuote
Forum Jump:
  Previous Topic
Next Topic  
Share:

SPONSORS

Join Us!

Installer Finder

Degrees of Separation

Latest Posts

SPONSORS

Click to access the login or register cheese
Protected By
Shield Security PRO