Search with Wattson
Buffer Tank Dixell ...
 
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!

Buffer Tank Dixell Setpoint vs Weather Compensation Flow Temp on Altherma 3M Heat Pump... Will It Ever Trigger?

3 Posts
2 Users
1 Reactions
234 Views
(@lbart68)
New Member Member
Joined: 2 months ago
Posts: 2
Topic starter   [#3000]

Hello, I am completely new to heat pumps having moved into a house with one I wasn't involved in the install etc so trying to understand it all.

I'm trying to understand around the buffer tank and the set point on the dixel controller. What should the set point be set to as I understand that it only triggers the circulation pump when it reaches that +2c but if the WD curve is currently 25C and the set point is 30c, it won't ever reach it I thought? Sorry if this is dumb question 


This topic was modified 2 months ago by Mars

   
Quote
JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 5146
 

Hi

Welcome to the forums and please be assured that no question is dumb. 

Just like boiler based systems, heat pump based ones differ from house to house.  If you can tell us more about your system, the key components and controls, I'm sure we can work it out.  If you have a system diagram then please post it.


This post was modified 2 months ago by JamesPa

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
👍
1
ReplyQuote
(@lbart68)
New Member Member
Joined: 2 months ago
Posts: 2
Topic starter  

Hi,

Thank you.

 

So its a Daikin Altherma 3M in a new build that has 2 zones with hive thermostats. I've attached a couple of photos of the controls/cylinder. No system diagram and nothing left for us beyond the manual.

I've got my head around the WD curve but its trying to understand how what I've established is a Dixell controller on the cylinder

PXL 20260515 145530485
PXL 20260515 145351173

works with it... From what I understand, the current buffer tank temperature is 26c and its set point is 30c. It needs to be +2c from the set point to trigger the circulation pump but in my simple brain, if my WD curve is set to 25c for current temps, then the pump won't ever activate but then obviously flow temps change but the set point doesn't so I don't know what to set it to or what I should do with it



   
ReplyQuote
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