Forums

Forums
Renewable Heating
Air Source Heat Pum...
Circulatory pumps a...
 
Notifications
Clear all

Circulatory pumps and weather compensation

 
Air Source Heat Pumps (ASHPs)
Last Post by bretix 6 months ago
5 Posts
4 Users
2 Reactions
547 Views
RSS
 bretix
(@bretix)
Estimable Member Member
Joined: 2 years ago
Posts: 79
Topic starter 14/10/2024 10:52 am  

So just checked the documents re added circulatory pumps and it seems these can be adjusted to accommodate flows etc.

Just wondering if anyone has experience of the settings with these and if any adjustments should be made in regard to weather compensation flow rates etc or does it adjust automatically?

20241014 104800

 

2 10kw Grant Aerona3
Heat loss calc 16.5 kw @ -2.8 degrees
4.32 PV


   
Quote
 Mike H
(@mike-h)
Reputable Member Member
Joined: 3 years ago
Posts: 197
14/10/2024 1:47 pm  

I have this pump and it has 3 settings which approximate to 6, 7 or 8 metres of head assuming I have correctly understood the pump curves on the Grundfos website. 


   
👍
1
ReplyQuote
bontwoody
 bontwoody
(@bontwoody)
Noble Member Contributor
Joined: 3 years ago
Posts: 798
15/10/2024 6:37 pm  

@bretiix Some heatpumps (eg Samsung) can control the pump speed automatically via something called pulse width modulation. Im not sure if any other makes have this capability.

House-2 bed partial stone bungalow, 5kW Samsung Gen 6 ASHP (Self install)
6.9 kWp of PV
5kWh DC coupled battery
Blog: https://thegreeningofrosecottage.weebly.com/
Heatpump Stats: http://heatpumpmonitor.org/system/view?id=60


   
👍
1
ReplyQuote
 Johnmo
(@johnmo)
Prominent Member Member
Joined: 2 years ago
Posts: 424
17/10/2024 5:11 pm  

Posted by: @bretix
↑

weather compensation flow rates etc or does it adjust automatically?

If the pump is PWM controlled, flow rates will be adjusted automatically by the heat pump, most pumps aren't though. So you need to set the flow rates manually. The flow setting should really change between a system bouncing of multiple thermostats and one on WC.

But on WC you will have a couple of pump operating strategies with the ASHP control. Continuous or sniffer mode, these come into play when the compressor is ideal, but the is a demand for heat. What you choose is variable dependant on heating system.

Maxa i32V5 6kW ASHP (heat and cooling)
6.5kW PV
13.5kW GivEnergy AIO Battery.


   
ReplyQuote
 bretix
(@bretix)
Estimable Member Member
Joined: 2 years ago
Posts: 79
Topic starter 18/10/2024 9:51 am  

Thanks for answering I'm assuming the heat pump does it automatically although there is also a setting on the additional pump to adjust flows on demand - but as the HP is on all the time I'm assuming it falls in line with the flows on WC.

2 10kw Grant Aerona3
Heat loss calc 16.5 kw @ -2.8 degrees
4.32 PV


   
ReplyQuote
Forum Jump:
  Previous Topic
Next Topic  
Share:

Join Us!

Trusted Installers

Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.

✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available

👉 Find your installer now!

Latest Posts

x Powerful Protection for WordPress, from Shield Security
This Site Is Protected By
Shield Security →