navitron
 
Renewable Energy and Sustainability Forum
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Anyone wishing to register as a new member on the forum is strongly recommended to use a "proper" email address - following recent spam/hack attempts on the forum, all security is set to "high", and "disposable" email addresses like Gmail, Yahoo and Hotmail tend to be viewed with suspicion, and the application rejected if there is any doubt whatsoever
 
Recent Articles: Navitron Partners With Solax to Help Create A More Sustainable Future | Navitron Calls for Increased Carbon Footprint Reduction In Light of Earth Overshoot Day | A plea from The David School - Issue 18
   Home   Help Search Login Register  
Pages: 1 [2]   Go Down
  Print  
Author Topic: Rainwater harvesting pump burnt out.  (Read 4729 times)
Andy_WSM
Sr. Member
****
Offline Offline

Posts: 346


WWW
« Reply #15 on: March 22, 2014, 11:33:41 AM »

I like domestic water at 2.5 bar. Under 2 and you really notice lower flow and above 3 the pump will stay on for ages to reach that last little bit of pressure. I normally run a pump at 2.5-3 bar with an oversized pressure vessel (as the hysterisis is lower than normal to stop excessive hunting) and the PRV it down to 2-2.5bar so that showers don't change temp when someone opens a tap.

I too have fitted a Pressure Reducing Valve on the output of the pump today. I have a 12KW Instantaneous water heater and found the temperature of the shower would fluctuate as the pump starts & stops. The pressure vessel is charging to between 2 & 3 bar and the PRV is set at 1.5 bar, which is more than enough and the shower maintains a constant temperature now.
Logged

North Somerset. 3.92KWp SE facing PV system.

Pages: 1 [2]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines
SMFAds for Free Forums
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!