solar pre heat for on demand heaters

Reply

  #1  
Old 03-16-14, 07:07 PM
D
Member
Thread Starter
Join Date: Nov 2008
Location: West
Posts: 261
Received 0 Votes on 0 Posts
solar pre heat for on demand heaters

some people say you cant have a solar pre heat on an on demand water tank because it
makes the heater screw up when it heats the water too fast. What do you think of that??
Some say you can put a 3 way bypass valve with a controller and just bypass the heater when you have enough solar hot water.
What is the best way to do a pre heat???
 
Sponsored Links
  #2  
Old 03-16-14, 08:56 PM
P
Temporarily Suspended
Join Date: Jul 2008
Location: NY
Posts: 10,986
Received 0 Votes on 0 Posts
I would contact the manufacturer of the water tank.
 
  #3  
Old 09-20-14, 05:27 PM
E
Member
Join Date: Sep 2014
Posts: 7
Received 0 Votes on 0 Posts
I use a Titan Scr2 N-120 tankless heater and it samples input and output temperatures 21 times per second. I used to have a solar heater pre heating my water before it went through the Titan. It worked great until my solar heater hoses started to decay. So now i just use the Titan to heat my water. The solar system worked great to preheat the water though...
 
  #4  
Old 09-20-14, 07:06 PM
D
Member
Join Date: Aug 2009
Location: USA
Posts: 4,947
Received 0 Votes on 0 Posts
Your concerns are correct. My brother has a tankless water heater and uses waste heat from his ground source heat pump to preheat the water. He uses a tempering valve to make sure the inlet water on the tankless is not too high.
 
Reply
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: