Jump to content
Tersius

EVT System Dumping Water Between Temperature Range

Recommended Posts

I've got a 32 tube system heating water in a 200l geyser. I would like to connect some sort of relay-valve and monitor the temperature and then open the valve if say the temperature goes above 75 and close it if reaches 65 degrees. At the moment I'm just covering 12 of the tubes in summer but then on cloudy days the performance is not so great. 

What would be the most reliable way of achieving this? I've got a geyserwise so would be awesome if one could plug into the sensor for that.

I'll dump the extra hot water into the swimming pool as I have to top it up with water anyway. 

Share this post


Link to post
Share on other sites
49 minutes ago, Tersius said:

I've got a 32 tube system heating water in a 200l geyser. I would like to connect some sort of relay-valve and monitor the temperature and then open the valve if say the temperature goes above 75 and close it if reaches 65 degrees. At the moment I'm just covering 12 of the tubes in summer but then on cloudy days the performance is not so great. 

What would be the most reliable way of achieving this? I've got a geyserwise so would be awesome if one could plug into the sensor for that.

I'll dump the extra hot water into the swimming pool as I have to top it up with water anyway. 

Same here, my geyser at the moment is 76 degrees and rising and I only have 20 tubes on a 200L

Share this post


Link to post
Share on other sites
5 hours ago, plonkster said:

Yeah, I was sitting here thinking how privileged are you that you can dump water into your swimming pool... :-)

some would be lost to steam as well. Unless you connect it to a pipe running directly into the water?

Share this post


Link to post
Share on other sites

If you removed a few tubes instead of covering up 12 out of the system and plugged them back in if needed in winter. I cut a heater manifold up to add an additional 5 tubes to my system, 12 would have been too much. Most days I get 65°C plus on a 200l  geyser.

Share this post


Link to post
Share on other sites
26 minutes ago, seant said:

I cut a heater manifold up to add an additional 5 tubes to my system, 12 would have been too much. Most days I get 65°C plus on a 200l  geyser.

Please explain more, what heater manifold did you use?

 

Share this post


Link to post
Share on other sites

On a split system , if you unscrew the outer aluminum cover of the manifold there is some insulation and then a copper pipe with pockets that the centre core of the vacuum tube plugs into. Figure out how many tubes you want and then be brave and cut the copper pipe, and the outer cover to match maybe a fraction longer. Cut a few slits into the end of the copper tube and squeeze them together to reduce it to about 22mm and braze about a 10cm lenght of 22mm copper pipe onto the end. And reassemble

Share this post


Link to post
Share on other sites

The idea is to try and minimize human intervention, covering up or removing tubes are an ineffective way of reducing the heat and backfires on cloudy days. 

On 2018/10/16 at 9:52 AM, Chris Louw said:

Screenshot_2018-10-16-09-31-15.thumb.png.051a5684794410bfc2443a5ca0a66ebb.pngTersuis . The Geyser Wise Max do have a dumpvalve that is avialable .

That looks promising, I have the TSE version installed. Will call them and ask if that model can do the same thing.

Share this post


Link to post
Share on other sites
On 2018/10/16 at 8:09 AM, plonkster said:

Yeah, I was sitting here thinking how privileged are you that you can dump water into your swimming pool... 🙂

Hehe we lose quite a bit of water with evaporation so have to keep the damn thing topped up all the time. 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


Topics

Contact Us - Power Forum South Africa

×
×
  • Create New...