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Author Topic: Solar Thermal Production @ Courtiestown  (Read 6987 times)
daveluck_uk
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« Reply #45 on: March 22, 2019, 11:43:38 AM »

Richard, are your panels lower than the water you are heating and is the store open vented and is your hot water non direct? If it is you could go non sealed.

Remove all the pressure tanks and feed in loop. I've been running mine like that for a while now and have made it through the winter with no freezing issues and I've not had any air problems at all.
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Iain
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« Reply #46 on: March 22, 2019, 11:49:56 AM »

Hi Richard
Just for a comparison.
I have 20 x 65 mm tubes. My pump is on the lowest speed with variable speed control.
It starts on 40% of the low speed and only on a couple of occasions have I seen the speed raise to 90%.
Probably a silly question and probably been mentioned before.
I had problems at the start with air etc. I finally narrowed it down to the Expansion vessel. I comes prcharged to 3 bar. I run my system at 1 bar so there was nowhere for the expansion to go apart from the pressure relief valve. As the system cooled the volume reduced an therefore drew a vacuum and any weak area would let air in.
I reset my EV pre charge to 0.8 bar for a 1 bar system pressure.
Not had any problems since.
Is your EV set to the correct pressure?

Iain
« Last Edit: March 22, 2019, 08:03:07 PM by Iain » Logged

1.98kWp PV (11 x Sharp 180 and SB 2.5)
20 x 65mm Thermal and 180ltr unvented
Powervault 4Kw - G200 Lithium-Ion (LiFePO4)
9000ltr rainwater storage   Plymouth
linesrg
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« Reply #47 on: March 22, 2019, 05:38:33 PM »

Iain,

My pump is also variable between 0 - 100% but the software allows the upper limit to be altered which is what I've done, so 100% = 4ltrs flow.

As I have posted previously I have allowed the installers to work on the system so far and thus I cannot answer your question. I am hoping that during the next leave I will get some time and the enthusiasm to start on the system and I'll be finding out what the current pre-charge pressure is.

Regards

Richard
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1.28kW on a Lorentz ETATRACK1000 + 1.44kW/ SB3000TL-21 (FIT), 1.28kW/ SB1700 (ROO/FIT). CTC GSi12 heat pump/Ecosol/Flowbox 8010e/Gledhill ASL0085 EHS/3off Navitron 4720AL Solar ET & Immersun T1060/T1070/T1090. 3.375kW/ SMA SB3600TL-21 and a Sunny Island 4.4M-12 c/w 15.2kWh battery and a Renault Zoe.
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« Reply #48 on: April 09, 2019, 05:36:11 PM »

Good Evening All,

Well we've had a nice sunny day here and I am genuinely pleased to report that the Solar ET continues to look like it is behaving itself.

I have attached a picture showing the system was 'pressurised' whilst operating this afternoon and I have witnessed it doing its panel cooling bit when the manifold gets to 120oC.

The EHS has had a lot of energy input via both the Immersun and the Solar ET and is currently sitting at 78oC which will get used later for domestic heating as the system demands.

Fingers crossed.

I do still intend lowering the expansion vessel.

Regards

Richard


* IMG_3005.jpg (117.81 KB, 1280x1087 - viewed 45 times.)
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1.28kW on a Lorentz ETATRACK1000 + 1.44kW/ SB3000TL-21 (FIT), 1.28kW/ SB1700 (ROO/FIT). CTC GSi12 heat pump/Ecosol/Flowbox 8010e/Gledhill ASL0085 EHS/3off Navitron 4720AL Solar ET & Immersun T1060/T1070/T1090. 3.375kW/ SMA SB3600TL-21 and a Sunny Island 4.4M-12 c/w 15.2kWh battery and a Renault Zoe.
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