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Author Topic: Solar filling  (Read 1957 times)
chris wills
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« on: August 04, 2019, 12:16:22 PM »

I am about to refill my system with glycol pre mixed and ready to go.
The garden sprayer idea is nearly finished although I cannot seal the plastic pipe to the sprayer where the ribbed hose used to be.
Any suggestions?
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Iain
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« Reply #1 on: August 04, 2019, 02:00:05 PM »

Hi
I made an adaptor that screws into the filling loop. The thread in the other end allows the sprayer trigger to screw into it. I remove the lance from the trigger and the adaptor takes the male thread on the trigger unit.
Just found the 2 correct threads and silver soldered together so no threads to cut.

Iain


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« Last Edit: August 04, 2019, 02:02:09 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
chris wills
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« Reply #2 on: August 04, 2019, 03:33:25 PM »

Thanks Iain, I did this, does seem to be enough pressure there to fill the system, but I will give it a go with water first before using the glycol.
Is it best to switch off the pump or run it when filling?
Do you fill it on the return tap or on the flow?


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Iain
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« Reply #3 on: August 04, 2019, 07:04:37 PM »

Hi
I switch the pump off, I suppose in case it runs dry.
I have a bypass valve around my my non return valve.
So I just open the bypass, fill up to 1.5 bar. Then I release any air from the air vent in the loft and also by my pump.
I then represurise to 1 bar and run the pump, then vent a couple more times, close the bypass and switch the pump to auto.
I then check over the next week a couple of time, just release the last of the air and a final pressure top up from the mains.
I just put the correct amount of neat glycol in first then just use the mains to top the pressure up each time.
I have two vents one in the loft on the return and one on the discharge side of the pump.
Each vent is an upstand of 22 mm pipe with a manual vent on top. Any air will always collect in these upstands for easy release.
Iain
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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
chris wills
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« Reply #4 on: August 04, 2019, 07:32:13 PM »

Thanks. I thought to empty the system first. Plug in and let it rip.
I just canít see it having enough pressure to fill it up.
Will try later.
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Iain
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« Reply #5 on: September 06, 2019, 03:46:04 PM »

Hi
I just use the garden sprayer to put the correct amount of neat glycol in first. Needs minimum pressure. Then top up to pressure with the filling loop from the mains. My system has 4 lts of fluid. I just put in 1 lt of glycol in first so needs little pressure then top the rest up using the mains filling loop.
Never had an issue.

Iain
« Last Edit: October 12, 2019, 11:17:14 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
dimengineer
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« Reply #6 on: October 12, 2019, 09:08:27 PM »

I just use a garden hose, with a standard hoselok fitting - fills my system up to 2 bar (main pressure). Infinite supply! To get glycol in, I first fill the hose with neat solution, and let it rip. Crude, I know, but it works.
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