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Author Topic: Buffer tank fill levels?  (Read 363 times)
chris wills
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« on: November 09, 2019, 11:40:41 AM »

Just wandering how full should my buffer tank be for my ASHP?
As I have had some maintenance done over the past few weeks and lost some of it probably, should it be full to the top or something else?


It's a 200 litre cylinder, should it be full to the top?
« Last Edit: November 09, 2019, 02:02:54 PM by chris wills » Logged
benseb
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« Reply #1 on: November 09, 2019, 04:36:43 PM »

Should be completely full with any air bled from the top.
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chris wills
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« Reply #2 on: November 09, 2019, 05:14:12 PM »

That makes sense, I'll top it up
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Nickel2
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Method mixed with Madness


« Reply #3 on: November 10, 2019, 09:15:43 AM »

Remembering to take expansion into account...
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1.140kW mono south-facing at 49*
EpEver 4210A at 24v
24V 400 Ah battery. (4x200Ah FLA)
EpEver STI1000-24-230 pure sine inverter
Of course it'll work. (It hasn't caught fire yet).
chris wills
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« Reply #4 on: November 10, 2019, 10:31:46 AM »

I have an expansion vessel in line.
Any advice?
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rogeriko
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« Reply #5 on: November 10, 2019, 09:09:47 PM »

Thats a pressurised system buffer. It should have a good 1.5 bar pressure in it. I suggest you call a plumber who can work on pressurised systems and get him to check it out before something expensive gets damaged.
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chris wills
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« Reply #6 on: November 11, 2019, 12:42:05 PM »

should I top up when all the rads are open so the water is flowing into them, to see how much the tank needs to be topped up by?
I don't think there is enough coolant in the system.
The ASHP comes on every 15-20 mins, is that normal?
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JohnS
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« Reply #7 on: November 11, 2019, 08:27:57 PM »

Top up the pressure
Bleed the radiators
Top up again
Repeat as necessary

Best to do it with the system off.  Not sure if that is to prevent the risk of scalding water squirting out or of sucking air in if the pump is installed on the return side and thus could be more suction than push.  But generally recommended.
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