air tank in water lines

air tank in water lines

PostBy: BigFoot On: Mon Apr 01, 2013 7:38 am

Had water coming out of pop off valve ,added air to the tank in line and water leak stoped ,what should the PSI in the tank be ? i just added about 5lbs ,(10 sec with air hose,no gauge ) :?:
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BigFoot
 
Stove/Furnace Make: Axeman Anderson
Stove/Furnace Model: AA130

Re: air tank in water lines

PostBy: steamup On: Mon Apr 01, 2013 11:19 am

Look up the installation instructions for your tank. Tank should be precharged to the same setting as your fill prv valve setting. This must be set before the tank is pressurized on the system.

The tank size is governed by the fill pressure setting, relief valve setting, system volume and system temperature rise. Too small a tank will not permit sufficient expansion and may cause the relief valve to open.

Adding air to a tank hooked to the system that is pressurized and warm is only a temporary fix.
steamup
 
Stoker Coal Boiler: Axeman-Anderson AA-130, Keystoker K-6
Hand Fed Coal Boiler: HS Tarm 502 Wood/Coal/Oil
Coal Size/Type: pea, buck, rice

Re: air tank in water lines

PostBy: BigFoot On: Sun Apr 07, 2013 7:36 am

thanks i changed the pop off valve, looks like thats the fix
BigFoot
 
Stove/Furnace Make: Axeman Anderson
Stove/Furnace Model: AA130

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Re: air tank in water lines

PostBy: Rob R. On: Sun Apr 07, 2013 9:00 am

12 psi is the normal pressure setting for the fill valve an diaphragm tank unless you have a home with more than two stories.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: air tank in water lines

PostBy: coaledsweat On: Sun Apr 07, 2013 7:06 pm

To charge the tank, first bring the system to zero pounds with the feed valve closed. Once the expansion tank is charged, re pressurize the system.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: air tank in water lines

PostBy: BigFoot On: Sat Apr 13, 2013 10:30 am

Thanks for your help with this! :D
BigFoot
 
Stove/Furnace Make: Axeman Anderson
Stove/Furnace Model: AA130

Re: air tank in water lines

PostBy: AA130FIREMAN On: Sat Apr 13, 2013 1:42 pm

I have 2 expansion tanks with shut off valves at each tank. The valves are the type that have a bleeder to relieve the pressure before checking /adding air to the bladder. I just make shure I open the valve when done and use a zip tie to keep it open (just so kids don't tamper with it). Remember pressure is higher at the lowest point on a water column. With 12 lbs of pressure at the bottom, if you were to measure around 24 feet up on the column, you would have 0 lbs, measure up 12 feet and you have 6 lbs of pressure.
AA130FIREMAN
 
Stove/Furnace Make: axeman anderson
Stove/Furnace Model: 130 anthratube

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