Extrol tank I have some ? about them.

Joe.G

If i check the pressure in the extrol tank when the system still has pressure what reading would I get> Say the tank has 12 psi and the boiler is at 26 psi should I get 38 psi? The reason am asking is I was wondering if there was a way to double check my boilers pressure gauge with going though a lot of trouble.

Also is it normal for a extrol tank to lose a little pressure over a years time or should they not lose any?

and how do you size one of these for your system?

how do you know if the tank is to big or to small? the one I have is about the size of your standard barbecue propane tank.

thanks a lot.

Big Ed

Expansion tank

You need to drop the water pressure to zero before you check the charge in the tank. And leave the drain valve open to charge it up again to its proper pressure , which is the set pressure of the system .

To check the boiler gauge use a test gauge, posted below. Also a chart to size a expansion tank..

Yes they can loose up to 2# a year . Install them down and wet to help prevent rapad air loss through osmoses..

You have enough expansion on the system if the boiler pressure does not rise with temperature rise....

Hope this helps

Joe.G

I am sorry but I can not figure out that cart, I have a model 30 extrol tank, my aotu fill is set to 12 and my pressure releif vavle is set to 30 or 35. Also where do I hook that gauge up? would I hook it up to where my heating system would be drained from (the gate vale in the front of my boiler? thanks a lot

Unknown

Joe

My advice would be to take the pressure off of the system and then check your tank pressure. It should be equal to whatever static fill pressure you desire to maintain. That would normally be 12 psi, thus the 12-15 psi pre-charge from the tank manufacturer. I might also state that this should be done with something better or more accurate than a standard tire gauge for better results and should also be done when the system temperature is cool for safety reasons. The more times you attempt to get a reading, the more charge you will lose. Hope this helps.

Glenn Stanton

Manager of Training

Burnham Hydronics