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- 22 Nov 2011
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hi all...
I have an old gloworm 52 b boiler that I plan on changing next year but would like to get another winter out of her. I am running a wilo gold 50 pump on it.
I had a problem last winter with the boiler going totally out after it has been fired up for about 10 minutes. I put some anti sludge stuff in there ran it and drained it down then refilled. This got me through last winter but the problem has come back. I have drained and refilled now twice but the problem is still there.
This led me to think an air lock or pump issue. I have bled all radiators after filling up and cant get any more air out of system. I read a bit today and looked deeper into the pump.
I removed the screw at the rear to gain access to the impeller shaft and it is very free with some forwards backwards float. It comes on and changes speed accordingly so I am thinking the pump is ok....unless it is too free and the impeller is goosed.
How much resistance should there be on the pump when isolated and turned with a terminal screwdriver? I can easily finger and thumb it......
Im at a loss and am almost ready to bite the bullet and buy a replacement just to rule it out.
any help greatly appreciated...
also the pilot goes off too......would this be normal in an overheat lockout situation?
thanks
I have an old gloworm 52 b boiler that I plan on changing next year but would like to get another winter out of her. I am running a wilo gold 50 pump on it.
I had a problem last winter with the boiler going totally out after it has been fired up for about 10 minutes. I put some anti sludge stuff in there ran it and drained it down then refilled. This got me through last winter but the problem has come back. I have drained and refilled now twice but the problem is still there.
This led me to think an air lock or pump issue. I have bled all radiators after filling up and cant get any more air out of system. I read a bit today and looked deeper into the pump.
I removed the screw at the rear to gain access to the impeller shaft and it is very free with some forwards backwards float. It comes on and changes speed accordingly so I am thinking the pump is ok....unless it is too free and the impeller is goosed.
How much resistance should there be on the pump when isolated and turned with a terminal screwdriver? I can easily finger and thumb it......
Im at a loss and am almost ready to bite the bullet and buy a replacement just to rule it out.
any help greatly appreciated...
also the pilot goes off too......would this be normal in an overheat lockout situation?
thanks