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Posted by Harold hydronicnetwork.net on March 12, 2004 at 12:38:39:
In Reply to: HB smith boiler, tigerloop question posted by Bob on March 12, 2004 at 08:23:08:
what level should the oil be at in the tigerloop?
http://www.oventrop.de/en/products/hbtd/08_2122900.pdf
The Tigerloop is a float-type air eliminator, so the air level in the case is regulated by the float. If air is introduced to the clear case, the floats will lower and the air will exit the top port.
As you just had the unit serviced, there may be residual air for some days. If it continues whining, there may be an air leak in the lines, usually at a flare connection or filter gasket. Air passing through the return pressure regulator of the Tigerloop can make the noise. Another cause could be the pump; although if it did not make the whine before, it should not be the cause now.