Quote:
Originally Posted by mylesdw
The valve on this small tank is also the one you hear blow off when the system is fully charged?
|
Not entirely, there is an unloader valve in the compressor which is controlled by a pressure regulating valve that will have small-bore plastic tubing connecting it to the condensing tank and also to the compressor, so you might be hearing the compressor 'unloading' - though the drain valve will emit a short 'Pffft' as it expels the condensate. You can check which one you are hearing by squatting next to the condensing reservoir as the compressor reaches cut-out pressure.
The pressure regulating valve looks vaguely like this:-
http://thumbs3.ebaystatic.com/d/l225...VXCIHzEf0A.jpg
or this:-
http://ace.imageg.net/graphics/produ...8622enh-z7.jpg
(both of these are more recent versions, but there will be a 'dome' with a screw and nut (for adjustment) on the top).
This valve signals the unloader (exhaust) valve in the compressor cylinder head.