Quantcast Leak  Checking - TM-5-4120-375-14_182

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Leak  Checking - TM-5-4120-375-14_181
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TM-5-4120-375-14 Air Conditioner Horizontal Compact 18 000 BTU 208 Volt 3 Phase 50/60 Hertz NSN
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EVACUATING   THE   SYSTEM
TM5-4120-375-14 5-16.  Leak  Checking  (cont.). (1). ELECTRONIC LEAK DETECTOR. Turn the electronic unit on and slowly pass the probe around all points of the refrigeration system at which a leak could exist. Depending upon the type of detector used,   a leak will be indicated by an audible signal   light, or by meter deflections. (2) . SOAP SOLUTION. Brush soap solution on all possible points of leakage and watch for bubbles. Follow a definite sequence to avoid missing any joints that should be tested. Wipe the solution from all joints and mark any point at which a leak is  found. (3). Discharge the system after leak checking by connecting a hose to the suction service valve and cracking the valve open slightly to slowly discharge the gas. Rapid discharge will cause oil to be blown out of the compressor. If leaks were detected,   repair them and retest in accordance with paragraph 5-19 thru 5-24. If the system is leak tight, double  evacuate  and  charge  the  system  in  accordance  with paragraph  5-18. 5-14

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