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Page Title: 5-15. LEAK TESTING REFRIGERANT SYSTEM.
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ARMY TM 9-4120-381-14 NAVY EE-000-CA-MMA-010/7053-AC AIR FORCE TO 35E9-136-31 5-15. LEAK TESTING REFRIGERANT SYSTEM. This task covers:  Service INITIAL SETUP: Tools: Tool kit, service, refrigeration unit (Item 1, Appendix B) Gloves, chemical (Appendix C) Goggles, industrial (Appendix C) Personnel: 1 Materials: Nitrogen, technical (Item 14, Appendix E) Rags (Item 12, Appendix E) Refrigerant-22 (Item 11, Appendix E) Equipment Conditions: 1. Install service manifold (para 5-11 steps 1 thru 5). 2. Purge refrigerant system (para 5-13). SERVICE WARNING Death or serious injury may result if personnel fail to observe safety precautions. Use great care to avoid contact with liquid refrigerant or refrigerant gas being discharged under pressure.  Sudden and irreversible  tissue  damage  can  result  from  freezing.    Wear  thermal  protective  gloves  and  a  face protector   or   goggles   in   any   situation   where   skin-eye-contact   is   possible.   Prevent   contact   of refrigerant  gas  with  flame  or  heat  surfaces.    Heat  causes  the  refrigerant  to  break  down  and  form carbonyl chloride (phosgene), a highly poisonous and corrosive gas. CAUTION Nitrogen cylinders are pressurized containers.  The pressure in the cylinder can exceed 2000 psi.  A nitrogen pressure regulator should be used at all times when nitrogen is used for leak check or purge operations.    Do  not  allow  nitrogen  pressure  regulator  setting  to  exceed  200  psig  during  purging. Nitrogen is an inert gas.  However, it also presents danger as a suffocant and, therefore, must also be discharged in a ventilated location. 5-26

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