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Page Title: REFRIGERATION SYSTEM SERVICE - EVACUATION
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TM  10-4130-239-14 5-6. REFRIGERATION SYSTEM SERVICE - LEAK-TEST (CONT) 4. When the test area is free of residual refrigerant, warm up the electronic  leak  detector. Then calibrate it according to the instruction manual. This instrument is extremely sensitive, and is used to detect SMALL leaks. Exposing the probe to heavy refrigerant concentrations will cause the sensing element to “Hang-up”, requiring rejuvenation by operating for a time in an atmosphere known to be free of refrigerant. The life of the catalytic element will be significantly  shortened. 5. Move the probe slowly over possible leak points. 6. If the leak detector identifies refrigerant in the area before a specific point of sensing can be reached, either the ventilating time was too short or there is still a significant leak. Recheck area with liquid bubble detector, and/or ventilate area more thoroughly. 5-7. REFRIGERATION SYSTEM SERVICE - EVACUATION. This task covers: Evacuation Equipment Condition Para Condition Description Tools 2-8 Engine  stopped. 4-15 Housing  removed. 5-3 Service manifold Tool Kit, Service Refrigeration,  item 5, Appendix B Vacuum Pump, item 7, gauges Appendix B attached and system discharged. Materials/Parts: 5-24 New filter-dryer installed Refrigerant, item 24, Appendix E 5-13

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