TM 9-4120-402-14
5-15. LEAK TESTING THE REFRIGERANT SYSTEM.
This task covers: Test
INITIAL SETUP
Tools
Equipment Condition
Refrigeration Unit Service Tool Kit
Install service manifold (para 5-10).
Appendix B, item 1
Goggles
Appendix B, item 2
Gloves
Appendix B, item 2
Nitrogen Regulator
Appendix B, item 7
Materials/Parts
Nitrogen
Appendix E, item 8
Refrigerant R-22
Appendix E, item 4
WARNING
Never pressurize lines with oxygen, mixture with oil will cause an explosion.
The pressure in a nitrogen cylinder can exceed 2000 psi. A nitrogen pressure regulator should
be used at all times to avoid personal injury.
Nitrogen is an inert gas that can cause suffocation and must be discharged in a well ventilated
area.
NOTE
Either a refrigerant gas leak detector or a strong solution of liquid detergent in water can be used
to test for leaks.
If an electronic refrigerant gas leak detector is available, it should be used in accordance with the
procedures contained in TM 9-4940-435-14, "Leak Detector, Refrigerant Gas".
To perform leak testing by use of the electronic detector, it is necessary that the system be
pressurized with a proportion of refrigerant gas.
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