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WATER LEAKS FROM FOAMED-IN SECTION OF SKID
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TM-10-4130-239-14 Small Mobile Water Chiller (
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Refrigeration System Repair.
Section II. GENERAL MAINTENANCE 5-2.  GENERAL. TM  10-4130-239-14 PROCEDURES a. Scope. This section contains Direct Support Maintenance instructions authorized by the Maintenance Allocation Chart (MAC), Appendix B, and by the Source, Maintenance,   and Recoverability (SMR) coded items to support the water chiller. b. Description. 1 2 3 4 5 6 7 WARNING When the refrigeration system must be opened for any reason, carefully discharge the refrigerant first. Avoid contact with liquid refrigerant. Severe freezing of body tissues can take place with  extreme  rapidity. Avoid excessive inhalation of refrigerant gas, and ventilate the area in which it is released. Refrigerant gas in contact with flame or hot surfaces is converted to phosgene. Phosgene is a highly toxic gas with an odor similar to newly mown grass or hay. The refrigerant system is illustrated by the refrigerant flow diagram. It is a mechanical, vapor-cycle circuit made up of evaporator,   thermal expansion valve, compressor, condenser, and the necessary valves and cutout devices for automatic control  during  operation. The thermal expansion valve releases high-pressure liquid refrigerant into the evaporator at reduced pressure. The liquid refrigerant begins to vaporize by absorbing heat from the water passing through the tubing of the evaporator. The heated vapor is pulled from the evaporator section by the compressor, and forced into the condenser section under high Pressure. There it is cooled and condensed back into a liquid. The heat released during condensation condensing  airstream. The liquid refrigerant flows from the sight glass into the filter-drier and expansion valve to repeat the cycle. is carried off by the condenser through a then to the thermal If the temperature control switch (low temperature thermal switch) becomes satisfied, the switch will open, grounding the ignition system,   and stopping the gasoline engine. 5-3

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