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CHARGING  THE  SYSTEM  (cont.). - TM-5-4120-375-14_187
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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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pressure testing
TM5-4120-375-14 5-18. CHARGING THE SYSTEM. (cont.) With   power   connected   to   the   air   conditioner,   turn   the   rotary   selector switch   to   COOL   and   the   temperature   control   thermostat   to   the   maximum COOLER  position. Let   the   air   conditioner   operate   for   15    m i n u t e s in   this   mode,   then   observe   the   sight-glass   liquid   indicator   while   the a i r    c o n d i t i o n e r    i s    r u n n i n g. If   bubbles   or   milkiness   appears,   top   off the   refrigerant   charge   as   follows: 5-20 ( 1 ) . With   the   air   conditioner   compressor   operating,   open   the   suction service   valve   and   the   cylinder   shutoff   valve   to   charge refrigerant   gas   into   the   system. Continue   to   observe   the s i g h t - g l a s s     l i q u i d     i n d i c a t o r. ( 2 ). When   the   liquid   in   the   sight-glass   liquid   indicator   runs   clear and   free   of   bubbles,   add   additional   6-8     ounces   (168-264   g)   of refrigerant.   Close   the   suction   service   valve   and   the   cylinder shutoff    valve. (3). Disconnect   the   manifold   assembly   and   the   refrigerant   cylinder   and pressure-test   the   air   conditioner   in   accordance   with   paragraphs 5-19   thru   5-24.

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