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TM 5-4120-270-15 CHAPTER 1 INTRODUCTION Section I.  GENERAL 1-1. Scope a. This     manual     is     published     for     use     of personnel to whom  Military Models hIAC4V60-360-3 and MAC6V60-360-2 air conditioners are issued. Chapters 1 through  3  provide  information  on  operation,  preventive maintenance  services,  and  organizational  maintenance of the equipment, accessories, components, and attachments.  Chapters  4  through  6  provide  instructions for  direct  and  general  support  and  depot  maintenance. Also   included   are   description   of   main   units   and   their relationship to other components. b. Numbers    in    parentheses    on    illustrations indicate   quantity.       Numbers    preceding    nomenclature callouts on illustrations indicate the preferred maintenance sequence. c. Report of errors, omissions, and recommendations  for  improving  this  publication  by  the individual user is encouraged.  Reports should be submitted      on      DA      Form      2028      (Recommended Changes to DA Publications) and forwarded direct to the Commanding  General,  U.    S.    Army  Mobility  Equipment Command,        ATTN:    AMSME-MPP,    4300    Goodfellow Boulevard, St. Louis, Mo.  63120. d. Report all equipment improvement recommendations as prescribed by TM 38-750. 1-2. Record and Report Forms a. DA    Form  2258    (Depreservation  Guide  of Engineer Equipment). b. For other record and report forms applicable to the operator and organizational maintenance, refer to TMI 38-750. Note.    Applicable  forms,  excluding  Standard  Form  46 (United  States   Government   Motor   Vehicles   Operator’s Identification  Card)  which  is  carried  by  the  operator,  will be kept in a canvas bag mounted on the equipment. Section II.  DESCRIPTION AND TABULATED DATA 1-3. Description a. General.      The   air   conditioner   (fig.      1-1 through  13)  is  used  primarily  in  van  type  enclosures  for providing  filtered,  conditioned,  or  heated  air  as  required to maintain service conditions necessary for the efficient operation of electronic equipment and for the comfort of operating personnel housed  within  the  specified  vans.  It is a  completely  self-contained,  air  cooled,  electric  motor driven    unit    designed    for    continuous    operation    with varying loads.  It is equipped with internal ducting to the low  side  of  the  evaporator  fans  so  that  ventilation  air from  the  Chemical,  Biological,  and  Radiological  (CBR) filter unit may be supplied by the evaporator fans. b. Condensing     Section.          The     condensing section  located  at  the  bottom  of  the  unit,  contains  the hermetically sealed compressor, condensing coil, receiver, condenser air intake opening, condense air    discharge    opening,    control    panel,    junction    box, condenser   fan,   fan   motor,   dehydrator,   system   access valves, solenoid valve, expansion valve, check valve and pressure release safety valve. c. Evaporator    Section.        The    evaporator section,   located   in   the   top   of   the   unit,   contains   an evaporator  coil,  evaporator  fans,  air  conditioning  filters, intake  and  discharge  grilles,  evaporator  coil  drain  pan, expansion valve, solenoid valve, back pressure 1igulating valve, electrical heaters, sight glass, accumulators  and  a  damper  to  regulate  the  amount  of outdoor air entering the air conditioner. 1-4. Identification and Tabulated Data a. Identification.    The  air  conditioner  has  14 major identification plates.  The information contained on the plates is listed below.  See figure 1-4 for location 1-1

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