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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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