TM 9-4120-403-14
4-6. AIR CONDITIONER PREPARATION FOR INSTALLATION
No preparation is necessary if the air conditioner is to be installed by the typical exterior wall opening method and
operated as a self-contained unit. For alternate installation methods, some preparation is necessary.
4-7. INSTALLATION INSTRUCTIONS
All alterations to the shelter or facility into which the air conditioner is to be installed should be complete before
installation of air conditioner.
WARNING
DO NOT LIFT without holding unit in upright position. Otherwise, unit will fall over and could cause injury
to personnel.
a. Move air conditioner into position and aline mounting holes.
b. Secure unit with appropriate mounting hardware.
Base . 4375-14 UNC (4 holes)
c. Seal all openings around cutouts for air conditioner, air and water tight. Use gasket, caulking, or other suitable
material.
d. The air conditioner is provided with four drain holes in base. (See figure 2-4. ) Remove plugs from all drains
possible for most complete drainage of condensate water. If water from these drains will be objectionable or create a
hazard, external overboard drains can be connected. Use standard 1/2-14 NPT male pipe fittings to connect base drains.
Any type of hose or tubing may be used as a drain line. The drain line should lead to an appropriate facility drain, storm
sewer, dry sump, or an acceptable outside area. Be sure the entire length of the drain line is at the same height, or lower
than the base to ensure gravity drainage.
e. Install a 10 AWG minimum ground wire between frae ground (E4) on air conditioner cabinet and an adequate
earth ground.
Section III UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
4-8.
INTRODUCTION, INSPECTION, AND SERVICE
a. Systematic, periodic, Preventive Maintenance Checks and Services (PMCS) are essential to ensure that the air
conditioner is ready for operation at all times. The purpose of a preventive maintenance program is to discover and
correct defects and deficiencies before they can cause serious damage or complete failure of the equipment. Any
effective preventive maintenance program must begin with the indoctrination of operators to report all unusual conditions
noted during daily checks or actual operation to unit maintenance. All defects and deficiencies discovered during
maintenance inspections must be recorded, together with corrective action taken, on DA Form 2404 (Equipment
Inspection and Maintenance Worksheet).
4-7