TM 9-4120-360-14
CHAPTER 4
UNIT MAINTENANCE INSTRUCTIONS
Section I. REPAIR PARTS, SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT
4.1. General
Repair parts are listed and illustrated in TM 9-4120-360-24P. No special tools are required for maintenance of the
equipment. Test, maintenance and diagnostic equipment (TMDE) and support equipment include standard pressure and
vacuum gages, vacuum pump and charging manifolds found as standard equipment in any refrigeration shop.
Section II. SERVICE UPON RECEIPT OF EQUIPMENT
4.2. Unpacking
The air conditioner is bolted to the wood shipping pallet, which must be removed when the unit is to be installed in a
permanent location. Proceed as follows:
a. Cut the steel strapping. and carefully remove the wooden crating and plastic wrapping from the unit.
b. With the help of at least one assistant, lay the air conditioner on either side, supported by cushioned support
blocks such as two 2-foot lengths of 4 x 4 lumber.
c. Remove four 7/16-14 bolts securing the shipping pallet to the air conditioner's base plate. These bolts shouId
be retained if needed for permanent mounting of the unit. (See figure 1-1.)
d. Return the unit to the upright position, ready for installation.
4.3.
Checking Unpacked Equipment
Check the air conditioner in accordance with the following instructions:
a. Inspect the equipment for damage incurred during shipment. If the equipment has been damaged, report the
damage on DD Form 6. Packaging Improvement Report.
b. Check the equipment against the packing slip to see if the shipment incomplete. Report all discrepancies in
accordance with the instructions in DA PAM 738-750.
c. Check to see whether the equipment has been modified.
d. Perform all weekly and monthly preventive maintenance checks and services, as indicated in Table 2-1.
4.4.
Installation Instructions.
Observe the following requirements arid recommendations when installing the air conditioner.
a. The unit should be installed on a level supporting surface to permit uniform condensate drainage. If a level
surface is not obtainable, the unit maybe mounted on an angle not greater than 5 degrees from the horizontal. If this type
of mounting is unavoidable, be sure to connect the condensate drain to the drain opening in the lowest side of the base
plate. Drain plugs are located in the middle of each side of the baseplate. Standard 1/2-14 NPT fittings can be installed in
place of one or more of these plugs to conduct condensate drainage to a drain, storm sewer or dry sump, or a standard
garden hose may be used.
b. Rough-in Dimensions. An opening 18-1/2 1/2 inches (47 1 cm) wide, and 49 1/2 inches (124.5 1 cm)
high is required for installation of the air conditioner. A removable filler plate should be installed above the unit to permit
ready removal of the top panel for servicing. Space between the air conditioner and the wall may be filled with flexible
plastic foam and sealed with pressure-sensitive tape.
