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TM 5-4120-377-14
(2) An unobstructed flow of air from outside the conditioned area to the inlet and outlet of the condenser.
(3) An unobstructed flow of air from inside the conditioned area to the conditioned air intake and
discharge.
(4) An unobstructed flow of air from outside the conditioned area to the fresh air damper intake and/or
CBR filter intake, if installed.
(5) Access to the front and back of the cabinet for routine operation and servicing and for necessary
maintenance actions.
(6) Access to the top of the cabinet for removal of the top panel and sufficient headroom to allow
maintenance actions and internal component removal and installation through the top panel opening.
(7) A source of 208 volt, 3 phase, 400 hertz input power rated at 24.4 amps. The power source outlet
should be located as near as possible to the installed location of the air conditioner. The power source wiring
must include a disconnect switch. However, provisions should be made to insure that power is not
disconnected during normal operation and that the disconnect is not used to turn off the air conditioner for
normal shut-down.
(8) An earth ground capable of handling 24.4 amps.
(9) Check that no source of dangerous or objectionable fumes are located near the fresh air intake.
(10) If possible make use of terrain features such as trees and buildings to provide a shaded location. This
will minimize the cooling load on the air conditioner.
(11) If possible avoid locations where the condenser and fresh air intakes will be laden with dust, dirt,
soot, smoke, or other debris.
b. Through the wall installation. Prepare an opening in the wall large enough to slide the air conditioner
through. (See fig. 4-2, sheets 1, 2, 3, and 4.) Consideration should be given to service of internal components.
All openings around air conditioner must be sealed air tight.
c. Inside installation. Manufacture an arrangement of ducts for the condenser intake and discharge air
openings, and the fresh air damper intake and/or CBR filter intake, if installed. Ducts may be made for
attachment to the air conditioner cabinet using the mounting holes for the condenser inlet and outlet guards,
and the fresh air screen and/or the air intake on the CBR filter or some other arrangement may be made.
Prepare appropriate openings in an exterior wall for the ducts. Ducts may be designed to use the condenser
inlet and outlet guards, and the fresh air screen supplied with the air conditioner and relocated and installed
on the new duct work. Adequate replacements or some other arrangement of these items may be provided.
Easy access to fresh or return air filters must be provided. Filters may be left in position in
unit or relocated in duct work. Some installations (filters relocated in duct work) may
require different size filters.
d. Outside installation. Manufacture an arrangement of ducts for the conditioned air intake and discharge
air. Ducts may be made for attachment to the air conditioner cabinet using the mounting holes for the
conditioned air intake and discharge grilles or some other arrangement may be made. Ducts may also be made
for installation of the conditioned air intake and discharge grilles on the inside ends or replacements for these
items may be used. Prepare appropriate openings in the appropriate wall for the ducts.
4-9
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