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table 2-1. preventive maitenance checks and services
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TM-5-4120-361-14 Air Conditioner Vertical Compact 18 000 BTU/HR 208 Volts 3 Phase 50/60 Hz (Model 18K 208 3 60) Manual
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figure 2-3. typical installation of air container to enclosure
TM 5-4120-361-14 Section  III. OPERATING UNDER USUAL CONDITIONS 2-5. General. a. The instructions in this section are published for the information and guidance of the personnel responsible for the operation of the air condi- tioner. b. The operator must know how to perform every operation of which the air conditioner is capable. This  sec- tion gives instructions on starting and stopping the air conditioner, and de- tailed operating instructions. Since nearly every condition presents a dif- ferent problem, the operator may have to vary the given procedure to fit the condition. b. Lifting. 2-6. Unloading   Equipment. The total weight of the air condi- tioner is 435 pounds (198 kg.). Use a hand truck or forklift of at least 500 pounds capacity to unload the unit. Keep unit upright during the unloading operation. 2-7. Unpacking   Equipment. Move the unit as near to the site of installation as possible. Remove crating hardware and metal straps being careful not to damage the unit with the tools used for uncrating. 2-8. Inspecting and Servicing Equip- ment. a. Inspection. Inspect the entire air  conditioner   for signs of damage, missing or loose hardware, and any de- fects that may have been incurred during shipment. Report all damage and de- fects to organizational maintenance. b. Servicing. Perform the daily preventive maintenance services listed in  paragraph  2-4. Be sure all hardware is  securely  in  place. 2-9. Installation. a. General. The air conditioner is shipped assembled and ready for opera- tion. It contains a full charge of re- frigerant and compressor oil. Install the unit on a firm, level surface to al- low proper condensate drainage. Place it so that the control panel and con- denser and evaporator louvers are acces- sible to the operator and to maintenance personnel. Be sure there are no obstructions in front of any air intake or discharge louvers or other openings that may cause insufficient flow of air in to or out of the air conditioner. If the unit is van mounted, report any such obstructions to organizational mainte- nance. Check for broken or de- formed lifting ring attachment and hard- ware before lifting air conditioner. Lift with crane or forklift truck. Use lifting harness with 4-leg spreader  bar. Each leg must be. capable of withstanding a concentrated load of more than 500 pounds. If spreader bar cannot be used, the angle be- tween the harness legs and the top of the air conditioner must be not less than 45- degrees. c. Mounting. Base mounting hole dimensions are shown on figure 2-2. The resilient mount parts shown in figure 2-3 are shipped with the air condition- er. For safe operation connect a No. 10 AWG (min.) ground wire between the air conditioner ground connection and an earth ground, as shown in figure 2-4. d. Connections. (1) Connect air ducts to the unit as applicable to the site of installa- tion. If the inlet grille is removed, a return air filter should be relocated in the return air duct at a maintainable location. Operation of unit without a return air filter will cause fouling of the evaporator fan and evaporator. (2) Connect a condensate drain line to carry condensate water away from site of installation only if the drop of con- densate is objectionable. 2-6

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