Section III OPERATION UNDER USUAL CONDITIONS

TM 5-4120-393-14

2-6. Assembly and Preparation for Use . Organizational Maintenance personnel should be employed for original

unpacking, installation, and preparation for use. See paragraphs 4-2 through 4-12.

2-7. Initial Adjustments and Checks.

a. Inspect all covers, panels, grilles, and screens for loose mounting, obstructions, or shipping damage. Report any

deficiencies to organizational maintenance.

b. Perform the operator preventive maintenance checks and services listed in table 2-1.

2-8. Operating Procedure.

a. Before Operation.

(1) Check to see that the power cable has been connected to a source of 208 volt, 3 phase, 50/60 hertz power

and to the input power connector on the unit.

NOTE

When possible, power should be connected to the unit at least 30 minutes prior to

operating in the COOL mode. The compressor is equipped with a warm up heater

and thermostat that will not allow the compressor to operate prior to complete

warm up.

The unit will operate immediately (fans only) in the COOL mode. The refrigeration

system (compressor) will operate only when warm up is complete (less than 30

minutes). If additional cooling is required the fresh air damper can be opened.

When compressor reaches a safe operating temperature it will start automatically.

The fresh air damper and TEMPerature control thermostat can then be adjusted to

suit.

The compressor is also equipped with a heater that will keep it warm so long as

unit remains connected to the power source.

2-7