TM9-4120-388-14
4-11. INSTALLATION INSTRUCTIONS - Continued
(8) If fan blades turn away from grille, unit power cable is not connected properly. Exchange wires connected
to pins A and Bat power source connection and repeat steps (6) and (7) above.
(9) Check unit operation in accordance with para 2-6 and 2-7.
i.
information.
a Determine length.
b. Fabricate input rower cable in accordance with Figure 4-18. Cable must be shielded with QQ-B-575. tubular
wire braid 0.50 (12.7 mm) ID or equal and grounded to each connection end.
Section Ill. LUBRICATION
4-13. GENERAL. The
refrigerant compressor and its drive motor are hermetically sealed in a
canister. The
compressor
crankcase has a lifetime supply of oil and the drive motor has permanently lubricated, sealed bearings. No lubrication of
these items is required.
4-14. MECHANICAL LUBRICATION. The only mechanical items which may require Iubrication are the louvers in the condi-
tioned air intake and discharge grilles and the devices which operate the fresh air damper door. These points should be
checked and lubricated, as necessary, during preventive maintenance service. A few drops of Iight oil should be applied to pivot
points, bearing surfaces, hinges, and Iinkages to prevent or eliminate stiffness or binding. Be sure to wipe off all excess oil with
a cloth or paper towel. These items are in areas of high volume airflow and excess oil will tend to attract and accumulate dust
particles from the passing air. Graphite may be used as an alternate Iubricant during extreme cold weather operation.