EVAPORATOR COIL, MALE COUPLING HALF AND EXPANSION VALVE - continued

TM9-4120-423-14&P

Equipment Conditions

Air conditioner removed from shelter (See

Return air screen and frame removed (See

Access cover removed (See WP0024)

Front evaporator cover removed (See

Radio frequency filter removed (See

Heater assembly removed (See WP0021)

Fan and motor assembly removed (See

Refrigerant R-22 system discharged (See

INSPECTION OF INSTALLED ITEMS

Check coil for accumulated dirt. Clean if an accumulation of dirt is evident.

Check fins for dents, bent edges, or any condition that would distort airflow. Straighten all

damaged fins with a plastic fin comb.

WARNING

Compressed air used for cleaning purposes will not exceed 30 PSI (2.1 kg/cm2). Do not

direct compressed air against the skin. Use goggles or full-face shield.

WARNING

Do not use steam to clean coil.

The coupling half fittings (hose disconnect fittings) used for joining the interconnecting

Refrigerant R-22 metal hoses, contain a poppet valve assembly to prevent Refrigerant R-22 loss

and to keep air from entering the line when hoses are disconnected. The following instructions

apply to both the suction (low pressure) and discharge (high pressure) couplings.

Check couplings for cracks, breaks, loose connections, and evidence of leakage. Replace if

damaged.

Leak test in accordance with WP0073.

0078 00-2