FRESH AIR DAMPER ASSEMBLY MAINTENANCE

TM 9-4120-430-14

0025 00

UNIT MAINTENANCE

AIR CONDITIONER, COMPACT, HORIZONTAL

FRESH AIR DAMPER ASSEMBLY MAINTENANCE

REMOVAL, DISASSEMBLY, INSPECTION, CLEANING, REPAIR,

ASSEMBLY, INSTALLATION, AND TEST

INITIAL SETUP:

Tools and Special Tools

Tool Kit, General Mechanics (Item 1, Table 2, WP 0067 00)

Materials/Parts

Cloth, Lint Free (Item 8, WP 0069 00)

Dry Cleaning Solvent (Item 16, WP 0069 00)

Personnel Required

One

Equipment Condition

Evaporator air intake louver removed (WP 0020 00)

WARNING

Ensure power source is disconnected.

REMOVAL

Fresh Air Ventilation Damper

1. Release ventilation damper chain (8) to close damper door (10). See figure 1.

2. Remove locknut (1) and screw (2) to release clamp (23) from side of unit housing.

3. Remove locknut (3) from screw (4) to release spring (13) from ventilation closeout at rear of unit housing.

4. Remove two screws (5) to release damper from side of unit housing.

5. Remove the ventilation damper from unit housing.

DISASSEMBLY

Remove screw (6) and nut (7) to release chain (8) from L-bracket (9) on damper door (10).

Remove screw (11) and nut (12) to release spring (13) from L-bracket (14) on damper door (10).

Remove screw (15) that secures L-bracket (9) to damper door (10).

Remove screw (16) and locknut (17) that secures L-bracket (14) to damper door (10).

Remove cotter pins (18) and shaft (19) that secure the damper door (10) to the hinge (20).

INSPECTION

1. Inspect ventilation damper parts for bending and warping.

2. Inspect insulation (21) for damage.

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