Repair Heater, Duct Type, Stationary (Ducts #4 through #7), (Ducts #9 through #12) and (Ducts #12A, #14, #16, and #17)

TM 55-1905-223-24-17

2-20. Repair Heater, Duct Type, Stationary (Ducts #4 through #7), (Ducts #9 through #12) and (Ducts

#12A, #14, #16, and #17). (FIGURE 2-10)

This task covers:

a. Repair

INITIAL SETUP :

Tools

Equipment Condition

Tool kit, general mechanic's,

Circuit breaker switch OFF, power panel

locked and tagged "Out of Service -

Tool kit, electrician's,

Do Not Operate."

Materials/Parts

Heating element P/N 52424179

(Ducts 4, 6, 9, 12, 12A, and 14)

P/N 52424178 (Ducts 5, 7, 10, 11, and

16) P/N 52424180 (Duct 17)

Electrical tag, Item 1, Appendix C

REPAIR

Repair consists of replacing heating elements.

Open heater front cover (7).

Tag electrical line connections at terminal ends of heating element (4).

Remove terminal nuts (6) and washers (5).

Separate line connections from terminal ends of heating element (4).

Remove mounting flange screws (2) securing-heating assembly (3) to box (1) at top and bottom.

Slide heating assembly (3) out of terminal box enclosure (1).

Remove heating element (4).

Install heating element (4) into heater assembly (3).

Slide heating element (3) into terminal box enclosure (1).

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