REPLACE HEATER ASSEMBLY

TM 5-6350-275-24&P

3-52. REPLACE HEATER ASSEMBLY. (Figure 3-39 and FO-6, sheet 1).

This task consists of:

a. Remove

b. Install

INITIAL SETUP

Tools:

Equipment Condition:

Screwdriver, Flat tip (Item 6, App B)

AC adapter disconnected

Screwdriver, Flat tip (Item 7, App B)

General Safety Instructions:

Remove all jewelry while working on equipment.

Materials/Parts:

(110 VAC PN# 3569-H99)

Heater assembly

(220 VAC PN# 5723-H99)

WARNING

When working on high-voltage components, always have an additional person

present, and keep one hand away from equipment to reduce hazard of current

flowing through vital organs of body. Remove all jewelry from fingers, wrists, and

neck before working on electrical components.

Shut off power source before attempting to disconnect, service, or connect wires

or cables. Failure to do so may result in serious injury or death.

a. Removal

(1) Open and remove front access cover from NEMA 4 enclosure.

(2) Remove ac input power cord for power receptacle (7) from AC power source.

(3) Remove four screws (18), holding heater assembly cover (19) to panel assembly (1).

(4) Remove two ac input power wires from heater assembly (5).

(5) Using a flat tip screwdriver, remove two screws holding heater assembly (5) to panel assembly (1).

(6) Remove heater assembly from enclosure.

b. Installation

CAUTION

Be sure replacement heater is rated at same voltage as the removed one.

(1) Place heater assembly in enclosure.

(2) Align heater assembly with rear panel, and secure it with two screws.

(3) Connect two ac input power wires to heater assembly (5).

(4) Align heater assembly cover (19) with rear panel, and secure with four screws (18).

(5) Connect ac input power cord for power receptacle (7) to AC power source.

(6) Connect AC adapter to power source.

(7) Place front access cover on NEMA 4 enclosure and secure it.

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