FIGURE 2-159. Pressure Operated Switch.

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FIGURE 2-158. Surface Fire Pull Boxes.

TM-55-1905-223-10 Landing Craft Utility (LCU 200 Class) NSN 1905-01-154-1191 Manual

Paint Locker Halon Operation.

TM 55-1905-223-10

NOTE

Alarm siren will sound in main engine room. Discharge of HALON will be delayed for

60 seconds to allow evacuation of main engine room personnel. Discharge of HALON

is completed in 10 seconds.

During the 60-second warning time, four PRESSURE OPERATED SWITCHES automatically

shut down the main engine room console, two main engines, two ship service diesel generators,

fuel oil supply pumps, and the ventilation system in the main engine room. Before this

equipment can be restarted, the four PRESSURE OPERATED SWITCHES located near the

HALON bottles on the forward bulkhead of the emergency generator room must be reset.

The resetting of the four PRESSURE OPERATED SWITCHES does not reset the HALON

1301 Fire Suppression System. The HALON and CO cylinders must be recharged or

replaced and the pull boxes reset by depot maintenance when the LCU is docked.

(2) Reset plunger. After the fire has been extinguished, and at least 30 minutes have passed, and

equipment is to be restarted, reset the four PRESSURE OPERATED SWITCHES (FIGURE 2-159)

located near the HALON bottles on the forward bulkhead of the Emergency Generator Room by pushing

RESET PLUNGER (1) down to the SET position.

1. RESET PLUNGER

FIGURE 2-159. Pressure Operated Switch.

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