Utility Equipment and Water System

TM 5-6640-213-14

3. In the event of an ALARM or FAILURE from the

combustible alarm system, relay K4 is energized, along with light/

buzzer. This causes contacts K4A to close, ensuring that the fan is

energized regardless of the position of switch S3.

NOTE

If the "emergency" mode of operation,

circuit breakers CB3 and CB6 must be on.

4. After the gas has been exhausted, or the

failure corrected, the combustible alarm system must be manually

reset. This causes relay K4 to become deenergized; contacts K4A

open, and the fan control is returned to switch S3.

5. Depressing the main power switch S1 to OFF

causes relay K1 to be deenergized. Contacts KIA open, isolating K1.

Contacts KIB open, deenergizing the timer; and timer contacts 7 and 8

open, deenergizing relay K2 and contactor K3. This deenergizes the

entire electrical system beyond circuit breaker CB1.

NOTE

Interruption of electrical power resets all elec-

trical circuits to the original condition. Inital

start-up procedures must be followed.

(2) Utility Equipment and Water System.

The water system (fig. 2-3) is

(a) Description.

described below.

1. Pump The water pump is a 7-gpm centrifugal

pump driven by a l/20-horsepower electric motor. The pump impeller

is attached directly to the end of the motor shaft. The pump housing,

which is bolted to the motor housing, is provided with a mechanical

spring-loaded shaft seal to prevent-leakage around the shaft. Pump

and motor are bolted to the floor beneath the sink and beside the

water reservoir, to which the suction inlet of the pump is connected.

The pump discharge outlet is connected to the sink supply line.

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