1-17. VALVE CONTROLS.1-18.LOCAL MANUAL RELEASE. Local manual operation is obtained by a lever operated device mounted to the pilotport of the valve. See K-4020.1-19.REMOTE MANUAL RELEASE. The remote activation of the cylinder valve is accomplished through the breakglass pull box, Z-Bracket, 1/16" stainless steel cable and corner pulleys interconnected with 3/8" steel pipe. The twobreak glass pull boxes are connected to the cable operated control head through the dual pull mechanism. See K-4040,K-4041,K-4080, K-4100 and K-4020.1-20.STOP VALVE. Release of Halon 1301 from the manifold is control by the 11/2" stop valve. See K-3070.1-21.LEVER OR PRESSURE OPERATED CONTROL HEAD. The stop valve is operated when the lever or pressureoperated control head is operated in either the lever or pressure mode. See K-3150.1-22.LEVER OPERATED CONTROL HEAD. The discharge delay can be manually overridden by operation of theattached lever operated control head. See K-4010.1-23.CONTROL AND WARNING DEVICES.1-24.DISCHARGE DELAY. The operation of the stop valve is delayed for a minimum of twenty seconds by thedischarge delay. See K-3190 and K-3191.1-25.PRESSURE OPERATED SIREN. The siren provides an audible predischarge warning to personnel in void 4 portor starboard. See K-3200.1-26.ACCESSORY EQUIPMENT.1-27.PRESSURE OPERATED SWITCH. This device operates from Halon pressure when the cylinder valve opens. Abuilt-in switch changes position to de-energize void 4 ventilation fan circuits and shut-down machinery. See K-3160.1-28.DISCHARGE INDICATOR. This device has an indicating plunger that is moved from a normal (non-visual)position to a discharged indication position when Halon pressure is present in the manifold. See K-3110.1-29.SAFETY OUTLET. This device provides an over-pressure relief at between 750-900 PSI. See K-3120.
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