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SECTION III - SYSTEM COMPONENTS UL EX. 5174 8-1-99 Page 3-8 REV. 2 MANUAL RESET RELAY . The manual reset relay, Part No. 426151, is required when using an electrical gas valve shut-off system. After the electric gas valve has closed, either due to system actuation or power failure, the valve can not be re-opened, allowing gas to flow. until the reset relay button is manually pressed, re-energizing the circuit The reset relay is available 120 VAC. The manual reset relay is also recommended for electrical shut down. . FIGURE 26 oeml7 ELECTRICAL SWITCHES The electrical switches are intended for use with electric gas valves, alarms, contactors, lights, contractor supplied electric power shut-off devices and other electrical devices that are designed to shut off or turn on when the system is actuated. Switches are available in kits: One Switch Kit, Part No. 423878, Two Switch Kit, Part No. 423879, Three Switch Kit, Part No. 423880, and Four Switch Kit, Part No. 423881. Each switch has a set of single-pole. double-throw contacts rated at 21 amp, 1 HP. 125,250,277 VAC or 2 HP, 250, 277 VAC. Mounting hardware is provided with each kit. N.C, . FIGURE 27 001612 BURSTING DISC The Bursting Disc is installed in the tank adaptor assembly. The bursting disc eliminates the siphoning of the agent up the pipe dur- ing extreme temperature variations. The bursling discs are avail- · able in packs of 10, Part No. 423666. ~~ . FIGURE 28 000172 REGULATOR TEST KIT The Test Kit Assembly (Shipping Part No. 56972) is required to test the regulator setting and nitrogen flow during 12-year mainte- nance examinations. This will ensure that the regulator is func- tioning properly. ~ . FIGURE 29 000169 WATER PRESSURE TESTING ASSEMBLY The Ansul Water Pressure Testing Assembly, Part No. 423556, is used to determine if the water supply used in the PIRANHA System has a high enough pressure to function properly. The assembly is attached to the test outlet in the ANSUL AUTOMAN Release Assembly. The test assembly contains a built-in orifice to simulate system water flow characteristics. When the test outlet is opened, allowing the water to flow, the water pressure is indicated on the gauge on the Testing Assembly. Each AUTOMAN or Regulated Actuator on the same water supply requires its own Pressure Testing Assembly during the pressure test. . FIGURE 30 00'688