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, , SECTiON tV—SYSTEM DESIGN ' UL EX. 5174 10-31-97 Page 4-13 MECHANICAL GAS VALVE REQUIREMENTS ELECTRICAL GAS VALVE REQUIREMENTS An Ansul orAnsul approved mechanical gas shut-off valve system A UL Listed electrically-operated gas shut-off valve can be can be attached to the PIRANHA system.The system works both attached to the PIRANHAsystem to provide an electrical means of mechanically and pneumatically by use of an air cylinder located shutting off the gas line at a predetermined point. If an electric gas inside the regulated release assembly Upon actuation of the fire shut-off valve is used in the system it must be attached with both suppression system,a pneumatically-operated air cylinder assem- an electric (snap-action) switch and a manual reset relay For bly will mechanically close the gas shut-off valve. more information on the types of electric (snap-action) switches, The total length of the cable for the mechanical gas valve must not refer to the Electrical Switch, Fieid Installation section. exceed 150 ft.(46 m).The maximum number of pulley elbows that AI� electrical connections should be performed by a QUALIFIED may be used is 20 ELECTRICIAN and in accordance with authority having jurisdiction. One pulley tee (Part No 15342) is aflowed per system. The following is a brief explanation of how the PIRANHA system Exception: When using a pulley tee, Part No 15342, the maxi- operates with an Electric Gas Shut-off Valve attached: mum length of wire rope to each gas valve (maximum of two gas With the regulated release cocked in the ready condition,the nor- valves) must not exceed 125 ft. (38 m) and the maximum number mally closed contacts in the snap-action switch allow current to of elbows must not exceed 18 flow to the manual reset relay. With the relay coil energized, nor- Parts that may be used for installation of a Mechanical Gas Shut- mally open contacts in the reset relay close, aliowing the solenoid off Valve are in the gas valve to be energized. Description Part No. Once the PIRANHA system is activated, the normally ciosed con- tacts in the snap-action switch will open, de-energizing the reset Gas Valve/Actuator 3/4 in.Assembly (Ansul)` 55598 relay This will, in turn, open the contacts in the relay which wil( Gas Valve/Actuator 1 in.Assembly (Ansul)" 55601 cause the gas valve to become de-energized and close Gas Valve/Actuator 1 1/4 in.Assembly(Ansul)' 55604 Gas Valve/Actuator 1 1/2 in.Assembly(Ansul)' 55607 The system must be re-armed and the "push to reseY' button on Gas Valve/Actuator 2 in.Assembly(Ansul)" 55610 the reset relay must be operated to reopen the gas valve. Gas Valve/Actuator 2 1/2 in.Assembly(ASCO)" 25937 It is important to note that a power failure or an electrical power Gas Valve/Actuator 3 in.Assembly(ASCO)' 25938 interruption will cause the gas valve to close even though the sys- Pulley Elbow" 423250 tem was not fired. Pulley Elbow" 415670 In either case,whether in a fired condition or when a ower failure Pulley Tee'�" 15342 has occurred, the manual reset relay and electric gas shut-off 1/16"Stainless Steel Cable 15821 or valve must be reset to resume a normal operating condition. For 50 ft. (15 m) or 500 ft. (152 m) roll 79653 resetting, refer to the "Recharge and Resetting Procedures" Oval Press-To-Crimp Sleeve 4596 section in this manual. Stop Sleeve (2) 26317 ' Assembly includes parts listed below: IQppl'OV1�S " Approved for 700°F(371°C)temperature areas. "' Used with two(2)ANSULAUTOMAN releases to operate one(1)mechanical gas valve. Al1SUI g8S VaIV@S IISt2CI Ifl tIIIS S@Ct1011 8C2 UL IISteCj a11CI$pP�OV@C� Air Cylinder Assembly 15733 for 110 VAC If more information is required, refer to the Gas and Air Cylinder 15521 Oil Equipment List of Underwriters Laboratories, Inc. under Tubing Assembly 15529 "Electrically Operated Valves Guide No. 440 A5" or consult Ansul Copper Tubing, 1/8 in 15525 Incorporated, Marinette,Wisconsin 54143-2542. Male Elbow 15523 If other gas valves are used, they shall be "UL listed electrically- Male Connector 15522 operated safety valves for natural or LP gas as required,of appro- Machine Screw(2) 15427 priate pressure and temperature rating, 110 VAC/60 Hz." The Hex Nut(2) 15527 information on temperature and type of gas that the valves are Lockwasher(2) 4141 suitable for may be found in the Gas and Oil Equipment List of Visual Inspection Seal (2) 197 Underwriters Laboratories, Inc. under "Electrically Operated All valves above are UL listed and approved.They may be mount- Valves Guide No. 440 A5" ed in any position. Pipe threads are type NPT Ambient operating The electrically operated gas valve must be of the type that needs temperature range of all valves is 32 °F to 130°F(0°C to 54°C) to be energized to remain open. The valves are not weatherproof and must be located indoors in Parts that may be used for installation of a 110 VAC Gas Shut-off areas approved by the"authority having jurisdiction." Valve are• Description Part No. Electric Solenoid Valve, 3/4 in. NPT" 13707 Electric Solenoid Valve, 1 in. NPT' 13708 Electric Solenoid Valve, 1 1/2 in. NPT* 13709 Electric Solenoid Valve, 2 in. NPT* 13710 Electric Solenoid Valve, 3 in. NPT* 17643 Manual Reset Relay(110 VAC) 14702 'Vaives are normally closed when de-energized.