2204 12TH ST 2020-08-28 - Laserfiche WebLink

f SECTION 4—SYSTEM DESIGN R-102 Restaurant Fire Suppression Manual UL EX3470 ULC EX3470 PAGE 4-74 REV. 11 2014-SEP-01 MECHANICAL GAS VALVE REQUIREMENTS ELECTRICAL GAS VALVE REQUIREMENTS ( . An ANSUL or ANSUL approved mechanical gas shut-off valve A UL Listed electrically-operated gas shut-off valve can be system can be attached to the R-102 system.The system works attached to the R-102 system to provide an electrical means of both mechanically and pneumatically by use of an air cylinder shutting off the gas line at a predetermined point. If an electric located inside the regulated release assembly. Upon actuation gas shut-off valve is used in the system it must be attached of the fire suppression system, a pneumatically-operated air with both an electric (snap-action) switch and a manual reset cylinder assembly will mechanically close the gas shut-off valve. relay.For more information on the types of electric(snap-action) The total length of the cable for each mechanical gas valve must switches, refer to the Electrical Switch,Field Installation section. not exceed 150 ft (45.7 m). The maximum number of pulley The manual reset relay is reviewed in this section. elbows that may be used is 20 for each valve. All electrical connections should be performed by a QUALIFIED •One pulley tee is allowed per cable system. • ELECTRICIAN and in accordance with authority having The maximum length of cable from the AUTOMAN to a gas valve jurisdiction. is 150 ft(45.7 m)with a maximum of 20 pulley elbows used per The following is a brief explanation of how the R-102 system side of the tee.As the tee is located farther from the AUTOMAN, operates with an Electric Gas Shut-off Valve attached: the 150 ft (45.7 m) maximum must be observed but as pulley With the regulated release cocked in the ready condition, the elbows are placed between the AUTOMAN and the tee, they normally closed contacts in the snap-action switch allow current must be deducted from the available pulley elbows (20) allowed to flow to the manual reset relay. With the relay coil energized, on each side. normally open contacts in the reset relay close, allowing the Example:If 10 pulley elbows are placed between the AUTOMAN solenoid in the gas valve to be energized. and the pulley tee, the maximum available pulley elbows left for use on each side of the tee is 10 per side. See Figure 4-144 for Once the R-102 system is activated, the normally closed three different examples. contacts in the snap-action switch will open, de-energizing the Parts that may be used for installation of a Mechanical Gas reset relay.This will,in turn,open the contacts in the relay which Shut-off Valve are: will cause the gas valve to become de-energized and close. Description • Part No. The system must be re-armed and the"push to reset"button on Gas Valve/Actuator 3/4 in.Assembly(ANSUL)* 55598 the reset relay must be operated to reopen the gas valve. Gas Valve/Actuator 1 in.Assembly(ANSUL)* 55601 It is important to note that a power failure or an electrical power(, Gas Valve/Actuator 1 1/4 in.Assembly(ANSUL)* 55604 interruption will cause the gas valve to close even though the Gas Valve/Actuator 1 1/2 in.Assembly(ANSUL)* 55607 system was not fired. Gas Valve/Actuator 2 in.Assembly(ANSUL)* 55610 In either case, whether in a fired condition or when a power Gas Valve/Actuator 2 1/2 in.Assembly(ASCO)* 25937 failure has occurred, the manual reset relay and electric gas Gas Valve/Actuator 3 in.Assembly(ASCO)* 25938 shut-off valve must be reset to resume a normal operating condi- Pulley Elbow 423250 tion. For resetting, refer to the "Recharge and Resetting Pulley Elbow 415670 Procedures"section in this manual. Pulley Tee 427929 1/16 in. Stainless Steel Cable 15821 or 50 ft(15.2 m)or 500 ft(152.4 m) roll 79653 Oval Press-To-Crimp Sleeve 4596 Stop Sleeve(2) 26317 *Assembly includes parts listed below: Air Cylinder Assembly 15733 Air Cylinder 15521 Tubing Assembly 15529 Copper Tubing, 1/8 in. 15525 Male Elbow 15523 Male Connector 15522 Machine Screw(2) 15421 Hex Nut(2) 15527 Lockwasher(2) 4141 Visual Inspection Seal(2) 197 All valves above are UL listed and approved. They may be .mounted in any position. Pipe threads are type NPT. Ambient operating temperature range of all valves is 32 °F to 120 °F (0 °C to 49 °C). The valves are not weatherproof and must be located indoors in areas approved by the "authority having jurisdiction."