Victaulic 768N FireLock NXT Series Installation, Maintenance, And Testing Manual Download | Manualshive

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I-768N

/ Series 768N FireLock NXT

™

Dry Valve

/ Installation, Maintenance, and Testing Manual

SECTION I

• Initial System Setup

I-768N_10

REV_C

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Summary of Contents for 768N FireLock NXT Series

Page 1: ...ore attempting to install remove adjust or perform maintenance on any Victaulic piping products Wear safety glasses hardhat and foot protection Save this installation maintenance and testing manual fo...

Page 2: ...se the 1 4 turn vent ball valve Step 9b If a Series 746 LPA Dry Accelerator is installed open the isolation ball valve This will set the accelerator Step 10 Open the water supply main drain valve Step...

Page 3: ...the water flow alarm test will be performed 2 Open the water supply main drain valve fully to flush the water supply of any contaminants 3 Close the water supply main drain valve 4 Open the alarm test...

Page 4: ...failure resulting in death or serious personal injury and property damage 1 Read and understand all instructions and refer to the trim diagrams before installing maintaining or testing this Victaulic...

Page 5: ...Vic Quick Riser VQR assembly is shown 1 Ensure that all components are included in the shipment and that all necessary tools are available for installation Verify that the provided trim drawing match...

Page 6: ...ns inches mm Approx Weight Each lbs kg A A1 B C D D1 E F G H K Without Trim With Trim 1 9 00 16 37 32 75 9 25 16 50 11 00 9 25 3 25 10 25 22 50 6 00 16 7 43 0 228 60 415 80 832 235 419 279 235 83 260...

Page 7: ...FireLock NXT Dry Valve 2 FireLock Rigid Coupling 3 Water Supply Main Control Valve 4 Drip Cup 5 Water Supply Main Drain Valve Flow Test 6 System Pressure Gauge Gauge Valve Assembly 7 System Main Drai...

Page 8: ...ssembly Bolt 8 Clapper Spring 9 Clapper Shaft 10 Clapper Shaft Bushing and O Ring Qty 2 Item Description 11 Cover Plate 12 Cover Plate Gasket 13 Cover Plate Bolts 14 Latch 15 Latch Spring 16 Latch Spr...

Page 9: ...unted air compressor provides the greatest protection for systems When shop air or a tank mounted air compressor is used the Series 757 Regulated AMTA must be installed The Series 757 Regulated AMTA p...

Page 10: ...I 768N Series 768N FireLock NXT Dry Valve Installation Maintenance and Testing Manual SECTION I Initial System Setup I 768N_10 REV_C...

Page 11: ...st ball valve is closed Step 4 Charge the system with air by turning on the compressor or by opening the fast fill ball valve on the AMTA Charge the system to 13psi 90kPa 0 9Bar minimum Refer to the A...

Page 12: ...ater to flow through the auto drain tube Step 9 Verify that the charge line pressure is equal to the supply pressure and verify that the auto drain is set by pulling up on the auto drain sleeve Step 9...

Page 13: ...jurisdiction remote station alarm monitors and those in the affected area that the system is in service Valve Normal Operating Position Water Supply Main Control Valve Open Water Supply Main Drain Va...

Page 14: ...I 768N Series 768N FireLock NXT Dry Valve Installation Maintenance and Testing Manual SECTION II Resetting the System I 768N_14 REV_C...

Page 15: ...main drain valve Confirm that the system is drained Step 3a Push in the ball drip plunger to release pressure Step 4 Close the system main drain valve Step 5 Confirm that all system drains are shut an...

Page 16: ...accordance with current NFPA 25 requirements or in accordance with the requirements of the local authority having jurisdiction whichever is more stringent Always refer to the instructions in this man...

Page 17: ...echanical damage and corrosion Replace any damaged or corroded parts 4 Confirm that the dry valve and trim are located in an area that is not subject to freezing temperatures 5 Confirm that all valves...

Page 18: ...quirements The frequency of inspections must be increased in the presence of contaminated water supplies corrosive scaling water supplies and corrosive atmospheres Any activities that require taking t...

Page 19: ...water supply main drain valve is fully open record the water supply pressure from the water supply gauge as the r esidual pressure 8 Close the water supply main drain valve slowly 9 Record the water p...

Page 20: ...upply main drain valve fully to flush the water supply of any contaminants 3 Close the water supply main drain valve 4 Open the alarm test ball valve Confirm that mechanical and electrical alarms are...

Page 21: ...ow air alarm activates 8 Close the system main drain valve 9 Close the slow fill ball valve on the AMTA if equipped 10 Open the fast fill ball valve on the AMTA Bring the pressure back up to the norma...

Page 22: ...drain valve fully to flush the water supply of any contaminants 4 Close the water supply main control valve to the point where additional closure will not provide flow through the water supply main dr...

Page 23: ...alve fully to flush the water supply of any contaminants 4 Close the water supply main drain valve 5 Open the remote system test valve inspector s test connection to simulate the operation of a sprink...

Page 24: ...f the local authority having jurisdiction whichever is more stringent Always refer to the instructions in this manual for additional inspection and testing requirements The frequency of inspections mu...

Page 25: ...e removed Failure to follow this instruction could result in death or serious personal injury and property damage 11 After all pressure is released from the system loosen the cover plate bolts slowly...

Page 26: ...ntaining the fire protection system in proper operating condition To ensure proper system operation valves must be inspected in accordance with current NFPA 25 requirements or in accordance with the r...

Page 27: ...ION Use only Victaulic supplied replacement parts Failure to follow this instruction could cause improper valve operation resulting in property damage 6 Pry the clapper seal along with the seal ring o...

Page 28: ...Y BOLT BOLT SEAL TORQUES Nominal Size inches or mm Required Torque inch lbs N m 1 1 2 40 5 2 40 5 2 1 2 90 10 76 1mm 90 10 3 90 10 4 110 12 165 1mm 160 18 6 160 18 8 160 18 12 Replace the cover plate...

Page 29: ...haft bushings into the valve body until hand tight 9b Tighten the clapper shaft bushings until metal to metal contact occurs with the valve body DO NOT exceed 10 ft lbs 14 N m of torque on the clapper...

Page 30: ...2 1 2 60 81 76 1mm 60 81 3 60 81 4 100 136 165 1mm 115 156 6 115 156 8 100 136 6 Place the system back in service by following the Resetting the System section REMOVING AND REPLACING THE DIAPHRAGM 1...

Page 31: ...e Required Internal Inspection section 2 Remove the existing cartridge from the air manifold and priming manifold assemblies shown above Rinse the cartridges to remove any deposits 3 Install the corre...

Page 32: ...I 768N Series 768N FireLock NXT Dry Valve Installation Maintenance and Testing Manual SECTION VII Troubleshooting I 768N_32 REV_C...

Page 33: ...ricting airflow When the AutoVent Sleeve of the Series 776 Low Pressure Actuator is pulled up the screw does not stay set in the UP position The Series 776 Low Pressure Actuator is not receiving enoug...

Page 34: ...it und ohne Schnell ffner S 746 LPA Approval no G4070037 Name of product NXT S 768 DN 100 mit und ohne Schnell ffner S 746 LPA Approval no G4070038 Name of product NXT S 768 DN 150 mit und ohne Schnel...

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