Victaulic FireLock 751 Series Installation, Maintenance, And Testing Manual
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Victaulic FireLock 751 Series Installation, Maintenance, And Testing Manual

Alarm check valve
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INSTALLATION, MAINTENANCE, AND TESTING MANUAL
Series 751 FireLock
(UL/FM Alarm Valve and Trim With or Without Excess Pressure Pump)
• Series 751 FireLock
™
Alarm Check Valves shall be used only in fire protection systems that are designed and installed in accordance with
current, applicable National Fire Protection Association (NFPA 13, 13D, 13R, etc.) standards, or equivalent standards, and in accordance
with applicable building and fire codes. These standards and codes contain important information regarding protection of systems from
freezing temperatures, corrosion, mechanical damage, etc.
• These installation instructions are intended for an experienced, trained installer. The installer shall understand the use of this product and
why it was specified for the particular application.
• The installer shall understand common industry safety standards and potential consequences of improper product installation.
Failure to follow installation requirements and local and national codes and standards could compromise system integrity or cause system
failure, resulting in death or serious personal injury and property damage.
REV_G
™
Alarm Check Valve
• Read and understand all instructions before attempting to install any Victaulic products.
• Always verify that the piping system has been completely depressurized and drained
immediately prior to installation, removal, adjustment, or maintenance of any Victaulic
products.
• Wear safety glasses, hardhat, and foot protection.
• Failure to follow these instructions could result in death or serious personal injury and
property damage.
WARNING
KEEP THESE INSTRUCTIONS WITH THE
INSTALLED VALVE FOR FUTURE REFERENCE
to Videos and Additional
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Summary of Contents for Victaulic FireLock 751 Series

  • Page 1 Videos and Additional Publications WARNING • Read and understand all instructions before attempting to install any Victaulic products. • Always verify that the piping system has been completely depressurized and drained immediately prior to installation, removal, adjustment, or maintenance of any Victaulic products.
  • Page 2 SERIES 751 FIRELOCK ™ ALARM CHECK VALVE THIS QUICK REFERENCE SECTION IS FOR PLACING THE SYSTEM IN SERVICE AND FOR PERFORMING REQUIRED MAIN DRAIN TESTS. AN EXPERIENCED, TRAINED INSTALLER SHALL READ AND UNDERSTAND THE FULL CONTENTS OF THIS MANUAL AND ALL WARNING MESSAGES BEFORE ATTEMPTING TO PLACE THE SYSTEM INTO SERVICE.
  • Page 3 System Main Drain Valve Water Supply Main Control Valve Alarm Line Ball Valve Alarm Test Line Ball Valve REQUIRED MAIN DRAIN TEST Refer to NFPA 25, FM Datasheets, or any applicable local requirements to perform main drain tests. The authority having jurisdiction in the area may require these tests on a more frequent basis.

  • Page 4: Table Of Contents

    SECTION VII install, remove, adjust, or maintain any Victaulic piping products. Troubleshooting ........24 Failure to follow these instructions can cause product failure, resulting in death or serious personal injury and property damage.

  • Page 5: Important Installation Information

    Remove all plastic caps and foam spacers from the valve. Optional Alarm Pressure Switch Install the valve assembly into the riser with two Victaulic rigid couplings. Refer to the instructions, supplied with the coupling, for complete installation requirements. SERIES 751 FIRELOCK...

  • Page 6: Trim Dimensions - Standard Trim And Trim For Use With Excess Pressure Pump (Without Drain Connection Kit And Water Supply Main Control Valve Options)

    I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual TRIM DIMENSIONS − STANDARD TRIM AND TRIM FOR USE WITH EXCESS PRESSURE PUMP (WITHOUT DRAIN CONNECTION KIT AND WATER SUPPLY MAIN CONTROL VALVE OPTIONS) A 4-INCH/DN100 FIRELOCK™ ALARM CHECK VALVE WITH STANDARD TRIM IS SHOWN BELOW Full Open NOTES: The “A”...

  • Page 7: Trim Dimensions - Standard Trim And Trim For Use With Excess Pressure Pump (With Drain Connection Kit And Water Supply Main Control Valve Options)

    I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual TRIM DIMENSIONS − STANDARD TRIM AND TRIM FOR USE WITH EXCESS PRESSURE PUMP (WITH DRAIN CONNECTION KIT AND WATER SUPPLY MAIN CONTROL VALVE OPTIONS) A 4-INCH/DN100 FIRELOCK™ ALARM CHECK VALVE WITH OPTIONAL DRAIN CONNECTION KIT AND WATER SUPPLY MAIN CONTROL VALVE IS SHOWN BELOW Full Open NOTES: The “A”...

  • Page 8: Trim Components (Standard) - Exploded View Drawing

    I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual TRIM COMPONENTS (STANDARD) – EXPLODED VIEW DRAWING To Water Motor Alarm or Optional Series 752V Retard Vent Kit Optional Location for Item 8 Normally Open (Lockable) Pipe to Open Drain To System...

  • Page 9: Trim Components (Excess Pressure Pump) - Exploded View Drawing

    I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual TRIM COMPONENTS (EXCESS PRESSURE PUMP) – EXPLODED VIEW DRAWING To Water Motor Alarm or Optional Series 752V Retard Vent Kit From Excess Optional Location Pressure Pump for Item 8 Normally Open To Excess...

  • Page 10: Internal Valve Components - Section View And Exploded View Drawings

    I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual INTERNAL VALVE COMPONENTS – SECTION VIEW AND EXPLODED VIEW DRAWINGS Clapper NOTICE For 4 – 6-inch/DN100 – DN150 and 165.1-mm sizes of Series 751 Alarm Check Valves: Clapper Seal •...

  • Page 11: Series 751 Firelock Alarm Check Valve (Standard Trim) - Trim Assembly Drawing Numbers

    I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual SERIES 751 FIRELOCK ALARM CHECK VALVE SERIES 751 FIRELOCK ALARM CHECK VALVE (STANDARD TRIM) – TRIM ASSEMBLY (TRIM FOR USE WITH EXCESS PRESSURE DRAWING NUMBERS PUMP) –...

  • Page 12: Initial System Setup

    I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual SECTION I • Initial System Setup I-751_9 REV_G...
  • Page 13 I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual INITIAL SYSTEM SETUP WARNING WARNING • The alarm line ball valve (lockable) shall remain in the open • The Series 751 Alarm Check Valve and supply piping shall be position to allow alarms to activate.

  • Page 14: Resetting The System

    I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual SECTION II • Resetting the System I-751_11 REV_G...
  • Page 15 I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual RESETTING THE SYSTEM Step 1: Step 5: Close the water supply main control valve. Confirm that the system has been depressurized. The gauges should indicate zero pressure. Step 2: Step 6: Open the system main drain valve.

  • Page 16: Inspection/Testing Requirements

    I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual SECTION III • Inspection/Testing Requirements WARNING • The building owner or their representative is responsible for maintaining the fire protection system in proper operating condition. •...
  • Page 17 I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual DAILY/WEEKLY INSPECTION Refer to NFPA 25, FM Datasheets, or any applicable local requirements Confirm that all valves are in their normal operating positions (refer to perform daily/weekly inspections. The authority having jurisdiction in to the table below).

  • Page 18: Required Main Drain Test

    I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual SECTION IV • Required Main Drain Test WARNING • The building owner or their representative is responsible for maintaining the fire protection system in proper operating condition. •...
  • Page 19 I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual REQUIRED MAIN DRAIN TEST Refer to NFPA 25, FM Datasheets, or any applicable local requirements Open the alarm line ball valve. to perform main drain tests. The authority having jurisdiction in the Confirm that all valves are in their normal operating positions (refer area may require these tests on a more frequent basis.

  • Page 20: Required Internal Inspection

    I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual SECTION V • Required Internal Inspection WARNING • Depressurize and drain the piping system before attempting to remove the cover plate from the valve. • The building owner or their representative is responsible for maintaining the fire protection system in proper operating condition.
  • Page 21 I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual REQUIRED INTERNAL INSPECTION Refer to NFPA 25, FM Datasheets, or any applicable local requirements CAUTION to perform internal inspections. The authority having jurisdiction in the area may require these inspections on a more frequent basis.
  • Page 22 I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual SECTION VI • Removing and Replacing the Clapper Seal (All Sizes) • Removing and Replacing the Clapper Assembly (All Sizes) • Installing the Cover Plate Gasket and Cover Plate WARNING •...

  • Page 23: Removing And Replacing The Clapper Seal (All Sizes)

    DN40 – DN80 and 8-inch/DN200 sizes, verify that the seal ring is removed with the clapper seal. Discard the old clapper seal and replace it with a new, Victaulic-supplied clapper seal assembly. Proceed to step 6a for 1 1/2 – 3-inch/DN40 – DN80 and 8-inch/ Remove the seal retaining ring.
  • Page 24 Clean out any holes that are plugged in the valve body seat ring. DN50 60.3 DO NOT USE SOLVENTS OR ABRASIVES. If the clapper requires 2 1/2 2.875 73.0 replacement, contact Victaulic and follow the “Removing and 3.000 Replacing the Clapper Assembly (All Sizes)” section. DN65 76.1 3.500 DN80 88.9...

  • Page 25: Removing And Replacing The Clapper Assembly (All Sizes)

    • DO NOT use solvents or abrasives on or near the valve body seat ring. • Use only Victaulic-supplied replacement parts. Place the other spacer between the clapper and valve body. Finish Failure to follow these instructions could cause improper valve inserting the clapper shaft through the clapper arm and valve operation, resulting in property damage.

  • Page 26: Installing The Cover Plate Gasket And Cover Plate

    Size Actual Outside Verify that the cover plate gasket is in good condition. If the gasket Nominal Diameter is torn or worn, replace it with a new, Victaulic-supplied gasket. inches inches Required Torque inch-lbs/N•m 1 1/2 1.900...

  • Page 27: Troubleshooting

    I-751 / Series 751 FireLock ™ Alarm Check Valve / Installation, Maintenance, and Testing Manual SECTION VII • Troubleshooting TROUBLESHOOTING – SYSTEM Problem Possible Cause Solution The system water pressure gauge is fluctuating with the supply The check valve in the bypass line is installed backward. Check the orientation of the bypass check valve.
  • Page 28 For complete contact information, visit victaulic.com I-751 2219 REV G UPDATED 06/2019 ZI00751000 VICTAULIC AND FIRELOCK ARE REGISTERED TRADEMARKS OR TRADEMARKS OF VICTAULIC COMPANY AND/OR ITS AFFILIATED ENTITIES IN THE UNITED STATES AND/OR OTHER COUNTRIES. © 2019 VICTAULIC COMPANY. ALL RIGHTS RESERVED.

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