Victaulic FireLock 751 Series

Other manuals for Victaulic FireLock 751 Series

Installation, Maintenance, & Testing Manual18 pages

Questions and Answers

T
tdayAug 15, 2025
What to do if water is leaking from the intermediate chamber of my Victaulic Plumbing Product?
- R
  Ruth CarrollAug 15, 2025
  If water is leaking from the intermediate chamber, check the clapper seal and seat for physical damage and ensure no debris is present. Make sure there is no vacuum in the alarm line; if there is, install the Series 752V Retarding Vent Kit or create an air break. Shut off any flow coming from downstream of the valve, and verify that the bypass line is installed properly. The cause may be that water is getting past the seal, flow is coming from downstream of the valve, or a differential has not been created across the valve.
D
Daniel FloresAug 18, 2025
Why is the water motor gong not ringing or ringing weakly in my Victaulic Plumbing Product?
- R
  Robert LeeAug 18, 2025
  If the water motor gong is not ringing or ringing weakly, verify that the holes in the valve body seat ring are not plugged and that the orifice from the intermediate chamber to the alarm line is not plugged. Ensure there are check valves isolating the alarm line of each valve in the system and that the proper restrictor size is installed in the restricted orifice/alarm line drain. If the correct restrictor size is not installed, refer to the trim drawing to replace it. This issue can occur if no water is going into the intermediate chamber, water from the alarm line is leaking out of the restricted orifice/ alarm line drain of another valve, or the wrong restrictor size is installed.
W
woodsgregoryAug 21, 2025
How to fix a fluctuating system water pressure gauge in Victaulic Plumbing Product?
- P
  Philip MillerAug 21, 2025
  To fix a fluctuating system water pressure gauge, check the orientation of the bypass check valve, ensuring the arrow points from the supply side to the system side. Remove the threaded cap to the check valve and remove any debris. Verify that the clapper is free to move. This issue is caused by the check valve in the bypass line being installed backward or debris being present in the bypass check valve.
S
Sara RoweAug 25, 2025
What to do if the Victaulic FireLock 751 Control Unit water motor gong is not ringing?
- T
  Tiffany ButlerAug 25, 2025
  If the Victaulic Control Unit's water motor gong isn't ringing or the ringing is weak, it could be due to several reasons. First, ensure that water is actually entering the intermediate chamber and that the holes in the seat ring are not blocked. Check that water isn't leaking from the alarm line drain of another valve. Verify that check valves isolate the alarm line of each valve in the system. Finally, confirm the restrictor size installed in the alarm line drain is correct. If it's not, replace it with the correct size according to the trim drawing.
J
Joshua HebertAug 28, 2025
Why is the Victaulic Control Unit system water pressure gauge fluctuating?
- M
  Marie ReidAug 28, 2025
  If the system water pressure gauge on your Victaulic Control Unit is fluctuating with the supply pressure, it's likely that the check valve in the bypass line is installed backward or there is debris present in the bypass check valve. Check the orientation of the bypass check valve, ensuring the arrow points from the supply side to the system side. Also, remove the threaded cap from the check valve to clear any debris and ensure the clapper moves freely.
B
Brian HintonAug 31, 2025
How to fix a Victaulic FireLock 751 leaking from the intermediate chamber?
- D
  David PetersonSep 1, 2025
  If water is leaking from the intermediate chamber of your Victaulic Control Unit, it suggests that water is getting past the seal. Inspect the clapper seal and seat for any physical damage, and make sure they are free from debris. Also, verify that there is no vacuum in the alarm line. If a vacuum exists, install a Series 752V Retard Vent Kit or create an air break in the alarm line.
C
Christopher KingSep 4, 2025
What to do if water is leaking from the intermediate chamber of Victaulic Control Unit?
- K
  Kelly MartinezSep 4, 2025
  If the water is leaking from the intermediate chamber of your Victaulic Control Unit, it could be due to several reasons. First, inspect the clapper seal and seat for any physical damage or debris. Also, make sure there isn't a vacuum in the alarm line; if there is, install a Series 752V Retard Vent Kit or create an air break. Second, ensure that any downstream flow from the valve is shut off. Finally, verify that the bypass line is correctly installed or that the excess pressure pump is properly set up to create a differential across the valve.
C
Catherine KingSep 7, 2025
Why is the water pressure gauge fluctuating on my Victaulic FireLock 751?
- N
  Nathan SantosSep 7, 2025
  If the system water pressure gauge on your Victaulic Control Unit is fluctuating with the supply pressure, it could be due to the check valve in the bypass line being installed backward. Ensure the arrow on the bypass check valve points from the supply side to the system side. Another potential cause is debris in the bypass check valve. Remove the threaded cap to the check valve and clear any debris, making sure the clapper can move freely.
A
Anita PriceSep 12, 2025
How to fix a weak ringing water motor gong on Victaulic FireLock 751?
- A
  amyhernandezSep 12, 2025
  If the water motor gong on your Victaulic Control Unit isn't ringing or is ringing weakly, there are a few things to check. First, make sure the holes in the valve body seat ring aren't blocked and that the orifice from the intermediate chamber to the alarm line is clear. Second, verify that check valves are isolating each valve's alarm line in the system, preventing water from leaking out of another valve's alarm line drain. Lastly, confirm that the correct restrictor size is installed in the alarm line drain; if it's incorrect, replace it with the right size according to the trim drawing.

Victaulic FireLock 751 Series Specifications

General

Brand	Victaulic
Model	FireLock 751 Series
Category	Control Unit
Language	English

Summary

Series 751 FireLock European Alarm Check Valve Stations

General Safety and Product Information

Introduction to the product, key safety warnings, and installer requirements.

Initial System Setup

System Preparation and Filling

Steps for draining, depressurizing, filling, and removing air from the system.

Alarm Line Valve Operation and Finalization

Opening alarm valves, confirming positions, and notifying authorities.

Required Water Flow Alarm Test

Test Execution and Verification

Procedure for performing the test, confirming alarm activation, and checking system reset.

Test Completion and Reporting

Steps to check valve positions, perform final checks, and notify authorities.

Installer Safety and Hazard Identification

Installer Safety Guidelines

Key safety rules for installers including PPE and system depressurization.

Hazard Level Definitions

Definitions of WARNING, CAUTION, and NOTICE symbols for safety.

Installation and Testing Prerequisites

Important Installation Guidelines

Guidelines for space, flushing, protection, compatibility, and water supply.

Hydrostatic Testing and Shipment Handling

Testing pressures and guidelines for receiving and inspecting shipments.

European Trim Dimensions: VDS, CE, UKCA, FM, EAC

Dimensional and Weight Data

Table of dimensions and weight for the VDS, CE, UKCA, FM, EAC trim version.

European Trim Dimensions: LPCB Version

Dimensional and Weight Data

Table of dimensions and weight for the LPCB trim version.

European Trim Dimensions: FG Version

Dimensional and Weight Data

Table of dimensions and weight for the FG trim version.

European Trim Dimensions: SBSC Version

Dimensional and Weight Data

Table of dimensions and weight for the SBSC trim version.

Trim Components Exploded View

Component Identification and Listing

Diagram and table listing standard and optional trim components.

Internal Valve Components

Section and Exploded View Diagrams

Diagrams and lists of internal valve parts for various sizes.

Initial System Setup

System Filling and Air Removal

Steps to drain, depressurize, fill the system, and remove trapped air.

Alarm Valve Operation and Finalization

Opening alarm valves, confirming positions, and notifying authorities.

Resetting the System

System Reset Procedure

Steps to close supply valve, drain, and follow initial setup for reset.

Inspection and Testing Requirements

Routine Inspection Procedures

Guidelines for daily, weekly, and monthly inspections, including pressure checks.

Annual Inspection Tasks

Annual inspection involves main drain test and internal valve inspection.

Required Main Drain Test

Main Drain Test Execution and Recording

Steps to perform the test, record pressures, and compare residual readings.

Test Completion and System Return

Steps for resetting valves and notifying authorities after the test.

Required Water Flow Alarm Test

Water Flow Alarm Test Execution

Procedure for executing the test, verifying alarm functions, and performing post-test checks.

Test Conclusion and System Re-entry

Confirm final valve positions and notify authorities of system return.

Required Internal Inspection

Internal Inspection Preparation and Component Inspection

Steps for system preparation, cover removal, and inspection of internal parts.

Internal Inspection Reassembly and System Reset

Re-installing the cover plate and returning the system to service.

Removing and Replacing the Clapper Seal

Clapper Seal Removal Steps

Steps to remove the seal retaining ring and pry out the old clapper seal.

Seal Washer Extraction and Replacement (8-inch;DN200)

Specific steps for the 8-inch/DN200 size to remove and replace the seal washer.

Clapper Seal Installation and Screw Torque

Installing the new seal and tightening the self-sealing screw to specified torque.

Removing and Replacing the Clapper Assembly

Clapper Assembly Removal and Cleaning

Steps to remove clapper shaft, bushings, and the clapper assembly, cleaning components.

Clapper Assembly Installation and Reassembly

Installing the new clapper assembly, shaft, spring, and re-installing the cover plate.

Installing the Cover Plate Gasket and Cover Plate

Cover Plate Gasket and Bolt Torque Specifications

Guidelines for gasket inspection, alignment, and proper torque for cover plate bolts.

Troubleshooting System Issues

Pressure Fluctuations and Leakage Diagnosis

Diagnosing and resolving issues like fluctuating pressure and intermediate chamber leaks.

Alarm Ringing Issues and Water Motor Diagnosis

Troubleshooting weak or no alarm ringing and identifying water motor issues.

Contact Information and Product Approvals

Victaulic Company Contact Details

Company contact information, address, phone, and fax numbers.

Product Approval Numbers and Listings

Listing of product approval numbers and VdS certifications for various sizes.

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Victaulic FireLock 751 Series - User Manual

Other manuals for Victaulic FireLock 751 Series

Questions and Answers

Victaulic FireLock 751 Series Specifications

Summary

Series 751 FireLock European Alarm Check Valve Stations

General Safety and Product Information

Initial System Setup

System Preparation and Filling

Alarm Line Valve Operation and Finalization

Required Water Flow Alarm Test

Test Execution and Verification

Test Completion and Reporting

Installer Safety and Hazard Identification

Installer Safety Guidelines

Hazard Level Definitions

Installation and Testing Prerequisites

Important Installation Guidelines

Hydrostatic Testing and Shipment Handling

European Trim Dimensions: VDS, CE, UKCA, FM, EAC

Dimensional and Weight Data

European Trim Dimensions: LPCB Version

Dimensional and Weight Data

European Trim Dimensions: FG Version

Dimensional and Weight Data

European Trim Dimensions: SBSC Version

Dimensional and Weight Data

Trim Components Exploded View

Component Identification and Listing

Internal Valve Components

Section and Exploded View Diagrams

Initial System Setup

System Filling and Air Removal

Alarm Valve Operation and Finalization

Resetting the System

System Reset Procedure

Inspection and Testing Requirements

Routine Inspection Procedures

Annual Inspection Tasks

Required Main Drain Test

Main Drain Test Execution and Recording

Test Completion and System Return

Required Water Flow Alarm Test

Water Flow Alarm Test Execution

Test Conclusion and System Re-entry

Required Internal Inspection

Internal Inspection Preparation and Component Inspection

Internal Inspection Reassembly and System Reset

Removing and Replacing the Clapper Seal

Clapper Seal Removal Steps

Seal Washer Extraction and Replacement (8-inch;DN200)

Clapper Seal Installation and Screw Torque

Removing and Replacing the Clapper Assembly

Clapper Assembly Removal and Cleaning

Clapper Assembly Installation and Reassembly

Installing the Cover Plate Gasket and Cover Plate

Cover Plate Gasket and Bolt Torque Specifications

Troubleshooting System Issues

Pressure Fluctuations and Leakage Diagnosis

Alarm Ringing Issues and Water Motor Diagnosis

Contact Information and Product Approvals

Victaulic Company Contact Details

Product Approval Numbers and Listings

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