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Victaulic FireLock NXT 776 Series - User Manual

Victaulic FireLock NXT 776 Series
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HANG THESE INSTRUCTIONS ON THE
INSTALLED VALVE FOR EASY FUTURE REFERENCE
WARNING
• Failuretofollowinstructionsandwarningscancauseproduct
failure,resultinginseriouspersonalinjuryandpropertydamage.
• Readandunderstandallinstructionsbeforeattemptingto
installanyVictaulicpipingproducts.
• Wearsafetyglasses,hardhat,andfootprotection.
• Savethisinstallation,maintenance,andtestingmanualfor
futurereference.
Ifyouneedadditionalcopiesofanyliterature,orifyouhaveany
questionsconcerningthesafeinstallationandoperationofthis
product,contactVictaulic,P.O.Box31,Easton,PA18044-0031,
USA,Telephone:1-800PICKVIC,e-mail:pickvic@victaulic.com.
WARNING
FireLockNXT™DelugeValve
SERIES 769
PNEUMATIC(DRYPILOT)RELEASEWITHSERIES776LOW-PRESSUREACTUATOR
HYDRAULIC(WETPILOT)RELEASE
ELECTRICRELEASEWITHSERIES753-ESOLENOIDVALVE
I-769DINSTALLATION,MAINTENANCE,ANDTESTINGMANUAL
www.victaulic.com
VICTAULIC IS A REGISTERED TRADEMARK OF VICTAULIC COMPANY. © 2007 VICTAULIC COMPANY. ALL RIGHTS RESERVED. PRINTED IN THE USA.
REV_D

Table of Contents

Questions and Answers

  • E
    Elizabeth BrooksAug 11, 2025
    What to do if Victaulic Control Unit Series 776 Low-Pressure Actuator is leaking?
    • C
      Cameron BatesAug 12, 2025
      If water leaks through the Series 776 Low-Pressure Actuator, first ensure the vent seal is set correctly and the air chamber is pressurized. Another cause may be a clogged strainer; in this case, replace the strainer screen. If the water leak persists after these steps, it could be due to a ripped diaphragm.
  • A
    Angel WelchAug 21, 2025
    Why the screw doesn't stay up on Auto Vent Sleeve of Victaulic FireLock NXT 776 Control Unit Series 776 Low-Pressure Actuator?
    • S
      Spencer PetersenAug 21, 2025
      If the screw on the Auto Vent Sleeve of your Series 776 Low-Pressure Actuator doesn't stay in the 'UP' position, it could be due to insufficient air pressure. Try increasing the air pressure going into the actuator. If the issue persists, it might indicate a broken seal.
  • S
    Stacy CunninghamAug 31, 2025
    How to fix no water passing through Victaulic Control Unit Series 776 Low-Pressure Actuator?
    • C
      Charles StoneAug 31, 2025
      If no water passes through the Series 776 Low-Pressure Actuator, the diaphragm charge line strainer might be clogged. Disassemble and clean this strainer to resolve the issue.

Victaulic FireLock NXT 776 Series Specifications

General IconGeneral
BrandVictaulic
ModelFireLock NXT 776 Series
CategoryControl Unit
LanguageEnglish

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