Victaulic FireLock NXT 769 Series Installation, Maintenance, And Testing Manual

MAINTENANCE
The following sections instruct on how to remove and replace internal
valve components. Care must be taken to avoid damage to parts during
removal and installation.
WARNING
• Depressurizeanddrainthepipingsystem
beforeattemptingtoremovethecoverplate
fromthevalve.
Failuretofollowthisinstructioncouldresult
inseriouspersonalinjuryand/orproperty
damage.
CAUTION
• Anyactivitiesthatrequiretakingthe
valveoutofservicemayeliminatethefire
protectionprovided.
• Beforeservicingortestingthesystem,
notifytheauthorityhavingjurisdiction.
• Considerationofafirepatrolshouldbe
givenintheaffectedareas.
Failuretofollowtheseinstructionscould
resultinseriouspersonalinjuryand/orprop-
ertydamage.
REMOVINGANDREPLACINGTHECLAPPERSEAL
1. Perform steps 1 – 13 of the “Required Internal Inspection” section.
2. Remove the seal assembly bolt/bolt seal from the clapper seal.
3. Remove the seal-retaining ring.
CAUTION
• DONOTprythesealwasheroutoftheclappersealfromthe
innerhole.
Failuretofollowthisinstructioncoulddamagethesealwasher,
resultinginimproperclappersealingandvalveleakage.
4. Pry the edge of the seal washer from inside the clapper seal, as
shown above. DONOTPRYTHESEALWASHEROUTFROM
THEINNERHOLE.
5. Remove the seal washer from the clapper seal. Dry up any
moisture that is under the seal washer and on the clapper seal.
CAUTION
• UseonlyVictaulic-suppliedreplacementparts.
Failuretofollowthisinstructioncouldcauseimpropervalve
operation,resultinginpropertydamage.
REV_B
FireLockNXT™AutoConvertPreactionValve
SERIES 769
PreactionElectricAutoConvertDryTrim
I-769P.AC/ELECINSTALLATION,MAINTENANCE,ANDTESTINGMANUAL
www.victaulic.com
VICTAULIC IS A REGISTERED TRADEMARK OF VICTAULIC COMPANY. © 2009 VICTAULIC COMPANY. ALL RIGHTS RESERVED. PRINTED IN THE USA.
I-769P.AC/ELEC_41

Victaulic FireLock NXT 769 Series Specifications

General

Brand	Victaulic
Model	FireLock NXT 769 Series
Category	Control Unit
Language	English