Victaulic FireLock NXT 776 Series User Manual

EXTERNALINSPECTION
WARNING
Thebuildingownerortheirrepresentativeisresponsiblefor•
maintaining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accor-
dancewiththerequirementsof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mustbeincreasedinthepres-•
enceofcontaminatedwatersupplies,corrosive/scalingwater
supplies,andcorrosiveatmospheres.
Depressurizeanddrainthepipingsystembeforeattemptingto•
install,remove,adjust,ormaintainanyVictaulicproducts.
Failuretofollowtheseinstructionscouldcausesystemfailure,
resultingindeath,seriouspersonalinjury,andpropertydamage.
NOTICE
Anyactivitiesthatrequiretakingthevalveoutofservicemay•
eliminatethefireprotectionprovided.
Considerationofafirepatrolshouldbegivenfortheaffected•
areas.
Beforeservicingortestingthesystem,notifytheauthority•
havingjurisdiction.
WEEKLYINSPECTION
1. Perform a visual inspection on the valve and trim on a weekly
basis. NOTE: If the deluge system is equipped with a low-pressure
alarm, monthly inspections may be sufficient. Contact the local
authority having jurisdiction for specific requirements.
MONTHLYINSPECTION
1. Record the system air pressure and water supply pressure.
Confirm that the water supply pressure is within the range of
normal pressures observed in the area. Significant loss of water
supply pressure could indicate an adverse condition in the water
supply. Confirm the proper water-to-air ratio is being maintained.
2. Confirm that there is no leakage from the intermediate valve
chamber. The drip check in the alarm line should not be leaking
water or air.
3. Inspect the valve and trim for mechanical damage and corrosion.
Replace any damaged or corroded parts.
4. Confirm that the deluge valve and trim are located in an area that
is not subject to freezing temperatures.
5. Confirm that all valves are in their normal operating positions (refer
to the table below).
Valve
NormalOperating
Position
Diaphragm-Charge-Line Ball Valve Open
Alarm Test Ball Valve Closed
Water Supply Main Control Valve Open
Water Supply Main Drain Valve Closed
System Main Drain Valve Closed
Alarm Line Ball Valve (VdS Trim Only) Open
Slow-Fill Ball Valve of the Victaulic AMTA (if applicable) Open
Fast-Fill Ball Valve of the Victaulic AMTA (if applicable) Closed
Water Motor Alarm Shutoff Valve (VdS Trim Only) Open
I-769D_23
FireLockNXT™DelugeValve
SERIES 769
I-769DINSTALLATION,MAINTENANCE,ANDTESTINGMANUAL
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VICTAULIC IS A REGISTERED TRADEMARK OF VICTAULIC COMPANY. © 2007 VICTAULIC COMPANY. ALL RIGHTS RESERVED. PRINTED IN THE USA.
REV_D

Victaulic FireLock NXT 776 Series Specifications

General

Brand	Victaulic
Model	FireLock NXT 776 Series
Category	Control Unit
Language	English