Victaulic FireLock NXT 769 Series Installation, Maintenance, And Testing 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 preaction 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.
Drip Check
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 preaction 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
Slow-Fill Ball Valve of the Victaulic AMTA (if applicable) Open
Fast-Fill Ball Valve of the Victaulic AMTA (if applicable) Closed
Isolation Ball Valve for Series 746-LPA Dry Accelerator (if
applicable)
Open
¼-Turn Vent Ball Valve for Series 746-LPA Dry Accelerator (if appli-
cable)
Closed
6. If a Series 746-LPA Dry Accelerator is installed, record the
pressure in the air chamber of the dry accelerator. The pressure
in the air chamber should equal the system air pressure within
the allowable tolerances of the gauges. If the air chamber’s pres-
sure is below the system air pressure, follow the “Troubleshooting”
section.
I-769P.AC/ELEC_26
FireLockNXT™AutoConvertPreactionValve
SERIES 769
PreactionElectricAutoConvertDryTrim
I-769P.AC/ELEC
INSTALLATION,MAINTENANCE,ANDTESTINGMANUAL
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REV_B

Victaulic FireLock NXT 769 Series Specifications

General

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