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

Water Supply Main
Control Valve
31. Open the water supply main control valve fully.
32. Record the system air pressure and the water supply pressure.
33. 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
34. Notify the authority having jurisdiction, remote station alarm moni-
tors, and those in the affected area that the system is in service.
ONAWEEKLYBASIS,WHENTHEVALVEISRESETAFTERAN
OPERATIONALTEST(ORAFTERANYSYSTEMOPERATION): The
main drain valve and any low-point drain valves should be partially
opened and then closed to drain water that might be present in the
riser. Continue this procedure until all water is released. NOTE:The
optional Series 75D Water Column Kit can be installed to automate this
step.
NOTICE
• Ifthemaindrainvalveisopenforaprolongedperiodoftime,
thesystemairpressuremaybeloweredtoapointwherethe
preactionvalvewilloperate.
REV_B
FireLockNXT™AutoConvertPreactionValve
SERIES 769
PreactionElectricAutoConvertDryTrim
I-769P.AC/ELEC
INSTALLATION,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_25

Victaulic FireLock NXT 769 Series Specifications

General

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