Victaulic FireLock NXT 776 Series - Page 37

7. Close the diaphragm-charge-line ball valve.
8. Open the system main drain valve to drain any water that has
accumulated and to release system air pressure.
NOTE: If the system has operated, open the remote system test valve
(inspector’s test connection) and any auxiliary drain valves.
9. FORPNEUMATIC(DRYPILOT)RELEASESYSTEMS: Close the
slow-fill ball valve on the AMTA.
WARNING
Makesurethevalveisdepressurizedand•
drainedcompletelybeforethecoverplate
boltsareremoved.
Thecoverplatecouldblowoffifthecover
plateboltsareremovedwhilethevalveis
pressurized,resultinginseriouspersonalinjury
and/orpropertydamage.
10. OPENTHEMANUALPULLSTATION.
11. After all pressure is released from the system, loosen the cover
plate bolts slowly. NOTE: DO NOT remove any cover plate bolts
until all cover plate bolts are loosened.
11a. Remove all cover plate bolts, along with the cover plate
and cover plate gasket. NOTE: The 1 ½-inch/48.3-mm
and 2-inch/60.3-mm valve sizes contain washers under
the heads of the cover plate bolts. Keep these washers for
re-installation.
12. Push the latch back (toward the diaphragm).
I-769D_35
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.
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