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

19. Open the manual pull station to bleed off any air that is present.
20. Close the manual pull station.
Auto Drain
Sleeve
21. Pull up on the Auto Drain Sleeve until the screw is in the set
(“UP”) position. Verify that there is pressure on the gauge to the
diaphragm charge line.
Diaphragm-Charge-
Line Ball Valve
22. When the diaphragm charge line is pressurized, temporarily close
the diaphragm-charge-line ball valve. Confirm that the diaphragm
charge line is maintaining pressure by observing the diaphragm-
charge-line pressure gauge.
22a. If pressure in the diaphragm charge line drops, the diaphragm
must be replaced and/or any leaks in the diaphragm charge line
must be corrected. Refer to the “Removing and Replacing the
Diaphragm Assembly” section.
Diaphragm-Charge-
Line Ball Valve
22b. If pressure in the diaphragm charge line does not drop, re-open
the diaphragm-charge-line ball valve, and proceed to the following
step.
Accelerator
¼-Turn Vent
Ball Valve
23. FORSYSTEMSINSTALLEDWITHASERIES746-LPADRY
ACCELERATOR: Close the ¼-turn vent ball valve on the
accelerator.
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_23

Victaulic FireLock NXT 769 Series Specifications

General

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