Victaulic FireLock NXT 768 Series User Manual

11. When the system reaches approximately 10 psi/69 kPa/0.7 Bar,
and no additional moisture is being released from the Auto Vent,
pull up on the Auto Vent Sleeve of the Series 776 Low-Pressure
Actuator. NOTE: The Auto Vent Screw should seal and remain in
the set (“UP”) position.
12. When system air pressure is established, close the fast-fill ball
valve on the AMTA.
13. Open the slow-fill ball valve on the AMTA. NOTE: Failure to leave
the slow-fill ball valve open may allow system pressure to drop,
resulting in valve operation in the event of a system leak.
14. Open the diaphragm-charge-line ball valve. Allow water to flow
through the Auto Drain tube.
15. 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.
16. 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.
16a. 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.
I-768_15
FireLockNXT™DryValve
SERIES768
I-768INSTALLATION,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 768 Series Specifications

General

Brand	Victaulic
Model	FireLock NXT 768 Series
Category	Control Unit
Language	English