Victaulic 769N FireLock NXT Series User Manual

I-769N.Preaction/AC-ELEC / Victaulic
®
Series 769N FireLock NXT
™
/ Installation, Maintenance, and Testing Manual
Auto Vent
Sleeve of
Series 776
Low-Pressure
Actuator
(Step 5)
Alarm Test
Ball Valve
(Step 3)
Charge Line
Ball Valve
(Step 8)
Auto Drain
Sleeve
(Step 9)
INITIAL SYSTEM SETUP
NOTICE
Before proceeding with initial system setup, verify that the
following steps have been completed:
• Verify that the system air feed piping is connected to the
location indicated on the trim drawing.
• Verify that an approved control panel is installed for proper
system operation.
THE FOLLOWING INSTRUCTIONS APPLY TO SOLENOIDS THAT
ARE CLOSED (DE-ENERGIZED). IF THE SOLENOIDS ARE OPEN
(ENERGIZED), RESET THE CONTROL PANEL BEFORE ATTEMPTING
TO PLACE THE SYSTEM IN SERVICE.
Step 1:
Confirm that all system drains are shut and that the system is free of
leaks.
Step 2:
Confirm that the system has been depressurized. The gauges should
indicate zero pressure.
Step 2a: If a Series 746-LPA Dry Accelerator is installed, confirm
that the isolation ball valve is closed.
Step 2b: If a Series 746-LPA Dry Accelerator is installed, open
the ¼-turn vent ball valve.
Step 3:
Confirm that the alarm test ball valve is closed.
Step 4:
Charge the system with air by turning on the compressor or by opening
the fast-fill ball valve on the air maintenance trim assembly (AMTA).
Charge the system to 13 psi/90 kPa/0.9 Bar minimum. Refer to the “Air
Supply Requirements” section.
Step 5:
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.
Step 6:
When system air pressure is established, close the fast-fill ball valve on
the AMTA.
Step 7:
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.
Step 8:
Open the charge line ball valve. Allow water to flow through the auto
drain tube.
Step 9:
Open the manual pull station valve to bleed off any air that is present,
then close the manual pull station valve. Verify that the charge line
pressure is equal to the supply pressure and that the auto drain is set
by pulling up on the auto drain sleeve. Verify that no water is draining
from the Series 776 Low-Pressure Actuator or any solenoid actuators.
Step 9a: If a Series 746-LPA Dry Accelerator is installed, close
the ¼-turn vent ball valve.
Step 9b: If a Series 746-LPA Dry Accelerator is installed, open
the isolation ball valve. This will set the accelerator.
I-769N.Preaction/AC-ELEC_13REV_A

Victaulic 769N FireLock NXT Series Specifications

General

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