Victaulic 769N FireLock NXT Series User Manual

I-769N.Preaction/AC-ELEC / Victaulic
®
Series 769N FireLock NXT
™
/ Installation, Maintenance, and Testing Manual
REQUIRED WATER LEVEL AND LOW AIR ALARM
TESTS
Perform the water level and low air alarm tests on a frequency required
by the current NFPA-25 code or LPCB/EN guidelines. The authority
having jurisdiction in the area may require these tests on a more
frequent basis. Verify these requirements by contacting the authority
having jurisdiction in the affected area.
NOTICE
• If a Series 746-LPA Dry Accelerator is installed, ensure that the
authority having jurisdiction is notified that the water level and
low air alarm tests are in progress. Failure to close the isolation
ball valve of the Series 746-LPA Dry Accelerator may cause the
valve to trip, resulting in a false alarm.
1. Notify the authority having jurisdiction, remote station alarm
monitors, and those in the affected area that the water level and
low air alarm tests will be performed.
2. If a Series 746-LPA Dry Accelerator is installed, close the
isolation ball valve.
3. Open the water supply main drain valve fully to flush the water
supply of any contaminants.
4. Close the water supply main drain valve.
5. Close the water supply main control valve.
6. Partially open the system main drain valve slowly. Confirm that
water is not flowing from the drain. NOTE: If water is flowing from
the drain, the system may not have drained properly. In this case,
follow all steps in the “Resetting the System” section.
7. Record the system air pressure at which the low air alarm
activates.
8. Close the system main drain valve.
9. Close the slow-fill ball valve on the AMTA (if equipped).
10. Open the fast-fill ball valve on the AMTA. Bring the pressure back
up to the normal system pressure (if equipped).
11. When the normal system air pressure is reached, close the fast-fill
ball valve on the AMTA (if equipped).
12. Open the slow-fill ball valve on the AMTA (if equipped).
13. If a Series 746-LPA Dry Accelerator is installed, open the isolation
ball valve.
14. Open the water supply main drain valve.
CAUTION
• Take precautions when opening the water supply main control
valve, since water will flow from all open system valves.
Failure to follow this instruction could result in property damage.
15. Open the water supply main control valve slowly until water flows
steadily from the open water supply main drain valve.
16. Close the water supply main drain valve when a steady flow of
water occurs.
17. Open the water supply main control valve fully.
18. Confirm that all valves are in their normal operating positions (refer
to the table below).
Valve Normal Operating Position
Water Supply Main Control Valve Open
Water Supply Main Drain Valve Closed
System Main Drain Valve Closed
Charge Line Ball Valve of the Priming Manifold Assembly Open
Alarm Test Ball Valve of the Priming Manifold Assembly 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 applicable)
Closed
19. Notify the authority having jurisdiction, remote station alarm
monitors, and those in the affected area that the valve is back in
service. Provide test results to the authority having jurisdiction, if
required.
Water
Supply Main
Control
Valve
(Steps 5,
15, & 17)
Water Supply
Main Drain
Valve
(Steps 3, 4,
14, & 16)
System Main
Drain Valve
(Steps 4 & 8)
I-769N.Preaction/AC-ELEC_24 REV_A

Victaulic 769N FireLock NXT Series Specifications

General

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