I-768N
/ Series 768N FireLock NXT
™
Dry Valve
/ Installation, Maintenance, and Testing Manual
Water Supply
Main Drain
Valve (Steps
10 & 12)
Water Supply
Main Control
Valve
(Steps 11 & 13)
INITIAL SYSTEM SETUP (CONTINUED)
Step 10:
Open the water supply main drain valve.
Step 11:
Open the water supply main control valve slowly until water flows
steadily from the open water supply main drain valve.
Step 12:
Close the water supply main drain valve when a steady flow of water
occurs.
Step 13:
Open the water supply main control valve fully.
Step 14:
Confirm that all valves are in their normal operating positions (refer to
the table to the right).
Step 15:
Notify the authority having jurisdiction, remote station alarm monitors,
and those in the affected area that the system is in service.
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
Isolation Ball Valve for Series 746-LPA Dry Accelerator
(if applicable)
Open
1/4-Turn Vent Ball Valve for Series 746-LPA Dry Accelerator
(if applicable)
Closed
Slow-Fill Ball Valve of the Victaulic AMTA (if applicable)
Open
Fast-Fill Ball Valve of the Victaulic AMTA (if applicable)
Closed
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.
I-768N_13
REV_C
