10
9. Open the water supply main drain valve. This is the
drain located below the clapper.
10. Open the main water supply control valve slowly until
a steady flow of water is flowing from the open water sup-
ply drain valve.
11. Once a steady flow of water occurs, close the main
water supply drain valve slowly. Confirm that there is no
leakage from the ball drip, located in the alarm line’s pip-
ing. If water is flowing from the ball drip, close the main
water supply control valve and start over at step 1.
12. Fully open the main water supply control valve.
13. Record the system air pressure and the water supply
pressures.
14. Secure all valves in their normal operating positions.
15. Notify the authority having jurisdiction, remote station
monitors, and those in the affected area that the system is
in service.
SETTING UP THE SERIES 746 DRY ACCELERATOR
Refer to the installation and assembly instructions for the
Series 746 Dry Accelerator (I-746) to set up the accelerator.
• Opening the main control valve of the water supply will cause water to flow from all
open system openings.
Doing so may cause personal injury or property damage.
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