Series 756 FireLock
®
European Dry Valve Stations
17
4.
Partially open the system main-drain valve (4) slowly. Con-
firm that no water is flowing from the drain.
NOTE:
If water is
flowing, the system may not have drained properly. If this is the
case, follow all steps under the “Placing the System in Service”
section, starting on page 11.
5.
Record the system air pressure at which the low-air alarm
activates.
6.
Close the system main-drain valve (4).
7.
Open the fast-fill ball valve on the air maintenance device
(28). Bring the pressure back up to normal system pressure.
8.
When the proper pressure is established, close the fast-fill
ball valve on the air maintenance device (28).
9.
Open the slow-fill ball valve on the air maintenance device
(28).
10.
If a Series 746 Dry Accelerator is used, open the
1
/
4
-turn
vent ball valve on the accelerator (14).
10a.
Open the isolation ball valve on the Series 746 Dry Accel-
erator (14).
4
4
28
28
28
14
14
