PLACING THE SYSTEM IN SERVICE
CAUTION
• The Series 751 FireLock Alarm Check Valve and supply piping
must be protected from freezing temperatures and mechanical
damage.
• For proper operation of alarms in a wet system, it is important to
remove all air from the system. Auxiliary drains may be required
to release all trapped air from the system.
Failure to follow these instructions could cause improper valve
operation, resulting in personal injury and/or property damage.
NOTICE
• The callouts in the following photos correspond with the
"Exploded View Drawing – Trim Components" section.
1. Open the system main drain valve (8). Confirm that the system is
drained.
2. Close the system main drain valve (8).
3. Confirm that system drains are shut and the system is free of
leaks.
3a. Confirm that the system has been depressurized. The gauges
should indicate zero pressure.
4. Open the remote system test valve (inspector's test connection)
and any auxiliary drains to remove all air from the system.
5. Close the alarm line ball valve (11) to prevent alarms from operat-
ing while the system is filling. Alarm and electrical panels (con-
trolled by an alarm flow switch on the riser) cannot be interrupted.
NOTE: If alarm activation is possible, notify local fire companies
that the system is being serviced.
CAUTION
• Take precautions when opening the water supply main control
valve because water will flow from all open system valves.
Failure to follow this instruction could result in property damage.
3
6. Open the water supply main control valve (3) slowly.
7. Allow the system to fill with water completely. Allow water to flow
from the remote system test valve (inspector's test connection) and
any auxiliary drains until all trapped air is removed from the sys-
tem.
8. After a steady flow of water is established and all air is released
from the system, close the remote system test valve (inspector's
test connection) and any auxiliary drains in the system.
9. Record the system pressures. The system pressure gauge (14)
should be equal to or greater than the water supply pressure gauge
(5).
I-751.VDS / Series 751 FireLock
™
European Alarm Check Valve Stations / Installation, Maintenance, and Testing Manual
I-751.VDS_7REV_F
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