System Sensor WFD European Models - Manual (Page 3)

D770-53-00 3 I56-2617-004R
OPERATIONAL TESTING
Always notify the central station monitoring waterflow alarms before repair-
ing, maintaining or testing waterflow alarm devices.
1. Replace the cover and tighten the security screws with the security
wrench. Store the wrench in a secure place.
2. Open the inspector’s test valve and time how long it takes for the detec-
tor to indicate a flow condition. The detector should remain activated un-
til the inspector’s test valve is closed. Air pockets in the sprinkler system
may increase the apparent time delay.
MAINTENANCE
To prevent accidental water damage, control valves should be shut tight and the
system completely drained before waterflow detectors are removed or replaced.
Inspect detectors monthly for leaks. If leaks are found, replace the detector.
Test detectors at least quarterly as described under Operational Testing above
to insure proper operation. Test more often as required by applicable codes
or standards.
Under normal conditions System Sensor waterflow detectors should provide
years of trouble-free service. If any part of the detector does not perform prop-
erly, replace the entire detector. Failure to follow this instruction may result in
failure of the detector to report a waterflow condition.
Proceed as follows to remove a detector:
1. Drain the pipe.
2. Turn off electrical power to the detector, and then disconnect wiring.
3. Loosen nuts and remove U bolts.
4. Gently lift the saddle far enough to get your fingers under it. With your
fingers, roll the vane so it will fit through the hole while continuing to lift
the waterflow detector saddle.
5. Lift detector clear of pipe.
CAUTION
If a vane breaks off in a pipe, find and remove it. Failure to do so may
restrict the proper flow of water to part of the sprinkler system.
FIGURE 5. ASSEMBLY DIAGRAM:
TAMPER
PROOF
WRENCH
COVER
DELAY
MECHANISM ELECTRICAL
CONDUIT
ENTRANCE
TERMINAL
BLOCK
MOUNTING
PLATE
PIPE SADDLE
PLASTIC VANE
ROLL PADDLE
OPPOSITE OF
FLOW ARROW
WHILE INSERTING
SADDLE GASKET
WA
TERFLOW
REFER TO
TABLE 2
U-BOLT
PIPE
U-BOLT NUT
W0101-02
FIGURE 6. GROUND SCREW LOCATION:
GROUND
SCREW
(GREEN)
MOUNTING
PLATE
W0103-00