MECHANICAL DELAY ADJUSTMENT
The pneumatic delay is preset at the factory to 30 seconds. To adjust the setting, turn
the adjustment dial clockwise to increase the delay, counterclockwise to decrease it.
The delay is adjustable from 0 to 90 seconds max. See Figure 5. As a point of refer-
ence when setting time delay in dark environments the notch in the dial indicates an
approximate 30 second time delay and the larger of the three tabs indicates an ap-
proximate 60 second time delay.
NOTE: Set the delay to the minimum required to prevent false alarms from flow
surges.
Periodically test time delay as required by Authority Having Jurisdiction or code au-
thority.
OPERATIONAL TESTING
Always notify a central station monitoring waterflow alarms before repairing, main-
taining, or testing waterflow alarm devices.
1. Replace the cover and tighten the tamper proof screws with the tamper proof
wrench. Store the wrench in a secure place.
2. Open the inspector’s test valve and time how long it takes for the detector to
indicate a flow condition. The detector should remain activated until the inspec-
tor’s test valve is closed. Air pockets in the sprinkler system may increase the
apparent delay.
MAINTENANCE
To prevent accidental water damage, control valves should be shut tight and the sys-
tem completely drained before waterflow detectors are removed or replaced.
Inspect detectors in accordance with applicable NFPA codes and standards and/or the
Authority Having Jurisdiction for leaks and replace if a leak occurs. Test detectors at
least quarterly, as described under Operational Testing, to ensure proper operation.
Test more often if required by the authority having jurisdiction.
Under normal conditions, Safe Signal waterflow detectors should provide years of
trouble-free service. However, if the delay mechanism becomes faulty, a replacement
kit is available. To replace the delay mechanism, request Part No. FS-RT. Complete
instructions are enclosed with replacement parts. The mechanism can be easily re-
placed without removing the detector from the pipe or draining the pipe. Do not
repair or replace any other waterflow detector components. If any other part of the
detector does not perform properly, replace the entire detector. Installation methods
other than those listed in this installation manual may prevent the device from re-
porting the flow of water in the event the associated sprinkler system is activated by
a fire. Safe Signal is not responsible for devices that have been improperly installed,
tested, or maintained.
To remove a detector:
1. Drain the pipe.
2. Turn off electrical power to the detector and disconnect the wiring.
3. Loosen the nuts and remove the U-bolts.
4. Gently lift the saddle far enough to get your fingers under it. Then, roll the vane
so it will fit through the hole while continuing to lift the waterflow detector
saddle.
5. Lift the detector clear of the pipe.
CAUTION
If a vane breaks in a pipe, find and remove it. If it is not removed, the vane may restrict
the flow of water to all or part of the fire sprinkler system.
FIGURE 4. KNOCKOUT PLUG REMOVAL
GROUND
GROUND
SCREW
SCREW
W0383-01
FIGURE 5. DELAY ADJUSTMENT DIAL:
NOTE: RETARD TIME MAY EXCEED 90 SECONDS. ADJUST
AND VERIFY THAT TIME DOES NOT EXCEED 90 SECONDS.
NUMBER ON DIAL IS APPROXIMATE TIME DELAY IN SECONDS
DELAY
ADJUSTMENT
DIAL
W0385-00
3
I56-4045-E
4/21
