FIGURE 3.
GROUND
GROUND
SCREW
SCREW
W0383-01
MECHANICAL DELAY ADJUSTMENT
The pneumatic delay is preset at approximately 30 seconds at the factory. To adjust the
delay, turn the adjustment dial on the delay mechanism. Turn clockwise to increase
the delay, counterclockwise to decrease the delay. Delay can be adjusted over a range
from 0-90 seconds maximum. See Figure 4. As a point of reference 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 approximate 60 second time
delay.
NOTE: Set the delay to the minimum required to prevent false alarms due to flow
surges.
After extended service, parts of the detector may become worn reducing the time de-
lay and causing false alarms. If this happens, increase the delay. If the delay is already
at maximum, replace the mechanical delay assembly. Refer to Maintenance section
for ordering replacement parts.
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 security 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 time delay.
FIGURE 4. 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
MAINTENANCE
To prevent accidental water damage, control valves should be shut tightly and the
system 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 leaks occur. Test detectors
at least quarterly as described under Operational Testing to insure 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 mechanisms, request Part No. FS-RT. Complete
instructions are enclosed with replacement parts. The delay mechanism can be easily
replaced without removing the detector from the pipe or draining the pipe. If damage
occurs to paddle, order replacement kit, request Part No. PRK9. Refer to procedure
below for removal of detector on pipe. Do not repair or replace any other waterflow
detector components in the field. If any other part of the detector does not perform
properly, 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. Unscrew WFDTN from tee fitting.
4. Lift detector clear of pipe.
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. DIRECTIONAL COVER
NOTCHED COVER INDICATES FLOW DIRECTION AT A
DISTANCE FROM MULTIPLE VIEWING ANGLES
W0382-00
CAUTION
3
I56-4043-D
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