System Sensor WFDT Installation And Maintenance Instructions page 4

Operational Testing
Always notify a central station monitoring waterflow
alarms before repairing, maintaining 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 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 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 jurisdic-
tion for leaks. Test detectors at least quarterly as described
under Operational Testing above to insure proper opera-
tion. This device is not designed for use on "dry pipe"
systems. Test more often if required by the authority having
jurisdiction.
Under normal conditions System Sensor waterflow detec-
tors should provide years of trouble-free service. If, how-
1. Waterflow detectors may not work or operate properly
if sprinkler piping being monitored is plugged with pipe
scale, mud, stones or other foreign material. Sprinkler
systems should be checked regularly for such blocking
material, following the instructions in Chapter 5 of NFPA
Standard 13A.
2. Alarms generated by the activation of waterflow detec-
tors may not be received by a central station if telephone
or other communication lines to the detector are out of
service, disabled, or open.
3. Vane-type waterflow detectors have a normal service
Please refer to insert for the Limitations of Fire Alarm Systems
System Sensor warrants its enclosed waterflow detector to be free from
defects in materials and workmanship under normal use and service for a
period of three years from date of manufacture. System Sensor makes no
other express warranty for this waterflow detector. No agent, representa-
tive, dealer, or employee of the Company has the authority to increase or
alter the obligations or limitations of this Warranty. The Company's obliga-
tion of this Warranty shall be limited to the repair or replacement of any
part of the waterflow detector which is found to be defective in materials
or workmanship under normal use and service during the three year period
commencing with the date of manufacture. After phoning System Sensor's
toll free number 800-SENSOR2 (736-7672) for a Return Authorization
number, send defective units postage prepaid to: System Sensor, Return
N770-05-00
WARNING
The Limitations of Waterflow Alarm Devices
Three-Year Limited Warranty
4
ever, the delay mechanism becomes faulty, replacement
kits are available. To replace the delay mechanism, request
Part No. A3008-00; for switch enclosure, request Part No.
A77-01-02. Complete instructions are enclosed with each.
Either mechanism can be easily replaced without removing
the detector from the pipe or draining the pipe. If damage
occurs to paddle, order replacement kit PRK9. Refer to pro-
cedure 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 dis-
connect wiring.
3. Unscrew WFDT or WFDTH 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.
life of 10-15 years. Hard water systems, however, may
substantially reduce waterflow detector service life.
4. Waterflow detectors are not a substitute for insurance.
Building owners should always insure property and lives
being protected by sprinkler systems.
5. If valves controlling the water supply to a sprinkler sys-
tem are closed, vane-type waterflow detectors will not
work. All valves controlling a sprinkler water supply
should be sealed or locked in the normally open posi-
tion. The normally open position should be monitored
by a sprinkler supervisory switch.
Department, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174.
Please include a note describing the malfunction and suspected cause
of failure. The Company shall not be obligated to repair or replace units
which are found to be defective because of damage, unreasonable use,
modifications, or alterations occurring after the date of manufacture. In no
case shall the Company be liable for any consequential or incidental dam-
ages for breach of this or any other Warranty, expressed or implied what-
soever, even if the loss or damage is caused by the Company's negligence
or fault. Some states do not allow the exclusion or limitation of incidental
or consequential damages, so the above limitation or exclusion may not
apply to you. This Warranty gives you specific legal rights, and you may
also have other rights which vary from state to state.
CAUTION
I56-0480-012R
©
2005 System Sensor