System Sensor LFD Models - Manual (Page 4)

D770-30-00 4 I56-1620-002R
© 2001 System Sensor
Three-Year Limited Warranty
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 obli-
gation 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 peri-
od 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, Repair 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, unrea-
sonable use, modifications, or alterations occurring after the date of man-
ufacture. In no case shall the Company be liable for any consequential or
incidental damages for breach of this or any other Warranty, expressed or
implied whatsoever, 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.
1. Waterflow detectors may not work or operate properly if sprinkler pip-
ing 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 of NFPA Standard 13
and NFPA 750.
2. Alarms generated by the activation of waterflow detectors 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 life of 10-15
years. Hard water systems, however, may substantially reduce water-
The Limitations of Waterflow Alarm Devices
WARNING
flow detector service life.
4. Waterflow detectors are not a substitute for insurance. Building own-
ers should always insure property and lives being protected by sprin-
kler systems.
5. If valves controlling the water supply to a sprinkler system 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
position. The normally open position should be monitored by a sprin-
kler supervisory switch.
Figure 11. Solid State Retard Timing Chart:
Figure 10A. Ground screw location:
Figure 10B. Knockout plug removal:
CAUTION: Only use the above timer settings.
Timing must not exceed 90 seconds.
GROUND
SCREW
(GREEN)
MOUNTING
PLATE
Switch 1 Switch 2 Switch 3
Time (sec) (60 sec) (30 sec) (15 sec)
0 OFF OFF OFF
15 OFF OFF ON
30 OFF ON OFF
45 OFF ON ON
60 ON OFF OFF
75 ON OFF ON
90 ON ON OFF
ON 1 2 3
A78-1914-05
A78-1914-04
Figure 9. Assembly diagram:
Please refer to insert for the Limitations of Fire Alarm Systems