System Sensor WFD Series Installation And Maintenance Instructions page 4

Figure 5A. Ground screw location:
Figure 5B. Knockout plug removal:
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 in Chapter 5 of
NFPA Standard 13A.
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 reduce waterflow detector
service life to 4 or 5 years.
System Sensor warrants its enclosed waterflow detector to be free from de-
fects 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 pe-
riod commencing with the date of manufacture. After phoning System
Sensor's toll free number 800-SENSOR2 (736-7672) for a Return Authori-
zation number, send defective units postage prepaid to: System Sensor,
D770-01-00
Technical Manuals Online! - http://www.tech-man.com
Figure 6. Delay adjustment dial:
GROUND
SCREW
(GREEN)
MOUNTING
PLATE
Delay adjustment dial
A78-2063-00
A78-1914-03
WARNING
The Limitations of Waterflow Alarm Devices
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 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.
Three-Year Limited Warranty
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, unreasonable
use, modifications, or alterations occurring after the date of manufacture.
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 negli-
gence or fault. Some states do not allow the exclusion or limitation of inci-
dental 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.
4
Table of dial settings
ER
2
3
30 45
0
Dial setting 2
0 1
Seconds (±50%) 30
0 15
embossed here.
See below.
3 4 5
55
45 70
A78-1496-05
I56-459-11
© 2000 System Sensor