System Sensor WFDTNRN Installation And Maintenance Instructions

INSTALLATION AND MAINTENANCE INSTRUCTIONS
WFDTNRN Vane-type Waterflow Detector
SPECIFICATIONS
Contact Ratings:
Triggering Threshold Bandwidth (Flow Rate): 4 to 10 GPM
Static Pressure Rating:
Dimensions (Installed):
Operating Temperature Range:
Shipping Weight:
Enclosure Rating:
U. S. Patent Number:
IMPORTANT
Please Read Carefully And Save
This instruction manual contains important information about the installation
and operation of waterflow detectors. Purchasers who install waterflow detec-
tors for use by others must leave this manual or a copy of it with the user.
Read all instructions carefully before beginning.
The model WFDTNRN is a vane-type waterflow detector for use in wet-pipe
fire sprinkler systems only. Vane-type waterflow detectors shall not be used as
the sole initiating device in both deluge and preaction systems; waterflow de-
tectors used in these types of systems may result in an unintended discharge
caused by a surge, trapped air or a short retard time.
Installation must be performed by qualified personnel and in accordance with
all national and local codes and ordinances.
Shock hazard: Disconnect power source before servicing. Serious injury or
death could result.
Risk of explosion: Not for use in hazardous locations. Serious injury or death
could result.
PRINCIPLES OF OPERATION
Vane-type waterflow detectors mount to water filled pipes in fire sprinkler sys-
tems. Waterflow in the pipe deflects a vane. Deflection of the vane produces
a switched output. All detectors will activate on a sustained flow of water
greater than 10 gallons per minute (gpm) but will not activate if the flow rate
is less than 4 gpm.
COMPATIBLE PIPE TEES/RISERS
Model WFDTNRN is supplied with 12 paddles. One paddle is provided for
each size of the threaded, sweat or plastic tee. See Figure 1 and approximate
tee depth chart. Each paddle has an indication that shows the pipe size and
type of tee to be used with.
APPROXIMATE TEE DEPTH REQUIREMENTS (SEE FIGURE 1)
Tee Depth Threaded Sweat
1 × 1 × 1" 2 1 / " 1 3 / "
8 4
1 1 / × 1 1 / × 1" 2 1 / " 2 1 / "
4 4 2 8
1 1 / × 1 1 / × 1" 2 3 / " 2 1 / "
2 2 4 4
2 × 2 × 1" 3 1 / " 2 3 / "
4 4
10 A @ 125/250 VAC
250 PSI (Max.)
4in H x 3½ in W x 6¾ in D
32°F to 150°F (0°C to 66°C)
2 lbs
NEMA 4
5,213,205
CAUTION
WARNING
CPVC NIBCO/ CPVC
SPEARS SPEARS CPVC/Tyco
(no insert) (with insert)
2 1 / " 2 15 / " 2
8 32
N/A N/A
3" 3"
N/A N/A
; 2.5 A @ 24 VDC
FIGURE 1. MOUNTING DIMENSIONS
2-5/8"
4"
ADAPTER
TEE DEPTH
DESIGNED TO FIT WITHIN 2 X 4 STUD WALL CONSTRUCTION
INSTALLATION GUIDELINES
Before installing any waterflow alarm device, be thoroughly familiar with:
NFPA 72: Installation, Maintenance and Use of Local Protective Signalling
Systems
NFPA 13: Installation of Sprinkler Systems, specifically Section 3.17
NFPA 25: Inspection, Testing and Maintenance of Sprinkler Systems, specifi-
cally Chapters 4 and 5, and Section 5.3.3.2
NFPA 13D: Standard for Residential Dwellings
NFPA 13R: Standard for Multifamily Dwellings
FIGURE 2. ASSEMBLY DIAGRAM
COVER
TIMER
ASSEMBLY
13 / " (P/N FS-RT)
16
N/A
N/A
N/A
GASKET
FLOW
ACTUATOR
LEVER
WATERFLOW
1
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
3-1/2"
TEE
INSTALLATION GAUGE
END OF PADDLE TREE MUST
FIT BETWEEN TOP OF TEE
AND BOTTOM OF FLANGE
TEE FITTING
PLASTIC VANE
1" NPT
THREAD
W0390-00
TAMPER PROOF
WRENCH (P/N WFDW)
COVER TAMPER
SWITCH (OPTIONAL P/N CTS)
GROUND SCREW
MOUNTING
PLATE
PADDLE
FILISTER HEAD
SCREW
W0388-01
I56-4044-004
11-09