System Sensor WFDTNR User Manual
Wfdtnr vane-type waterflow detector, Installation and maintenance instructions
N770-06-00
1
I56-0509-009R
WFDTNR Vane-type Waterflow Detector
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
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.
CAUTION
Use vane-type waterflow detectors in wet-pipe systems only. DO NOT USE IN
DRY-PIPE, DELUGE, OR PRE-ACTION SYSTEMS. The sudden inrush of water
in such systems may break the vane off or damage the mechanism. Do not use
in potentially explosive atmospheres. Do not leave unused wires exposed.
pRINCIpLES OF OpERATION
Vane-type waterflow detectors mount to wet-pipe systems only. Water flow 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 WFDTNR fits 1- to 1
1
⁄
2
-inch NPT threaded ferrous and brass, 1- to
2-inch sweat brass, 1
1
⁄
2
-inch polybutylene plastic and 1-inch pvc plastic tees
having a 1-inch threaded NPT branch (see Figure 1 and chart for recom-
mended tee depths). For 2-inch cast and malleable threaded tees use 2-inch
paddle (P02-0023-00) provided. Use 1-inch CPVC paddle when installing de-
tector on 1-inch slip by 1-inch slip by 1-inch FPT NIBCO tee.
APPROXIMATE TEE DEPTH REQUIREMENTS (SEE FIGURE 1)
Tee Depth
Threaded
Sweat
Poly B CPVC
CPVC/Spears/
Victaulic
CPVC/Tyco
1 Ч 1 Ч 1˝
2
1
/
8
˝
1
3
/
4
˝
N/A
2
1
/
4
˝
2
15
/
32
˝
2
13
/
16
˝
1
1
/
4
Ч 1
1
/
4
Ч 1˝
2
1
/
2
˝
2
1
/
6
˝
N/A
N/A
N/A
N/A
1
1
/
2
Ч 1
1
/
2
Ч 1˝
2
3
/
4
˝
2
1
/
4
˝
2
1
/
2
˝
N/A
N/A
N/A
2 Ч 2 Ч 1˝
3
1
/
4
˝
2
3
/
4
˝
N/A
N/A
N/A
N/A
FIgURE 1. MOUNTINg DIMENSIONS:
3
1
/
4
˝
1
3
/
4
˝
3
1
/
4
˝
PIPE TEE FITTING
PLASTIC VANE
TEE DEPTH
REFER TO
TEE DEPTH
TABLE
INSTALLATION GAGE
END OF PADDLE TREE MUST
FIT BETWEEN TOP OF TEE
AND BOTTOM OF HEX TEE
ADAPTOR FLANGE
HEX TEE
ADAPTOR
W0124-00
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:
1˝ NPT THREAD
WATER FLOW
ACTUATOR
ASSEMBLY
FLOW
ACTUATOR
LEVER
TAMPER
PROOF
WRENCH
(P/N WFDW)
COVER
GROUND
SCREW
(GREEN)
MOUNTING
PLATE
PADDLE
FILLISTER
HEAD
SCREW
W0125-00
Other applicable NFPA standards, local codes and the requirements of the
authority having jurisdiction.
Failure to follow these directions may result in failure of the device to report
a waterflow condition. System Sensor is not responsible for devices that have
been improperly installed, tested or maintained.
1. Mount the detector where there is adequate clearance for installation and removal
and a clear view of it for inspection. See Figure 1 for mounting dimensions.
2. Locate to protect from damage, 6-7 feet above the floor.
3. On horizontal runs, position the detector on top of the pipe or on the
side. Do not mount it upside down.
4. Mount detector at least 6 inches from a fitting which changes the direc-
tion of the water flow.
5. BE SURE DIRECTION-OF-FLOW ARROW MATCHES ACTUAL DIREC-
TION OF FLOW IN THE PIPE.
MOUNTINg INSTRUCTIONS
1. This WFDTNR waterflow detector is designed to fit only the appropriate tee fitting.
NOTE: Leg of tee perpendicular to flow of water must have a 1-inch NPT
thread. Do not use a reducer to achieve the correct thread size. Failure
to follow this instruction will result in failure of the detector to report a
waterflow condition.
2. WFDT units are shipped without the paddles mounted to the actuator.
Select the correct size paddle for the tee being used the appropriate nomi-
nal pipe diameter size is molded on the surface of the paddles. Align hole
on stem of paddle with hole on actuator lever. Fasten together using a
#4-40×
1
⁄
4
-inch fillister head screw supplied in bag assembly. See Figure
2. Use only the screw provided with the WFDTNR. Drive screw head
SpECIFICATIONS
Contact Ratings:
10 A @ 125/250 VAC
; 2.5 A @ 24 VDC
Triggering Threshold Bandwidth (Flow Rate): 4 to 10 GPM
Static Pressure Rating:
250 PSI (Max.)
Dimensions (Installed):
3
1
⁄
4
in H × 3
1
⁄
4
in W × 4
1
⁄
4
in D; 3
1
⁄
4
in above pipe tee
Operating Temperature Range:
32°F to 120°F (0°C to 49°C)
Shipping Weight:
1.5 lbs
Enclosure Rating:
IP56
U. S. Patent Number:
5,213,205
I56-0
509-009R