Data Sheet - System Sensor

WFDEN Series
Waterflow Detector
The System Sensor WFDEN series is compatible with pipe
diameters ranging from 50mm through 200mm and can be
mounted in a vertical or horizontal position.
Features
• Compliant with Construction Products Regulation
• New directional cover allows installers and inspectors to easily
see the direction of flow.
• European models are IP56 rated
• New cover provides a better seal, is lighter weight, not painted
and corrosion resistant.
• Sealed retard mechanism immune to dust and other contaminants
• Less exposed metal reduces shock hazard, plastic cover acts as
insulator and is resistant to arcing.
• Visual switch activation
• Audible switch activation (73 dBA)
• Field-replaceable timer/switch assembly.
• Accommodates up to 12 AWG wire
• 100 percent synchronization activates both alarm panel and local
bell or horn strobe.
• Tamper-resistant cover screws
• Improved water sealing
• Reduced product weight
• Wire-ready terminals
• Improved wiring with new terminal block layout
• Snap-in optional cover tamper switch
• Timer repeatability
• Dial accuracy
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VdS
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Agency Listings
The new WFDEN Series waterflow detectors from System
Sensor consists of a rugged, IP56-rated enclosure that is more
damage resistant than previous metal designs. The waterflow
detector is designed for both indoor and outdoor use, with the widest
available temperature range, from 0°C to 68°C (32°F to 55°F).
Models are equipped with tamper-resistant cover screws to prevent
unauthorized entry. Inside, two sets of SPDT (Form C) synchronized
switches are enclosed in a durable terminal block with new layout
designed to make wiring easy with wire ready terminals, COM
terminals are on a different elevation, large barrier between switches
and easy to read raised textured lettering all make wiring easy. An
optional cover tamper switch is available, securely snaps into place,
no tools required.
The WFDEN series incorporates a mechanical time delay feature,
which minimizes the risk of false alarm due to pressure surges or air
trapped in the fire sprinkler system. The larger and easy to turn timer
dial makes setting the waterflow detector easy with high contrast pad
printed markings and three tabs to help with turning.
The WFDEN series is designed for accuracy and repeatability. The
detector also offers improved performance during vibration in riser
applications where detectors are exposed to a large in rush of water.
Waterflow Detector Specifications
Engineering Specifications
Vane-type waterflow detectors shall be installed on system piping as designated on the drawing and/or as specified herein. Detectors shall
mount on any clear pipe span of the appropriate nominal size, either a vertical upflow or horizontal run, at least 15 cm (6 in) from any fittings
that may change water direction, flow rate, or pipe diameter or no closer than 61 cm (24 in) from a valve or drain. The detector shall respond
to waterflow in the specified direction after a preset time delay that is field adjustable. The delay mechanism shall be a sealed mechanical
pneumatic unit with visual and audible indication of actuation. The actuation mechanism shall include a ethylene vinyl acetate vane inserted
through a hole in the pipe and connected by a mechanical linkage to the delay mechanism. Outputs shall consist of dual SPDT switches (Form
C contacts). Two conduit entrances for standard fittings of commonly used electrical conduit shall be provided on the detectors. A grounding
provision is provided. Unless noted, enclosures shall be IP56-rated. All detectors shall be Factory Mutual for indoor or outdoor use.
Standard Specifications
Static Pressure Rating LPC: 17.25 BAR (250 PSI)
VdS: PN16 (16 BAR, 232 PSI)
Maximum Surge
18 Feet Per Second (FPS)
Triggering Threshold
30-57 liters/minute
Bandwidth (Flow Rate)
Conduit Entrances
Two openings 22.2 mm (.875 in.) diameter.
One open, one knock-out type
Operating Temperature Range 32°F to 120°F (0°C to 49°C)
IP56
Standard with ULC models, optional for
UL and European models, part no. CTS
3 Years
Enclosure Rating*
Cover Tamper Switch
Warranty
Two sets of SPDT (Form C)
10.0 A, ½ HP @ 125/250 VAC
2.5 A @ 6/12/24 VDC
Contact Ratings
Compatible Pipe
Model
Ref. Pipe Size mm (in.)
WFD20EN
WFD25EN
WFD30EN
WFD40EN
WFD60EN
WFD80EN
50 (2)
65 (2½)
80 (3)
100 (4)
150 (6)
200 (8)
Nominal Pipe O.D. (mm)
Wall Thickness (mm)
LPC
60.3
76.0
88.8
114.1
165.1
219.1
LPC
3.6
3.6
4.0
4.5
5.0
6.3
WFDEN Field Wiring Diagram
SSM24-X
SSV120-X
UL-LISTED
COMPATIBLE
CONTROL PANEL
POWER
24VDC
OR
120VAC
INITIATING
LOOP
+
VdS
60.3
76.1
88.9
114.3
168.3
219.1
VdS
2.3/2.9
2.6/2.9
2.9/3.2
3.2/3.6
4.0/4.5
4.5/5.9
NOTE: COMMON AND B-NO
CONNECTIONS WILL CLOSE
WHEN VANE IS DEFLECTED, I.E.,
WHEN WATER IS FLOWING. DUAL
SWITCHES PERMIT
APPLICATIONS TO BE COMBINED
ON A SINGLE DETECTOR.
CONTACT RATINGS
+
-
SUGGESTED EOL
RESISTOR
125/250 VAC
24 VDC
SCHEMATIC OF
INDIVIDUAL
SWITCH IN
"NO WATERFLOW"
CONDITION
BREAK WIRE AS
SHOWN FOR
SUPERVISION OF
CONNECTION. DO
NOT ALLOW
STRIPPED WIRE
LEADS TO EXTEND
BEYOND SWITCH
HOUSING. DO NOT
LOOP WIRES.
10 AMPS
2.5 AMPS
A-NC
COM
B-NO
Delay Adjustment Dial
DELAY
ADJUSTMENT
DIAL
NOTE: NUMBER ON DIAL IS APPROXIMATE TIME DELAY IN SECONDS.
Overall Dimensions, Installed
8.9 CM
(3.5")
6.6 CM
(2.6")
PIPE DIAMETER
PLUS 12.7 CM
(5")
U-BOLT
NUT
PIPE
SADDLE
PIPE
PIPE
VANE
U-BOLT
OVERALL WIDTH = PIPE DIAMETER + 6.4 CM (2.5")
Ordering Information
UL Model
WFD20EN
WFD25EN
WFD30EN
WFD40EN
WFD60EN
WFD80EN
Accessories
CTS
WFDW
Pipe Size
50mm (2 in.)
65mm (2½ in.)
80mm (3 in.)
100mm (4 in.)
150mm (6 in.)
200mm (8 in.)
Hole Size
31.8mm (1¼ in.)
31.8mm (1¼ in.)
50.8mm (2 in)
50.8mm (2 in.)
50.8mm (2 in.)
50.8mm (2 in.)
Tamper-proof switch kit
Tamper-proof wrench for cover
*Maximum pressure rating 400 psi as approved by Factory Mutual.
3825 Ohio Avenue • St. Charles, IL 60174
Phone: 800-SENSOR2 • Fax: 630-377-6495
www.systemsensor.com
©2015 System Sensor.
Product specifications subject to change without notice. Visit systemsensor.com
for current product information, including the latest version of this data sheet.
WFDS44501 • 02/15