WFDE Series
Waterflow Detector
System Sensor’s WFDE 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 Directive
• EC Certificate Number 0786-CPD-40151
• WFD30-2E models install in 50.8mm (2”) hole sizes
• IP54 rated enclosure
• Sealed retard mechanism assures that the retard is not
contaminated by dust and dirt when the cover is removed
• Visual switch activation permits installer to accurately set the retard
even under extremely noisy conditions
• Rugged, dual SPDT switches are enclosed in a durable terminal
block for added strength
• 100% synchronization activates both alarm panel and local bell
simultaneously
Robust Construction.
The WFDE series consists of a rugged, IP54
rated enclosure. Designed for both indoor and outdoor use, the
WFDE series operates across a wide temperature range, from 0°C to
68°C (32°F to 155°F).
Reliable Performance.
WFDE 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 to ensure reliable performance.
False Alarm Immunity.
The WFDE series incorporates a
mechanical retard feature, which minimizes the risk of false alarm
due to pressure surges or air trapped in the sprinkler system. In
addition, the mechanical retard’s unique sealed design is immune
to dust and other contaminants.
Simplified Operation.
The WFDE series is designed to simplify
installation. Two conduit openings permit easy attachment to the
local alarm system. The retard mechanism and dual SPDT switches
are field-replaceable.
Agency Listings
VdS
TE83724
G4940006
1Z0A7.AH
Scientific Services
Laboratory
afp-836
0786
Waterflow Detector Specifications
Engineering Specifications
Vane-type System Sensor WFDE series waterflow detectors shall be installed on system piping as designated on the drawings 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, which 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, which is field adjustable. The delay mechanism shall be a sealed mechanical pneumatic
unit with visual indication of actuation. The actuation mechanism shall include a polyethylene 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 (one of which is
a knockout type) for standard fittings of commonly used electrical conduit shall be provided on the detectors. A grounding provision is provided. WFDE
waterflow detectors shall be approved by Factory Mutual, LPC, VdS and SSL.
Standard Specifications
Static Pressure Rating
Triggering Threshold Bandwidth (Flow Rate)
Contact Ratings; Two sets of SPDT (Form C)
Conduit Entrances
Operating Temperature Range
Enclosure Rating
Shipping Weight
U.S. Patent Numbers
Warranty
Compatible Pipe
Model
Ref. Pipe
Size mm
(in.)
Nominal Pipe O.D.
(mm)
LPC
VdS
60.3
76.0
88.8
114.1
165.1
219.1
60.3
76.1
88.9
114.3
168.3
219.1
Wall Thickness
(mm)
LPC
VdS
3.6
3.6
4.0
4.5
5.0
6.3
WFD60E
3.03 kg
(6.68 lbs.)
2.3/2.9
2.6/2.9
2.9/3.2
3.2/3.6
4.0/4.5
4.5/5.9
WFD80E
3.45 kg
(7.70 lbs.)
To power source
compatible
with bell
B
LPC: 17.25 BAR (250 PSI)
VdS: PN16 (16 BAR, 232 PSI)
30–57 liters/minute
10.0 A @ 125/250 VAC
2.5 A @ 24 VDC
Two openings 22.2mm (.875 in.) diameter. One open, one knock-out type
0°C to 68°C (32°F to 155°F)
IP54
WFD20E: 1.85 kg (4.08 lb.); WFD25E: 1.85 kg (4.08 lb.); WFD30-2E: 2.05 kg (4.53 lb.);
WFD40E: 2.36 kg (5.20 lb.); WFD60E: 3.03 kg (6.68 lb.); WFD80E: 3.45 kg (7.70 lb.)
5,213,205; 4,782,333; 3,845,259
3 Years
WFDE Field Wiring Diagram
A
B
B
A
WFD20E
50 (2)
WFD25E
65 (2½)
WFD30-2E
80 (3)
WFD40E
100 (4)
WFD60E
150 (6)
WFD80E
200 (8)
Shipping Weight
WFD20E
Model
WFD25E
1.85 kg
(4.08 lbs.)
SWITCH 1
M
CO
–CAUTION–
ROUTE WIRING
AWAY FROM
SHARP EDGES
& COMPONENTS
SWITCH 2
SWITCH SCHEMATIC
CO
“READY” STATE
M
A
COM
B
T16-0010-XXX
NOTE: Common and B 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
125/250 VAC
10 AMPS
24 VDC
2.5 AMPS
WFDE
B
B
WFDE
B
B
WFD30-2E WFD40E
2.05 kg
(4.53 lbs.)
2.36 kg
(5.20 lbs.)
To nonsilenceable
initiating zone of
listed FACP
end-of-line resistor
COM
COM
COM
COM
Typical FACP Connection
local
bell
COM
Delay Adjustment Dial
Delay
adjustment
dial
WFDE
switch assembly
Typical Local Bell Connection
Break wire as shown for
supervision of connection.
DO NOT allow stripped wire
leads to extend beyond
switch housing. DO NOT
loop wires.
0
10
Ordering Information
Model
Pipe Size
WFD20E
50mm (2”)
WFD25E
WFD30-2E
WFD40E
65mm (2½”)
80mm (3”)
100mm (4”)
150mm (6”)
200mm (8”)
5
25
20
Hole Size
31.8mm (1¼”)
31.8mm (1¼”)
50.8mm (2”)
50.8mm (2”)
50.8mm (2”)
50.8mm (2”)
Dial setting
0
Dial setting equals delay in seconds. Reference only.
15
5
10
15
20
25
WFD60E
WFD80E
3825 Ohio Avenue • St. Charles, IL 60174
Phone: 800-SENSOR2 • Fax: 630-377-6495
©2006 System Sensor.
Product specifications subject to change without notice. Visit systemsensor.com for
current product information, including the latest version of this data sheet.
A05-0243-007 • 7/06 • #1679
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