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.

Waterflow Detector Specifications

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

Standard Specifications

Static Pressure Rating

LPC: 17.25 BAR (250 PSI)

VdS: PN16 (16 BAR, 232 PSI)

Triggering Threshold Bandwidth (Flow Rate)

30–57 liters/minute

Contact Ratings; Two sets of SPDT (Form C)

10.0 A @ 125/250 VAC

2.5 A @ 24 VDC

Conduit Entrances

Two openings 22.2mm (.875 in.) diameter. One open, one knock-out type

Operating Temperature Range

0°C to 68°C (32°F to 155°F)

Enclosure Rating

IP54

Shipping Weight

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.)

U.S. Patent Numbers

5,213,205; 4,782,333; 3,845,259

Warranty

3 Years

20

0

5

10

15

25

Dial setting

0

Delay

adjustment

dial

Dial setting equals delay in seconds. Reference only.

Delay Adjustment Dial

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

24 VDC

10 AMPS

2.5 AMPS

WFDE

BB

COM

COM

WFDE

BB

COM

COM

Typical FACP Connection

To nonsilenceable

initiating zone of

listed FACP

end-of-line resistor

B

COM

To power source

compatible

with bell

local

bell

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.

T16-0010-XXX

A

COM

B

CO

M

CO

M

SWITCH 1

SWITCH 2

AA

B

B

–CAUTION–

ROUTE WIRING

AWAY FROM

SHARP EDGES

& COMPONENTS

SWITCH SCHEMATIC

“READY” STATE

WFDE Field Wiring Diagram

Compatible Pipe

Model

Ref. Pipe

Size mm

(in.)

Nominal Pipe O.D.

(mm)

Wall Thickness

(mm)

LPC

VdS

LPC

VdS

WFD20E

50 (2)

60.3

60.3

3.6

2.3/2.9

WFD25E

65 (2½)

76.0

76.1

3.6

2.6/2.9

WFD30-2E

80 (3)

88.8

88.9

4.0

2.9/3.2

WFD40E

100 (4)

114.1

114.3

4.5

3.2/3.6

WFD60E

150 (6)

165.1

168.3

5.0

4.0/4.5

WFD80E

200 (8)

219.1

219.1

6.3

4.5/5.9

Shipping Weight

Model

WFD20E

WFD25E

WFD30-2E WFD40E

WFD60E

WFD80E

1.85 kg

(4.08 lbs.)

2.05 kg

(4.53 lbs.)

2.36 kg

(5.20 lbs.)

3.03 kg

(6.68 lbs.)

3.45 kg

(7.70 lbs.)

Ordering Information

Model

Pipe Size

Hole Size

WFD20E

50mm (2”)

31.8mm (1¼”)

WFD25E

65mm (2½”)

31.8mm (1¼”)

WFD30-2E

80mm (3”)

50.8mm (2”)

WFD40E

100mm (4”)

50.8mm (2”)

WFD60E

150mm (6”)

50.8mm (2”)

WFD80E

200mm (8”)

50.8mm (2”)