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D770-53-00 1 I56-2617-004R

WFDE 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. Follow only those instruc-

tions that apply to the model you are installing.

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 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 water-filled pipes in sprinkler sys-

tems. Waterflow in the pipe deflects a vane. Deflection of the vane produces a

switched output, usually after a specified delay. All WFDEs have a pneumati-

cally controlled mechanical delay mechanism. Delays are noncumulative; they

reset if the flow of water stops or drops below minimum triggering flow rate

before the entire delay has elapsed. All detectors will activate on a sustained

flow of water greater than the maximum specified in Table 1, but will not acti-

vate if the flow rate is less than the minimum specified in Table 1.

This System Sensor installation manual covers the following waterflow detec-

tors for sprinkler/fire alarm applications.

TABLE 1:

VdS LPCB

Model

Number

DN Ref.

Pipe Size

mm (in)

Nominal

Pipe

O.D.

(mm)

Wall

Thickness

(mm)

Triggering

Flow Rate

(liters/min)

Nominal

Pipe O.D.

(mm)

Wall

Thickness

(mm)

WFD20E 50 (2) 60.3 2.3/2.9

30-57

60.3 3.6

WFD25E 66 (2,5) 76.1 2.6/2.9 76.0 3.6

WFD30-2E 80 (3) 88.9 2.9/3.2 88.8 4.0

WFD40E 100 (4) 114.3 3.2/3.6 114.1 4.5

WFD60E 150 (6) 168.3 4.0/4.5 165.1 5.0

WFD80E 200 (8) 219.1 4.5/5.9 219.1 6.3

STEEL PIPE COMPATIBILITY

CAUTION

DO NOT USE THE ABOVE MODELS ON COPPER PIPE. The clamping forces of

the mounting bolts may collapse the pipe sufficiently to prevent the detector

from functioning properly.

DO NOT INSTALL STEEL OR IRON PIPE SECTIONS IN COPPER PIPING FOR

MOUNTING A WATERFLOW DETECTOR. Incompatibility between the dis-

similar metals will cause bimetallic corrosion.

INSTALLATION GUIDELINES

Before installing any waterflow alarm device, be thoroughly familiar with national

codes of practice 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.

SPECIFICATIONS

Contact Ratings: 10 A @ 125/250 VAC

; 2.5 A @ 24 VDC EC–certificate Number: 0786-CPD-40151

Triggering Flow Rate: Refer to Table 1 EN12259–5

Static Pressure Rating (maximum): 17.25 bar (250 psi) (1725 KPa); 16 bar (VdS)

Operating Temperature Ranges: 0°C to 68°C (32°F to 155°F)

Compatible Pipe: Steel Water Pipe (Refer to Table 1)

Shipping Weight: 1.8 – 3.2 Kilograms

Enclosure Rating: Nema4/IP54

1. Mount the detector where there is adequate clearance for installation

and removal and a clear view of it for inspections. See Figure 1 for

mounting dimensions.

2. Locate the unit 1.8 – 2.1 meters above the floor to protect from damage.

3. On horizontal runs, position the detector on top or on the side of the

pipe. Do not mount it upside down because condensation may collect in

the housing and impair the operation of the detector. For vertical flow ap-

plications, mount detector on pipe where upflow conditions exist. Failure

to do so may prevent unit from operating properly.

4. Mount detector at least 15 cm from a fitting which changes the direction

of the water flow, or no closer than 61 cm from a valve or drain.

5. BE SURE DIRECTION-OF-FLOW ARROW MATCHES ACTUAL DIREC-

TION OF FLOW IN THE PIPE.

MOUNTING INSTRUCTIONS

1. Drain the pipe.

2. Cut a hole in the desired location. Center the hole in the pipe as shown

in Figure 2, and be sure the hole is perpendicular to the center of the

pipe. If the hole is off center, the vane will bind against the inside wall of

the pipe. Use a drill or hole saw to cut a hole of the proper diameter. See

Table 2 for hole size. Before drilling, use a punch or scribe to mark the

drill site to keep the bit from slipping.

CAUTION

When drilling out hole, make certain that center of hole saw cut does not

remain in pipe.

TABLE 2:

MODEL NUMBER HOLE DIAMETER TORQUE SETTING

WFD20E

31.8 mm +1.6 mm

/4 in +

/16 in

40.7 - 47.5 NT-M

30 - 35 FT-LBS

WFD25E

WFD30-2E

50.8 mm + 1.6 mm

2 in +

/16 in

74.6 - 81.3 NT-M

55 - 60 FT-LBS

WFD40E

WFD60E

WFD80E

3. Remove burrs and sharp edges from hole. Clean out scale and foreign mat-

ter from inside wall of pipe to ensure free movement of the vane. Clean the

outside of the pipe to remove dirt, metal chips, and cutting lubricant.

4. Seat the saddle gasket against the saddle and mount detector directly to

pipe. Carefully roll the vane opposite the direction of flow and insert it

through the hole (see Figure 5). Seat the saddle firmly against the pipe so

that the locating boss goes into the hole.

Install the U-bolt around the pipe. Thread both nuts onto the U-bolt and tighten

them alternately to ensure a uniform seal. See Table 2 for torque values.

6. Remove the metal cover with the tamper proof wrench provided. Move

the actuator lever back and forth to check for binding. If the vane binds,

remove the detector and correct the problem before proceeding.

CAUTION

Be sure the direction-of-flow arrow points in the correct direction, otherwise a

waterflow condition will go unreported. See Figure 5.

I56-2617-004R

1 2 3 4

Indice de contenidos

Pagina 1

D770-53-00 1 I56-2617-004RWFDE Vane-type Waterﬂow DetectorINSTALLATION AND MAINTENANCE INSTRUCTIONS 3825 Ohio Avenue, St. Charles, Illinois 601741-80

Pagina 2 - W0102-04

D770-53-00 2 I56-2617-004RFIGURE 1. MOUNTING DIMENSIONS:7.6 CM(3˝)9.5 CM(33/4˝)PIPE DIAMETERPLUS 13.3 CM(51/4˝)PIPEVANEPIPEU-BOLT NUTPIPE SADDLEU-BOL

Pagina 3 - WATERFLOW

D770-53-00 3 I56-2617-004ROPERATIONAL TESTINGAlways notify the central station monitoring waterflow alarms before repair-ing, maintaining or testing

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