Safe Signal WFD20EN User manual

WFDEN Vane-type Waterow Detector
INSTALLATION AND MAINTENANCE INSTRUCTIONS
IMPORTANT
Please Read Carefully And Save
This instruction manual contains important information about the installation and
operation of waterflow detectors. Purchasers who install waterflow detectors 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 instructions that
apply to the model you are installing.
CAUTION
The model WFDEN is a vane-type waterflow detector for use in wet-pipe fire sprin-
kler systems only. Vane-type waterflow detectors shall not be used as the sole initiat-
ing device in both deluge and preaction systems; waterflow detectors used in these
types of systems may result in an unintended discharge caused by a surge, trapped air
or a short retard time.
WARNING
Installation must be performed by qualified personnel and in accordance with all na-
tional and local codes and ordinances.
Shock hazard: Disconnect power source before servicing. Serious injury or death
could result.
Risk of explosion: Not for use in hazardous locations. Serious injury or death could
result.
PRINCIPLES OF OPERATION
Vane-type waterflow detectors mount to water-filled pipes in fire sprinkler systems.
Waterflow in the pipe deflects a vane, which produces a switched output, usually af-
ter a specified delay. All WFDENs have a pneumatically controlled mechanical delay
mechanism. Delays do NOT accumulate; they reset if the flow of water stops or drops
below minimum triggering flow rate before the entire delay has elapsed.
All switches actuate on a sustained flow of water greater than the maximum specified
in Table 1, but will not activate if the flow rate is less than the minimum specified in
Table 1.
This Safe Signal installation manual covers the following waterflow detectors for fire
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)
WFD20EN 50 (2) 60.3 2.3/2.9 47 60.3 3.6
WFD25EN 66 (2,5) 76.1 2.6/2.9 49 76.0 3.6
WFD30EN 80 (3) 88.9 2.9/3.2 47 88.8 4.0
WFD40EN 100 (4) 114.3 3.2/3.6 53 114.1 4.5
WFD60EN 150 (6) 168.3 4.0/4.5 55 165.1 5.0
WFD80EN 200 (8) 219.1 4.5/5.9 64 219.1 6.3
SPECIFICATIONS
Contact Ratings: 10 A @ 125/250 VAC~; 2.5 A @ 24 VDC EC–certificate Number: 0786-CPR-40299
Triggering Flow Rate: Refer to Table 1 EN12259–5
Static Pressure Rating (maximum): 17.25 bar (250 psi) (1725 KPa); 16 bar (VdS) VDS Certificate Number: G 415003
Operating Temperature Ranges: 0°C to 68°C (32°F to 155°F)
Compatible Pipe: Steel Water Pipe (Refer to Table 1)
Shipping Weight: 3 to 6 lbs (according to size)
Enclosure Rating: Nema4/IP54
STEEL PIPE COMPATIBILITY
CAUTION
Do not use any of the WFDEN models on copper pipe. The clamping forces of the
mounting bolts may collapse the pipe sufficiently to prevent the detector from func-
tioning properly.
Do NOT install steel or iron pipe sections in copper piping for mounting a waterflow
detector. Incompatibility between the dissimilar metals causes 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.
NOTE: Installation methods other than those listed in this installation manual may
prevent the device from reporting the flow of water in the event the associated fire
sprinkler system is activated by a fire. Safe Signal 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 re-
moval and a clear view of it for inspections. See Figure 1 for mounting dimen-
sions.
2. Locate the unit 1.8 – 2.1 meters above the floor to protect from accidental dam-
age.
3. On horizontal runs, the detector must be positioned on the top of the pipe, not
on the side or below. Do not mount it upside down because condensation may
collect in the housing and impair the operation of the detector. For vertical flow
applications, mount detector on pipe through which water flows upward. Oth-
erwise, the unit may not operate properly.
4. Mount detector at least 15 cm from a fitting that changes the direction of the
waterflow, or no closer than 61 cm from a valve or drain.
5. BE SURE DIRECTION-OF-FLOW ARROW AND DIRECTIONAL COVER
MATCHES ACTUAL DIRECTION OF FLOW IN THE PIPE. See Figure 6.
MOUNTING INSTRUCTIONS
1. Drain the pipe.
2. Cut a hole in the pipe in the desired location. Center the hole on the pipe as
shown in Figure 2, and be sure the hole is perpendicular to the center of the
pipe. Before drilling, use a punch or scribe to mark the drill site to prevent the
bit from slipping. 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.
CAUTION
When drilling the hole with a hole saw, make certain that center of hole saw cut does
not remain in pipe.
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TABLE 2.
MODEL NUMBER HOLE DIAMETER TORQUE SETTING
WFD20EN 31.8 mm +1.6 mm
11/4in +1/16 in
40.7 - 47.5 NT-M
30 - 35 FT-LBS
WFD25EN
WFD30EN
50.8 mm + 1.6 mm
2 in +1/16 in
61.6 - 67.8 MT-M
45 - 50 FT-LBS
WFD40EN
WFD60EN
WFD80EN
3. Remove burrs and sharp edges from the hole. Clean and remove all scale and
foreign matter from the inside wall of pipe for a distance equal to the pipe di-
ameter on either side of the hole 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 4). Seat the saddle firmly against the pipe so that the locating
boss goes into the hole.
5. Install the U-bolt, tightening the nuts alternately to ensure a uniform seal (see
Table 2 for torque values).
6. Remove the 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 cause before proceeding
CAUTION
Be sure the direction-of-flow arrow and directional cover point in the correct direc-
tion, or else waterflow will go unreported. See Figure 4.
FIGURE 1. MOUNTING DIMENSIONS
8.9 CM
(3.5")
6.6 CM
(2.6")
PIPE DIAMETER
PLUS 12.7 CM
(5")
PIPE
VANE
OVERALL WIDTH = PIPE DIAMETER + 6.4 CM (2.5")
U-BOLT
NUT
PIPE
SADDLE
U-BOLT
PIPE
W038400
FIGURE 2. LOCATION OF MOUNTING HOLE TOP VIEW
WRONG
RIGHT
REMOVE BURRS FROM EDGE OF HOLE. CLEAN OUT SCALE
AND FOREIGN MATTER FROM INSIDE WALL OF PIPE.
W010600
PREOPERATION TESTING
1. Fill the fire sprinkler system and check for leaks around the waterflow detector.
If it leaks, first check for proper torque on U-bolt nuts. If leak persists, drain the
system and remove the detector (refer to Maintenance). Check for dirt or for-
eign objects under the gasket, and make sure that the pipe surface is not dented.
Reinstall the detector and check again for leaks. Do not proceed until all leaks
have been stopped.
2. Connect an ohmmeter or continuity tester across COM and B-NO switch ter-
minals. The ohmmeter should indicate an open circuit.
3. Deflect the actuator lever and hold it until the pneumatic delay shaft releases the
switch buttons. The ohmmeter or continuity tester should show a short circuit
after the delay has elapsed. If there is no delay, check the setting of the delay
adjustment dial.
FIELD WIRING
1. All models have two SPDT switches. Switch contacts COM and B-NO are closed
when water is flowing and open when water is not. Connect the switches as
shown in Figure 7 depending on the application.
2. When connected to a listed fire sprinkler/fire alarm control panel, the initiating
circuit must be unable to be silenced.
3. A ground screw is provided with all waterflow detectors. When grounding is
required, clamp wire with screw in hole located between conduit entrance holes,
see Figure 5.
4. Use proper waterproof conduit fittings where required.
WARNING
High Voltage. Electrocution Hazard. Do not handle live AC wiring or work on a device to
which AC power is applied. Doing so may result in severe injury or death.
When utilizing switches at voltages greater than 74VDC or
49VAC~means to provide all–pole disconnection must be incorporated in the field
wiring, such as a circuit breaker.
MECHANICAL DELAY ADJUSTMENT
The pneumatic delay is preset at the factory to a dial setting of approximately 25 sec-
onds. To adjust the setting, turn the adjustment dial clockwise to increase the delay,
counterclockwise to decrease it. Delay can be adjusted over a range from 0 to 30 sec-
onds maximum, see Figure 3.
NOTE: Set the delay to the minimum required to prevent false alarms due to flow
surges.
Periodically test time delay as required by Authority Having Jurisdiction or code au-
thority.
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FIGURE 3. DELAY ADJUSTMENT DIAL
NOTE: NUMBER ON DIAL IS APPROXIMATE TIME DELAY IN SECONDS.
DELAY
ADJUSTMENT
DIAL
W038601
OPERATIONAL TESTING
Always notify the central station monitoring waterflow alarms before repairing,
maintaining or testing waterflow alarm devices.
1. Replace the cover and tighten the tamper-proof screws with the tamper-proof
wrench. Store the wrench in a secure place.
2. Open the inspector’s test valve and time how long it takes for the detector to
indicate a flow condition. The detector should remain activated until the inspec-
tor’s test valve is closed. Air pockets in the sprinkler system may increase the
apparent time delay.
MAINTENANCE
To prevent accidental water damage, control valves should be shut tight and the system
completely drained before waterflow detectors are removed or replaced.
Inspect detectors in accordance with applicable codes and standards and/or the
Authority Having Jurisdiction for leaks and replace if a leak occurs. Test detectors
at least quarterly as described under Operational Testing to ensure proper operation.
Test more often as required by applicable codes or standards.
Under normal conditions Safe Signal waterflow detectors should provide years of
trouble-free service. If any part of the detector does not perform properly, replace
the entire detector. Installation methods other than those listed in this installation
manual may prevent the device from reporting the flow of water in the event the as-
sociated fire sprinkler system is activated by a fire. Safe Signal is not responsible for
devices that have been improperly installed, tested, or maintained.
Proceed as follows to remove a detector:
1. Drain the pipe.
2. Turn off electrical power to the detector, and then disconnect wiring.
3. Loosen nuts and remove U-bolts.
4. Gently lift the saddle far enough to get your fingers under it. With your fingers,
roll the vane so it will fit through the hole while continuing to lift the waterflow
detector saddle.
5. Li detector clear of pipe.
CAUTION
If a vane breaks o in a pipe, nd and remove it. If it is not removed, the vane may
restrict the proper ow of water to all or part of the re sprinkler system.
FIGURE 4. ASSEMBLY DIAGRAM
WATERFLOW
U-BOLT
PIPE
SADDLE GASKET
REFER TO
TABLE 1
U-BOLT
NUT
ELECTRICAL
CONDUIT
ENTRANCE
COVER
TAMPER PROOF
WRENCH
(P/N WFDW)
ROLL PADDLE
OPPOSITE OF
FLOW ARROW
WHILE INSERTING
PIPE SADDLE
MOUNTING PLA
TE
TIMER
(REPLACEMENT
P/N FS-RT)
COVER TAMPER
SWITCH
(OPTIONAL P/N CT
S)
W039201
FIGURE 5. GROUND SCREW LOCATION
GROUND
GROUND
SCREW
SCREW
W038301
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1. Waterflow detectors may not work or operate properly if sprinkler piping being monitored is
plugged with pipe scale, mud, stones or other foreign material. Sprinkler systems should be
checked regularly for such blocking material.
2. Alarms generated by the activation of waterflow detectors may not be received by a central
station if telephone or other communication lines to the detector are out of service, disabled,
or open.
3. Vane-type waterflow detectors have a normal service life of 10–15 years. Hard water systems,
however, may reduce waterflow detector service life significantly.
WARNING
THE LIMITATIONS OF WATERFLOW ALARM DEVICES
4. Waterflow detectors are not a substitute for insurance. Building owners should always insure
property and lives being protected by sprinkler systems.
5. If valves controlling the water supply to a sprinkler system are closed, vane-type waterflow
detectors will not work. All valves controlling a sprinkler water supply should be sealed or
locked in the normally open position. The normally open position should be monitored by a
sprinkler supervisory switch.
FIGURE 6. DIRECTIONAL COVER
NOTCHED COVER INDICATES FLOW DIRECTION AT A
DISTANCE FROM MULTIPLE VIEWING ANGLES
W038200
FIGURE 7. FIELD WIRING
UL-LISTED
COMPATIBLE
CONTROL PANEL
POWER
24VDC OR
120 VAC
SUGGESTED EOL
RESISTOR
SSM24-X
SSV120-X
NOTE: COMMON AND B-NO
CONNECTIONS WILL CLOSE
WHEN VANE IS DEFECTED,
I.E.,WHEN WATER IS FLOWING.
DUAL SWITCHES PERMIT
APPLICATIONS TO BE COMBINED
ON A SINGLE DETECTOR.
CONTACT RATINGS
SCHEMATIC OF
INDIVIDUAL
SWITCH IN
“NO WATERFLOW”
CONDITION
A-NC
COM
B-NO
BREAK WIRE AS
SHOWN FOR
SUPERVISION OF
CONNECTION. DO
NOT ALLOW
STRIPPED WIRE
LEADS TO EXTEND
BEYOND SWITCH
HOUSING. DO NOT
LOOP WIRES.
125 / 250 VAC
24 VDC
10 AMPS
2.5 AMPS
INITIATING
LOOP
W039302
THREE-YEAR LIMITED WARRANTY
SAFE SIGNAL warrants that the equipment herein shall conform to said descriptions as to all af-
firmation of fact and shall be free from defects of manufacture, labeling, and packaging for a pe-
riod of three (3) years from the invoice date to the original purchaser, provided that representative
samples are returned to SAFE SIGNAL for inspection. Upon a determination by SAFE SIGNAL
that a product is not as warranted, SAFE SIGNAL shall, at its exclusive option, replace or repair
said defective product or parts thereof at its own expense except that Purchaser shall pay all
shipping, insurance, and similar charges incurred in connection with the replacement of the
defective product or parts thereof. This Warranty is void in the case of abuse, misuse, abnormal
usage, faulty installation, or repair by unauthorized persons, or if for any other reason SAFE
SIGNAL determines that said product is not operating properly as a result of causes other than
defective manufacture, labeling, or packaging.
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