System Sensor WFDE Series User manual

D770-53-00 1 I56-2617-001R
WFDE Vane-type Waterflow Detector
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: [phone]
www.systemsensor.com
Important
Please Read Carefully And Save
This instruction manual contains important information about the instal-
lation and operation of waterflow detectors. Purchasers who install wa-
terflow 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 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 pro-
duces a switched output, usually after a specified delay. All WFDEs have
a pneumatically controlled mechanical delay mechanism. Delays are non-
cumulative; 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 activate if the flow rate is less than the minimum
specified in Table 1.
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
dissimilar metals will cause bimetallic corrosion.
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° – 68°C (32° – 155°F)
Compatible Pipe: Steel Water Pipe (Refer to Table 1)
Shipping Weight: 1.8 – 3.2 Kilograms
Enclosure Rating: Nema4/IP54
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 de-
vices that have been improperly installed, tested or maintained.
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 applications, 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 direc-
tion of the water flow, or no closer than 61 cm from a valve or drain.
5. BE SURE DIRECTION-OF-FLOW ARROW MATCHES ACTUAL DI-
RECTION 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 holesaw 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.
This System Sensor installation manual covers the following waterflow
detectors for sprinkler/fire alarm applications.
Table 1.
MODEL
NUMBER
DN
REF. PIPE
SIZE - mm (in)
NOMINAL
PIPE O.D.
(mm)
WALL
THICKNESS
(mm)
TRIGGERING
FLOW RATE
(liters/min)
WFD20E 50 (2) 60.3 2.3/2.9
30 – 57
WFD25E 65 (2-1/2) 76.1 2.6/2.9
WFD30-2E 80 (3) 88.9 2.9/3.2
WFD40E 100 (4) 114.3 3.2/3.6
WFD60E 150 (6) 168.3 4.0/4.5
WFD80E 200 (8) 219.1 4.5/5.9

D770-53-00 2 I56-2617-001R
CAUTION
When drilling out hole, make certain that center of hole saw cut does not
remain in pipe.
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 in-
sert it through the hole (see Figure 3). Seat the saddle firmly against
the pipe so that the locating boss goes into the hole.
5. 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, other-
wise a waterflow condition will go unreported. See Figure 3.
Preoperation Testing
1. Fill the sprinkler system and check for leaks around the WFDE. If it
leaks, first check for proper torque on U-bolt nuts. If leak persists,
drain the system and remove the detector (see removal instructions
under Maintenance). Check for dirt or foreign objects under the gasket.
Check that 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) ter-
minal switch contacts (see Figure 4). The ohmmeter should show an
open circuit, no continuity.
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
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.
1. All models have two SPDT switches. Switch contacts (COM and B) are
closed when water is flowing and open when water is not flowing. Con-
nect the switches as shown in Figure 4 depending on the application.
2. When connected to a listed sprinkler/fire alarm control panel, the ini-
tiating circuit must be non-silenceable.
3. A ground screw is provided with all WFDE units. 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.
5. A 22.2 mm conduit hole is provided for electrical connection. An additional
22.2 mm diameter knockout is provided for multiple line connections.
Mechanical Delay Adjustment
The pneumatic delay is preset at dial setting 25 at the factory. To adjust the
delay, turn the adjustment dial on the delay mechanism. Turn clockwise to
increase the delay, counterclockwise to decrease the delay. Delay can be ad-
justed over a range from 0 to 30 seconds maximum. See Figure 6 (page 4).
NOTE: Set the delay to the minimum required to prevent false alarms due
to flow surges.
After extended service, parts of the detector may become worn reducing the
delay time and causing false alarms. If this happens, increase the delay.
Figure 2. Location of mounting hole:
Figure 1. Mounting dimensions:
W0105-00
W0106-00
Table 2:
7.6 cm
(3 ˝)
9.5 cm
(3-3/4˝)
Pipe saddle
U-bolt nut
Plastic vane
Pipe
U-bolt
Overall width = pipe diameter + 7.6 cm (3˝)
Pipe diameter
plus 13.3 cm
(5-1/4˝)
Wrong
Right
Remove burrs from edge of hole. Clean out scale
and foreign matter from inside wall of pipe.
MODEL
NUMBER
HOLE
DIAMETER
TORQUE
SETTING
WFD20E 31.8 mm +1.6 mm
1-1/4 in. +1/16 in
40.7 - 47.5 NT-M
30 - 35 FT-LBS
WFD25E
WFD30-2E
50.8 mm + 1.6 mm
2 in. +1/16 in.
74.6 - 81.3 NT-M
55 - 60 FT-LBS
WFD40E
WFD60E
WFD80E

D770-53-00 3 I56-2617-001R
Operational Testing
Always notify the central station monitoring waterflow alarms before re-
pairing, maintaining or testing waterflow alarm devices.
1. Replace the cover and tighten the security screws with the security
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 ac-
tivated until the inspector’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 re-
moved or replaced.
Inspect detectors monthly for leaks. If leaks are found, replace the detec-
tor. Test detectors at least quarterly as described under Operational Testing
above to insure proper operation. Test more often as required by appli-
cable codes or standards.
Under normal conditions System Sensor waterflow detectors should pro-
vide years of trouble-free service. If any part of the detector does not per-
form properly, replace the entire detector. Failure to follow this instruction
may result in failure of the detector to report a waterflow condition.
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 continu-
ing to lift the waterflow detector saddle.
5. Lift detector clear of pipe.
CAUTION
If a vane breaks off in a pipe, find and remove it. Failure to do so may
restrict the proper flow of water to part of the sprinkler system.
Figure 3. Assembly diagram:
Figure 4. Field wiring:
W0234-02
WFDE
BB
COM
COM
WFDE
BB
COM COM
nonsilenceable
initiating zone of listed
Fire Alarm Control Panel
Typical Fire Alarm Control Panel Connection
Two Waterflow Detectors Shown
power source
compatible
with bell
local
bell
COM
B
Typical Local Bell Connection
Top View 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.
end-of-line-resistor
Break wire as shown for
supervision of connection.
DO NOT allow stripped wire
leads to extend beyond
switch housing. DO NOT
loop wires.
CONTACT RATINGS
125/250 VAC
24 VDC
10 AMPS
2.5 AMPS
B
COM
A
Schematic of
Individual Switch
in “No Waterflow”
Condition
T16-0010-XXX
B
COM
A
COM
COM
SWITCH 1 SWITCH 2
A B B A
•CAUTION•
ROUTE WIRING
AWAY FROM
SHARP EDGES
& COMPONENTS
SWITCH SCHEMATIC
•READY• STATE
Cover
Tamper proof wrench
Delay mechanism
Pipe saddle
Plastic vane
Mounting plate
Roll paddle opposite
of flow arrow
while inserting
Saddle gasket
Waterflow
U bolt nut
Electrical conduit entrance
(22.2 mm dia.)
Terminal block
Pipe
U bolt
Refer to Table 2
MODEL
NUMBER
HOLE
DIAMETER
TORQUE
SETTING
WFD20E 31.8 mm +1.6 mm
1-1/4 in. +1/16 in
40.7 - 47.5 NT-M
30 - 35 FT-LBS
WFD25E
WFD30-2E
50.8 mm + 1.6 mm
2 in. +1/16 in.
74.6 - 81.3 NT-M
55 - 60 FT-LBS
WFD40E
WFD60E
WFD80E
W0101-02

D770-53-00 4 I56-2617-001R
©2005 System Sensor
System Sensor warrants its enclosed product to be free from defects in materi-
als and workmanship under normal use and service for a period of three years
from date of manufacture. System Sensor makes no other express warranty for
this air duct smoke detector. No agent, representative, dealer, or employee of
the Company has the authority to increase or alter the obligations or limitations
of this Warranty. The Company’s obligation of this Warranty shall be limited
to the replacement of any part of the product which is found to be defective
in materials or workmanship under normal use and service during the three
year period commencing with the date of manufacture. After phoning System
Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authorization
number, send defective units postage prepaid to: System Sensor, Returns
Department, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please
include a note describing the malfunction and suspected cause of failure.
The Company shall not be obligated to replace units which are found to be
defective because of damage, unreasonable use, modifications, or alterations
occurring after the date of manufacture. In no case shall the Company be
liable for any consequential or incidental damages for breach of this or any
other Warranty, expressed or implied whatsoever, even if the loss or damage
is caused by the Company’s negligence or fault. Some states do not allow the
exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you. This Warranty gives you specific
legal rights, and you may also have other rights which vary from state to state.
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.
20
0510 15 25
Dial setting
0
5
10
15
20
25
Table of dial settings
embossed here
(see below)
Delay
adjustment
dial
Figure 6. Delay adjustment dial:
GROUND
SCREW
(GREEN)
MOUNTING
PLATE
Figure 5. Ground screw location:
W0103-00
W0102-03
Dial setting equals delay in seconds
Reference only
Please refer to insert for the Limitations of Fire Alarm Systems
Three-Year Limited Warranty