Safe Signal WFDTNRN User manual

WFDTNRN 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.
CAUTION
The model WFDTNRN is a vane-type waterflow detector for use in wet-pipe fire
sprinkler systems only. Vane-type waterflow detectors shall not be used as the sole ini-
tiating 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. Deflection of the vane produces a switched out-
put. All detectors will activate on a sustained flow of water greater than 10 gallons per
minute (gpm) but will not activate if the flow rate is less than 4 gpm.
COMPATIBLE PIPE TEES/RISERS
Model WFDTNRN is supplied with 12 paddles. One paddle is provided for each size
of the threaded, sweat or plastic tee. See Figure 1 and approximate tee depth chart.
Each paddle has an indication that shows the pipe size and type of tee to be used with.
FIGURE 1. MOUNTING DIMENSIONS
3-1/2"
2-5/8"
4"
TEE DEPTH
DESIGNED TO FIT WITHIN 2 X 4 STUD WALL CONSTRUCTION
PLASTIC VANE
TEE FITTING
INSTALLATION GAUGE
END OF PADDLE TREE MUST
FIT BETWEEN TOP OF TEE
AND BOTTOM OF FLANGE
TEE
ADAPTER
INSTALLATION GUIDELINES
Before installing any waterflow alarm device, be thoroughly familiar with:
NFPA 72: Installation, Maintenance and Use of Local Protective Signalling Sys-
tems
NFPA 13: Installation of Sprinkler Systems, specifically Section 3.17
NFPA 25: Inspection, Testing and Maintenance of Sprinkler Systems, specifically
Chapters 4 and 5, and Section 5.3.3.2
NFPA 13D: Standard for Residential Dwellings
NFPA 13R: Standard for Multifamily Dwellings
FIGURE 2. ASSEMBLY DIAGRAM
COVER
FLOW
COVER TAMPER
SWITCH (OPTIONAL P/N CTS)
TIMER
ASSEMBLY
(P/N FS-RT)
GASKET
ACTUATOR
LEVER
WATERFLOW
GROUND SCREW
MOUNTING
PLATE
PADDLE
1" NPT
THREAD
TAMPER PROOF
WRENCH (P/N WFDW)
FILISTER HEAD
SCREW
SPECIFICATIONS
Contact Ratings: 10 A @ 125/250 VAC ; 2.5 A @ 24 VDC
Triggering Threshold Bandwidth (Flow Rate): 4 to 10 GPM
Static Pressure Rating: 250 PSI (Max.)
Dimensions (Installed): 4in H x 3½ in W x 6¾ in D
Operating Temperature Range: 32°F to 150°F (0°C to 66°C)
Shipping Weight: 2 lbs
Enclosure Rating: NEMA 4
U. S. Patent Number: 5,213,205
I56-4044-E
W038801
W039000
APPROXIMATE TEE DEPTH REQUIREMENTS (SEE FIGURE 1)
Tee Depth Threaded Sweat
CPVC NIBCO/
SPEARS
(no insert)
CPVC
SPEARS
(with insert)
CPVC/Tyco
1 × 1 × 1" 21/8" 13/4" 21/8" 215/32" 213/16"
11/4× 11/4× 1" 21/2" 21/8" N/A N/A N/A
11/2× 11/2× 1" 23/4” 21/4" 3" 3" N/A
2 × 2 × 1" 31/4" 23/4" N/A N/A N/A
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Other applicable NFPA standards, local codes and the requirements of the authority
having jurisdiction.
Failure to follow these directions may result in failure of the device to report a water-
flow condition. 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 removal and a
clear view of it for inspection. See Figure 1 for mounting dimensions.
2. Locate the detector 6 to 7 feet above the floor to protect from accidental damage.
3. On horizontal runs, position the detector on top or side of the pipe. Do not
mount it upside down.
4. Mount detector at least 6 inches from a fitting which changes the direction of
the waterflow, or no less than 24 inches 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 3.
MOUNTING INSTRUCTIONS
1. This WFDTNRN waterflow detector is designed to fit only the appropriate tee
fitting.
NOTE: The outlet branch of tee must have a 1-inch NPT thread. Do not use a
reducer to achieve the correct thread size. Failure to follow this instruction will
result in failure of the detector to report a waterflow condition.
2. WFDT units are shipped without the paddles mounted to the actuator. Select the
correct size paddle for the tee being used the appropriate nominal pipe diam-
eter size is molded on the surface of the paddles. Align hole on stem of paddle
with hole on actuator lever. Fasten together using a #4-40 x 3/8-inch fillister head
screw supplied in bag assembly. See Figure 2. Use only the screw provided with
the WFDTNRN. Drive screw head through hole in paddle until it seats firmly
to actuator lever surface. No washer is required. For paddle replacement refer to
Maintenance section.
3. Thread detector onto tee fitting and tighten with wrench. Use of thread seal-
ant or tape is recommended. Use height gage (located at end of paddle tree) to
ensure proper depth of detector on tee fitting. See Figure 1. Height gage must fit
between top of tee fitting and under side of hex tee adapter. A gap between gage
and tee adapter is acceptable. When correctly installed, the detector must face
in the proper direction of waterflow and be aligned with the pipe, the provided
directional cover illustrates flow direction for device.
4. Remove the plastic cover with the tamper proof wrench provided. Move the ac-
tuator 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 and directional cover points in the correct direc-
tion, otherwise a waterflow condition will go unreported. See Figure 3.
FIGURE 3. DIRECTIONAL COVER
OPERATIONAL TESTING
Always notify a central station monitoring waterflow alarms before repairing, main-
taining, or testing waterflow alarm devices.
1. Fill the fire sprinkler system and check for leaks around the WFDTNRN. If it
leaks, check to see that the fittings are tight. If leak persists, drain the system and
remove the detector (see removal instructions under Maintenance). Check for
damaged threads or cracked fitting. Reinstall detector and check again for leaks.
Do not proceed until all leaks have been stopped.
2. With cover removed, connect an ohmmeter or continuity tester across (COM and
B-NO) terminal switch contacts. The ohmmeter should show an open circuit, no
continuity (when the red switch buttons are depressed).
3. Deflect the actuator lever to release the switch buttons. The ohmmeter or conti-
nuity tester should show a short circuit when the switch buttons are released.
4. Open the inspector’s test valve to allow the detector to indicate a flow condition.
The detector should remain activated until the inspector’s test valve is closed.
Air pockets in the sprinkler system may prevent the detector from firing im-
mediately.
5. Replace the cover and tighten the security screws with the tamper proof wrench.
Store wrench is a secure place.
FIELD WIRING
1. The WFDTNRN has two SPDT switches. Switch contacts (COM and B-NO) are
closed when water is flowing and open when water is not flowing. Connect the
switches as shown in Figure 4 depending on the application.
2. When connected to a listed sprinkler/fire alarm control panel, the initiating cir-
cuit must be be unable to be silenced.
3. A ground screw is provided with all WFDTNRN units. When grounding is re-
quired, 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.
NOTCHED COVER INDICATES FLOW DIRECTION AT A
DISTANCE FROM MULTIPLE VIEWING ANGLES
W038200
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FIGURE 4. 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
MAINTENANCE
To prevent accidental water damage, control valves should be shut tightly and the
system completely drained before waterflow detectors are removed or replaced.
Inspect detectors in accordance with applicable NFPA codes and standards and/or
the authority having jurisdiction for leaks, and replace if leaks occur. Test detectors
at least quarterly as described in Operational Testing to insure proper operation. Test
more often if required by the authority having jurisdiction.
Under normal conditions Safe Signal waterflow detectors should provide years of
trouble-free service. However, if the switch enclosure becomes faulty, request Part No.
FS-RT and ensure timer is set to zero. If damage occurs to paddle, order replacement
kit. Refer to procedure below for removal of detector on pipe. Do not repair or replace
any other waterflow detector components in the field. If any other part of the detector
does not perform properly, replace the entire detector. Failure to follow this instruc-
tion 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. Unscrew WFDTNRN from tee fitting
FIGURE 5.
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, following the instructions in Chapter 5 of NFPA
Standard 13A.
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.
WARNING
THE LIMITATIONS OF WATERFLOW ALARM DEVICES
3. Vane-type waterflow detectors have a normal service life of 10-15 years. Hard water systems,
however, may substantially reduce waterflow detector service life.
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.
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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