Pittway System Sensor WFDTNR User manual

N770-06-00 1 I56-509-02R
WFDTNR Vane-type
Waterflow Detector
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: [phone]
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 oth-
ers must leave this manual or a copy of it with the user.
Read all instructions carefully before beginning.
CAUTION
Use vane-type waterflow detectors in wet-pipe systems
only. DO NOT USE IN DRY-PIPE, DELUGE, OR PRE-AC-
TION SYSTEMS. The sudden inrush of water in such sys-
tems may break the vane off 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 wet-pipe systems
only. Water flow in the pipe deflects a vane. Deflection of
the vane produces a switched output. All detectors will ac-
tivate 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
Model WFDTNR fits 1"–11/2"NPT threaded ferrous and
brass, 1"- 2"sweat brass, 11/2"polybutylene plastic and 1"
pvc plastic tees having a 1"threaded NPT branch (see Fig-
ure 1 and chart for recommended tee depths).
Installation Guidelines
Before installing any waterflow alarm device, be thor-
oughly familiar with:
NFPA 72: Installation, Maintenance and Use of Local
Protective Signalling Systems
Specifications
Contact Ratings: 10 A @ 125/250 VAC
2.5 A @ 24 VDC
Triggering Threshold Bandwidth (Flow Rate): 4 - 10 GPM
Static Pressure Rating: 250 PSI (Max.)
Dimensions, Installed: 31/4"H ×31/4"W×41/4"D
31/4"above pipe tee
Operating Temperature Range: 32°F - 120°F (0°C - 49°C)
Shipping Weight: 1.5 lbs.
NFPA 13: Installation of Sprinkler Systems, specifically
Section 3.17
NFPA 25: Inspection, Testing and Maintenance of Sprin-
kler Systems, specifically Chapters 4 and 5
NFPA 13D: Standard for Residential Dwellings
NFPA 13R: Standard for Multifamily Dwellings
Other applicable NFPA standards, local codes and the re-
quirements 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
A78-2110-01
Figure 1. Mounting dimensions:
Approximate Tee Depth Requirements
(See Figure 1)
Tee Depth Threaded Sweat Poly B CPVC
1 ×1 ×1″
1
1
/ 4 ×1
1
/ 4 ×1″
1
1
/ 2 ×1
1
/ 2 ×1″
2 ×2 ×1"
2
1
/ 8 ″
2
1
/ 2 ″
2
3
/ 4 ″
N/A 2
3
/ 4 ″
2
1
/ 4 ″
2
1
/ 6 ″N/A
2
1
/ 2 ″N/AN/A N/A
N/A
1
3
/ 4 ″N/A 2
1
/ 4 ″CPVC/Spears CPVC/Central
N/A
N/A N/AN/A N/A
N/A
2
15
/ 32 ″2
13
/ 16 ″
3 1/4"
1 3/4"
3 1/4" HEX TEE ADAPTOR
INSTALLATION
GAGE (END OF
PADDLE TREE)
MUST FIT
BETWEEN TOP
OF TEE AND
BOTTOM OF HEX
TEE ADAPTOR
FLANGE.
PIPE TEE FITTING
PLASTIC VANE
"TEE DEPTH"
REFER TO
TEE DEPTH
TABLE
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N770-06-00 2 I56-509-02R
not responsible for devices that have been improperly in-
stalled, tested or maintained.
1. Mount the detector where there is adequate clearance
for installation and removal and a clear view of it for in-
spection. See Figure 1 for mounting dimensions.
2. Locate to protect from damage, 6-7 feet above the floor.
3. On horizontal runs, position the detector on top of the
pipe or on the side. Do not mount it upside down.
4. Mount detector at least 6 inches from a fitting which
changes the direction of the water flow.
5. BE SURE DIRECTION-OF-FLOW ARROW MATCHES AC-
TUAL DIRECTION OF FLOW IN THE PIPE.
Mounting Instructions
1. This WFDTNR waterflow detector is designed to fit only
the appropriate tee fitting.
NOTE: Leg of tee perpendicular to flow of water must
have a 1"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 be-
ing used the appropriate nominal pipe diameter size is
molded on the surface of the paddles). Align hole on
stem of paddle with hole on actuator lever. Fasten to-
gether using a #4-40 x 1/4"fillister head screw supplied
in bag assembly. See Figure 2. Use only the screw pro-
vided with the WFDTNR. 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
A78-2111-00
Figure 2. Assembly diagram:
COVER
GROUND
SCREW
(GREEN)
MOUNTING
PLATE
TAMPER PROOF
WRENCH (P/N WFDW)
PADDLE
FILLISTER
HEAD SCREW
1" NPT THREAD
WATER FLOW
ACTUATOR
ASSEMBLY
FLOW
ACTUATOR
LEVER
wrench. Use of thread sealant or tape is recommended.
Use height gage (located at end of paddle tee) 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 de-
tector must face in the proper direction of waterflow and
be aligned with the pipe.
4. Remove the plastic 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 di-
rection, otherwise a waterflow condition will go unre-
ported. See Figure 2.
Operational Testing
Always notify a central station monitoring waterflow
alarms before repairing, maintaining, or testing waterflow
alarm devices.
1. Fill the sprinkler and check for leaks around the
WFDTNR. 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 continu-
ity tester across (COM and B) terminal switch contacts.
The ohmmeter should show an open circuit, no continu-
ity (when the red switch buttons are depressed).
3. Deflect the actuator lever to release the switch buttons.
The ohmmeter or continuity 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 immediately.
5. Replace the cover and tighten the security screws with
the tamper proof wrench. Store wrench is a secure place.
Field Wiring
1. The WFDT has two SPDT switches. Switch contacts
(COM and B) are closed when water is flowing and open
when water is not flowing. Connect the switches as
shown in Figure 3 depending on the application.
2. When connected to a listed sprinkler/fire alarm control
panel, the initiating circuit must be non-silenceable.
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N770-06-00 3 I56-509-02R
3. A ground screw is provided with all WFDT units. When
grounding is required, clamp wire with screw in hole lo-
cated between conduit entrance holes. See Figure 2.
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.
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 monthly for leaks. Test detectors at least
monthly as described under Operational Testing to insure
proper operation. This device is not designed for use on
“dry pipe”systems. Test more often if required by the au-
thority having jurisdiction.
Figure 3. Field wiring:
Strip Gauge
Switch 1
COM
COM
ABBA Switch 2
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
WFDTNR
BB
COM COM
WFDTNR
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
T
yp
ical 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.
Under normal conditions System Sensor waterflow detec-
tors should provide years of trouble-free service. If, how-
ever, the switch enclosure becomes faulty, request Part No.
A77-01-08. If damage occurs to paddle, order replacement
kit PRK9. Refer to procedure below for removal of detector
on pipe. Do not repair or replace any other waterflow de-
tector components in the field. If any other part of the de-
tector does not perform 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 dis-
connect wiring
3. Unscrew WFDTNR from tee fitting
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N770-06-00 4 I56-509-02R
© System Sensor 2000
Three-Year Limited Warranty
System Sensor warrants its enclosed waterflow detector to be free from de-
fects in materials 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 waterflow detector. No agent, representa-
tive, dealer, or employee of the Company has the authority to increase or
alter the obligations or limitations of this Warranty. The Company’s obli-
gation of this Warranty shall be limited to the repair or replacement of any
part of the waterflow detector which is found to be defective in materials
or workmanship under normal use and service during the three year pe-
riod commencing with the date of manufacture. After phoning System
Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authori-
zation number, send defective units postage prepaid to: System Sensor,
Repair 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 repair or 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 negli-
gence or fault. Some states do not allow the exclusion or limitation of inci-
dental 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, following the instructions in Chapter 5 of NFPA
Standard 13A.
2. Alarms generated by the activation of waterflow detec-
tors 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
WARNING
The Limitations of Waterflow Alarm Devices
of 10-15 years. Hard water systems, however, may re-
duce waterflow detector service life to 4 or 5 years.
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 sys-
tem 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 posi-
tion. The normally open position should be monitored
by a sprinkler supervisory switch.
Please refer to insert for the Limitations of Fire Alarm Systems
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