System Sensor WFDT and WFDTH Product Manual

System Sensor WFDT and WFDTH Product Manual
I56-0480-013R
INSTALLATION AND MAINTENANCE INSTRUCTIONS
WFDT/WFDTH Vane-type Waterflow Detectors
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
Specifications
Contact Ratings:
Triggering Threshold Bandwidth (Flow Rate):
Static Pressure Rating:
Dimensions, Installed:
Operating Temperature Range:
Shipping Weight:
Enclosure Rating:
Two sets of SPDT (Form C); 10 A @ 125/250 VAC
; 2.5 A @ 24 VDC
4 – 10 GPM
250 PSI (Max.)
WFDT – 45⁄16 in H × 33⁄4 in W × 63⁄4 in D; WFDTH – 45⁄16 in H × 39⁄16 in W × 63⁄4 in D
32°F to 120°F (0°C to 49°C)
2.6 lbs
WFDT – NEMA Type 4, as tested by Underwriters Laboratories, Inc. (UL) (IP56)
WFDTH – Indoor use only, as tested by UL (IP10)
The WFDTH can be installed between 2×4 stud wall construction.
U.S. Patent Number:
5,213,205
Important
Please Read Carefully And Save
Figure 1. Mounting dimensions:
33/4˝
(WFDT)
39/16˝
(WFDTH)
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
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 off or damage the mechanism. Do not use
in potentially explosive atmospheres. Do not leave unused wires exposed.
3˝
45/16˝
Principles of Operation
Vane-type waterflow detectors mount to water filled pipes in sprinkler systems. Water flow in the pipe deflects a vane. Deflection of the vane produces
a switched output, usually after a specified delay.
TEE
ADAPTER
All WFDTs have a pneumatically controlled mechanical delay mechanism. Delays are noncumulative; they reset if the flow of water stops before the entire
delay has elapsed. 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.
INSTALLATION GAGE
END OF PADDLE TREE MUST
FIT BETWEEN TOP OF TEE
AND BOTTOM OF FLANGE
Compatible Pipe Tees/Risers
The WFDT and WFDTH fit 1- to 11⁄2-inch NPT threaded ferrous and brass,
1- to 2-inch sweat brass, 11⁄2-inch polybutylene plastic and 1-inch pvc plastic
tees having a 1-inch threaded NPT branch (see Figure 1 and chart for recommended tee depths). For 2-inch cast and malleable threaded tees use 2-inch
paddle (p02-0023-000) provided. The WFDT and WFDTH also fits 1-, 11/2-,
and 2-inch Reliable riser manifolds when used with paddle tree P02-0103-000
(purchased seperately). Use 1-inch CPVC paddle when installing detector on a
NIBCO 1-inch slip x 1-inch slip x 1-inch FPT.
TEE DEPTH
REFER TO TEE
DEPTH TABLE
PLASTIC VANE
W0126-00
Installation Guidelines
APPROXIMATE TEE DEPTH REQUIREMENTS (SEE FIGURE 1)
Before installing any waterflow alarm device, be thoroughly familiar with:
Tee Depth
Threaded
Sweat
Poly B
CPVC
CPVC/Spears/
Victaulic
CPVC/Tyco
1 × 1 × 1˝
1 /4 × 11/4 × 1˝
11/2 × 11/2 × 1˝
2 × 2 × 1˝
21/8˝
21/2˝
23/4˝
31/4˝
13/4˝
21/6˝
21/4˝
23/4˝
N/A
N/A
21/2˝
N/A
21/4˝
N/A
N/A
N/A
215/32˝
N/A
N/A
N/A
213/16˝
N/A
N/A
N/A
1
N770-05-00
TEE FITTING
NFPA 72:
NFPA 13:
NFPA 25:
National Fire Alarm Code
Installation of Sprinkler Systems
Inspection, Testing, and Maintenance of Water-based Fire Protection Systems, Section 5.3.3.2
NFPA 13D: Standard for 1 and 2 Family Dwellings and Manufactured Homes
NFPA 13R: Standard for Multi-family Dwellings
Also, follow other applicable NFPA standards, local codes and the requirements of the authority having jurisdiction.
1
I56-0480-013R
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.
3.Carefully roll the vane opposite the direction of flow and insert through
tee. Thread detector onto tee fitting and tighten with wrench. Use of
thread sealant 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.
4.Remove the metal cover. Move the actuator lever back and forth to check
for binding. If the vane binds, remove the detector and correct the problem before proceeding.
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 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
of it. 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 6 inches from a fitting which changes the direction of the water flow, or no closer than 24 inches from a valve or drain.
5.BE SURE DIRECTION-OF-FLOW ARROW MATCHES ACTUAL DIRECTION OF FLOW IN THE PIPE.
Figure 2. Assembly diagram:
COVER
CAUTION
Be sure the direction-of-flow arrow points in the right direction, otherwise a
waterflow condition will go unreported. See Figure 2.
Preoperation Testing
1.Fill the sprinkler system with water and check for leaks around the
WFDT or WFDTH. If there is a leak, 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 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) terminal switch contacts. 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
TAMPER
PROOF
WRENCH
(P/N WFDW)
COVER TAMPER
SWITCH
DELAY
MECHANISM
(P/N 546-7000)
TERMINAL BLOCK
(P/N A3008-00)
(REPLACEMENT P/N
A77-01-02)
GASKET
GROUND SCREW
(WFDT ONLY)
(GREEN)
FLOW
ACTUATOR
LEVER
WATERFLOW
1˝ NPT
THREAD
WARNING
MOUNTING
PLATE
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.
PADDLE
(P/N PRK9)
When utilizing switches at voltages greater than 74VDC
or 49VAC
means to provide all–pole disconnection must be incorporated in the fixed
wiring, such as a circuit breaker.
FILLISTER
HEAD SCREW
1.The WFDT and WFDTH have 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 3 depending on the
application.
2.When connected to a listed sprinkler/fire alarm control panel, the initiating circuit must be non-silenceable.
3.A ground screw is provided with all units. When grounding is required,
clamp wire with screw in hole located between conduit entrance holes.
See Figure 2.
W0127-00
Mounting Instructions
1.The WFDT and WFDTH waterflow detectors are designed to fit only the
appropriate tee fitting.
NOTE: Leg of tee perpendicular to flow of water 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 and WFDTH units are shipped without paddles mounted to the
actuator. Select the correct size paddle for the type of tee being used.
Align hole on stem of paddle with hole on actuator lever. Fasten together
using a #4-40×1⁄4-inch fillister head screw supplied in bag assembly. See
Figure 2. Use only the screw provided with the unit. Drive screw head
through hole in paddle until it seats to actuator lever surface. No washer
is required. For paddle replacement refer to Maintenance section.
N770-05-00
2
I56-0480-013R
Maintenance
To prevent accidental water damage, control valves should be shut tightly
and the system completely drained before waterflow detectors are removed
or replaced.
Figure 3. Field wiring:
NOTE: COMMON AND B-NO
CONNECTIONS WILL CLOSE
WHEN VANE IS DEFLECTED, I.E.,
WHEN WATER IS FLOWING. DUAL
SWITCHES PERMIT
APPLICATIONS TO BE COMBINED
ON A SINGLE DETECTOR.
SSM24-X
SSV120-X
UL LISTED
COMPATIBLE
CONTROL PANEL
POWER +
24VDC OR
120VDC –
INITIATING
LOOP
+
Inspect detectors in accordance with applicable NFPA codes and standards
and/or the authority having jurisdiction for leaks. Test detectors at least quarterly as described under Operational Testing above to insure proper operation.
This device is not designed for use on “dry pipe” systems. Test more often if
required by the authority having jurisdiction.
CONTACT RATINGS
125/250 VAC 10 AMPS
24 VDC
2.5 AMPS
SUGGESTED EOL
RESISTOR
–
SCHEMATIC OF
INDIVIDUAL
SWITCH IN
“NO WATERFLOW”
CONDITION
A-NC
Under normal conditions System Sensor waterflow detectors should provide
years of trouble-free service. If, however, the delay mechanism becomes faulty,
replacement kits are available. To replace the delay mechanism, request Part
No. A3008-00; for switch enclosure, request Part No. A77-01-02. Complete
instructions are enclosed with each. Either mechanism can be easily replaced
without removing the detector from the pipe or draining the pipe. 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 detector components in the field. If any other part of the detector 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.
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.
W0356-00
Mechanical Delay Adjustment
The pneumatic delay is preset at 30 seconds 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 adjusted over
a range from 0-90 seconds. See Figure 4.
Proceed as follows to remove a detector.
1.
2.
3.
4.
NOTE: Set the delay to the minimum required to prevent false alarms due to
flow surges.
Drain the pipe.
Turn off electrical power to the detector, and then disconnect wiring.
Unscrew WFDT or WFDTH from tee fitting.
Lift detector clear of pipe.
CAUTION
After extended service, parts of the detector may become worn reducing the
delay time and causing false alarms. If this happens, increase the delay. If the
delay is already at maximum, replace the mechanical delay assembly. Refer to
Maintenance section for ordering replacement parts.
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.
Operational Testing
Always notify a central station monitoring waterflow alarms before repairing,
maintaining or testing waterflow alarm devices.
1.Replace the cover and tighten the security 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 inspector’s test valve is closed. Air pockets in the sprinkler system
may increase the apparent time delay.
Figure 4. Delay adjustment dial:
DIAL IS AP
ON LAY IN SE PRO
R
E
CO XIM
ND A
BE E D
M IM
S
T
TE
0
NU
DELAY
ADJUSTMENT
DIAL
70
15
55
30
45
NOTE: RETARD TIME MAY EXCEED 90 SECONDS. ADJUST
AND VERIFY THAT TIME DOES NOT EXCEED 90 SECONDS.
NUMBER ON DIAL IS APPROXIMATE TIME DELAY IN
SECONDS WITH AN ACCURACY OF +/− 50%.
W0112-02
N770-05-00
3
I56-0480-013R
Please refer to insert for the Limitations of Fire Alarm Systems
WARNING
The Limitations of Waterflow Alarm Devices
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.
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
System Sensor warrants its enclosed waterflow detector to be free from defects 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, 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 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 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, Return
N770-05-00
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 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.
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I56-0480-013R
©2007 System Sensor
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