Product Manual - System Sensor

I56-1452-005R
INSTALLATION AND MAINTENANCE INSTRUCTIONS
WFDEXP Explosion Proof
Vane-type Waterflow Detectors
Specifications
Contact Ratings:
Triggering Threshold Bandwidth (Flow Rate):
Static Pressure Rating:
Dimensions (Installed):
Operating Temperature Range:
Compatible Pipe:
Shipping Weight:
Enclosure Rating:
Hazardous Atmosphere Classification:
US Patent Number:
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
10 A @ 125/250 VAC
; 2.5 A @ 24 VDC
4 to 10 gpm
See models listed below
4.0 in H × 8.8 in W × 7.0 in D
32°F to 120°F (0°C to 49°C)
Steel water pipe, schedule 10 or 40
According to size
NEMA 4 indoor/outdoor use
Class I, Groups B, C, D Div, 1; Class II, Groups E, F, G Div. 1; Class III Div. 1
5,213,205
Important
Please Read Carefully And Save
Installation Guidelines
Before installing any waterflow alarm device, be thoroughly familiar with:
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.
NFPA 72: National Fire Alarm Code
NFPA 13: Installation of Sprinkler Systems, Section 3.17
NFPA 25: Inspection, Testing and Maintenance of Sprinkler Systems, Section
5.3.3.2
Other applicable NFPA standards, local codes, and the requirements of the
authority having jurisdiction
Read all instructions carefully before beginning. Follow only those instructions that apply to the model you are installing.
CAUTION
Use vane-type waterflow detectors in wet-pipe systems only. Do NOT use
them in dry pipe, deluge, or preaction systems. The sudden inrush of water in
such systems may break the vane or damage the mechanism.
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 sprinkler system is activated by a fire. System Sensor is not responsible
for devices that have been improperly installed, tested, or maintained.
Principles of Operation
Vane-type waterflow detectors mount to water-filled pipes in sprinkler systems.
Waterflow in the pipe deflects a vane, which produces a switched output–
usually after a specified delay. All waterflow detectors have a pneumatically
controlled mechanical delay mechanism. Delays do NOT accumulate; they reset if the flow of water stops before the entire delay has elapsed. All switches
actuate when the water flow rate is 10 gallons per minute or greater, but will
not actuate if the flow rate is less than 4 gallons per minute. This System Sensor installation manual covers the following waterflow detectors for sprinkler/
fire alarm applications.
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 to protect from damage – 6 to 7 feet above the floor.
3.On horizontal runs, position the detector on the top or 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 the detector on pipe through which water flows upward.
Otherwise, the unit may not operate properly.
4.Mount the detector at least 6 inches from a fitting that changes the direction of water flow and no less than 24 inches from a valve or drain.
5. Be sure the direction-of-flow arrow matches the direction of flow in the pipe.
Model
Pipe Size
(inches)
Pipe
Schedule
Max. Pressure
Rating (psig)
WFD20EXP
2
10 thru 40
450
WFD25EXP
2.5
10 thru 40
450
WFD30-2EXP
3
10 thru 40
450
WFD35EXP
3.5
10 thru 40
450
WFD40EXP
4
10 thru 40
450
WFD50EXP
5
10 thru 40
450
WFD60EXP
6
10 thru 40
450*
WFD80EXP
8
10 thru 40
450*
CAUTION
Contact the appropriate personnel regarding the proper tools and procedures
when installing this device in a “HAZARDOUS” area. Disconnect supply circuits before opening the cover, to reduce the chances of ignition of hazardous
atmospheres. Secure the cover and cover screws prior to activating circuits.
Tighten cover screws to 40 in. lbs. min.
Mounting Instructions
1. Drain the pipe.
2.Cut a hole at 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. 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 1 for hole size.
*Maximum Pressure Rating 400 psig as approved by Factory Mutual Research.
CAUTION
Do NOT use any of the WFD models on copper pipe. The clamping forces of
the mounting bolts may collapse the pipe sufficiently to prevent the detector
from functioning properly.
CAUTION
When drilling the hole with a hole saw, make certain that the center of the cut
does not remain in the pipe.
Do NOT install steel or iron pipe sections in copper piping for mounting a
waterflow detector. Incompatibility between the dissimilar metals causes bimetallic corrosion.
3.Remove burrs and sharp edges from the hole. Clean and remove all scale
and foreign matter from the inside of the pipe for one diameter on each
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.
NOTE: Not for use in potable water systems, systems where sand or other
material is present or systems employing other than water.
D770-24-00
1
I56-1452-005R
Preoperation Testing
1.Fill the sprinkler system and check for leaks around the waterflow detector. If it leaks, first check for the proper torque on the U-bolt nuts. If the
leak persists, drain the system and remove the detector (refer to Maintenance). Check for dirt or foreign 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 the COM and B-NO
switch terminals. 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.
Figure 3. Assembly diagram:
4.Seat the O-ring or gasket against the saddle and mount the detector directly to the pipe. Carefully roll the vane opposite the direction of flow
and insert it through the hole. 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 1 for torque values.
6.Remove the metal cover with the tamper-proof wrench provided. Manually actuate the limit 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 points in the right direction or else water
flow will go unreported. See Figure 3.
Figure 1. Mounting dimensions:
6.75˝
COVER
4.019˝
5.019˝
TERMINAL BLOCK
(REPLACEMENT P/N A77-01-02)
PIPE
DIAMETER
PLUS 6.5˝
DELAY
MECHANISM
U-BOLT
NUT
PIPE
SADDLE
GROUND
SCREW
(REPLACEMENT P/N
A3008-00)
(GREEN)
CONDUIT
ENTERANCE
PIPE
PIPE SADDLE
U-BOLT NUT
PLASTIC VANE
U-BOLT
DIRECTION OF
FLOW ARROW
ROLL PADDLE (VANE)
OPPOSITE OF FLOW
ARROW WHILE INSERTING
PLASTIC
VANE
SADDLE
GASKET
W0238-00
Figure 2. Mounting hole location:
PIPE
HOLE SIZE
WRONG
(REFER TO TABLE 1)
U-BOLT
RIGHT
W0183-00
Wiring
1. All models have two SPDT switches. Switch contacts COM and B-NO
are closed when water is flowing and open when it is not. 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 circuit must be non-silenceable.
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 3.
4.If a second conduit entry is required, remove the plug using a hex wrench.
REMOVE BURRS FROM EDGE OF HOLE. CLEAN OUT SCALE
AND FOREIGN MATTER FROM INSIDE WALL OF PIPE.
WARninG
W0106-00
Table 1:
Wfd model
Hole size (in)
Torque
20, 25, 35
1
1 /4
30–35 ft.-lb.
30-2, 40, 50, 60, 80
2
55–60 ft.-lb.
D770-24-00
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 injury or death.
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.
2
I56-1452-005R
Figure 4. WFD wiring:
INITIATING
LOOP
+
–
SUGGESTED EOL
RESISTOR
CONTACT RATINGS
125/250 VAC 10 AMPS
24 VDC
2.5 AMPS
SCHEMATIC OF
INDIVIDUAL
SWITCH IN
“NO WATERFLOW”
CONDITION
A-NC
CAUTION
COM
If a vane breaks in a pipe, find and remove it. If it is not removed, the vane
may restrict the flow of water to all or part of the sprinkler system.
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.
Figure 5. Delay adjustment dial:
DELAY
ADJUSTMENT
DIAL
15
NOTE: Set the delay to the minimum required to prevent false alarms from
flow surges.
30
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 the maximum, replace the mechanical delay assembly.
Refer to Maintenance for ordering replacement parts.
TE
NU
W0356-00
Mechanical Delay Adjustment
The pneumatic delay is preset at the factory to 30 seconds. To adjust the setting, turn the adjustment dial clockwise to increase the delay, counterclockwise
to decrease it. The delay is adjustable from 0 to 90 seconds. See Figure 5.
DIAL IS AP
ON LAY IN SE PRO
R
E
CO XIM
ND A
BE E D
M IM
S
T
70
POWER +
24VDC OR
120VDC –
1. Drain the pipe.
2. Turn off electrical power to the detector and disconnect the wiring.
3. Loosen the nuts and remove the U-bolts.
4.Gently lift the saddle far enough to get your fingers under it. Then, roll
the vane so it will fit through the hole while continuing to lift the waterflow detector saddle.
5. Lift the detector clear of the pipe.
55
SSM24-X
SSV120-X
0
UL LISTED
COMPATIBLE
CONTROL PANEL
To remove a detector:
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.
Operational Testing
Always notify a central station monitoring waterflow alarms before repairing,
maintaining, or testing waterflow alarm devices.
45
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 inspector’s test valve is closed. Air pockets in the sprinkler system
may increase the apparent 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.
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%.
Inspect detectors in accordance with applicable NFPA 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 if required by the authority having jurisdiction.
W0112-02
Under normal conditions, System Sensor waterflow detectors should provide
years of trouble-free service. However, if the delay mechanism or switch enclosure needs to be replaced, follow these directions. To replace the delay
mechanism or switch enclosure, use a 3⁄16-inch socket head screwdriver to
remove the three screws that hold it in place. Either mechanism can be easily
replaced without removing the detector from the pipe or draining the pipe. To
replace the delay mechanism, request Part No. A3008-00. For switch enclosure, request Part No. A77-01-02. Do not repair or replace any other waterflow
detector components. If any other 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 associated sprinkler system is activated by a fire. System Sensor is not responsible for devices that have been improperly installed,
tested, or maintained.
D770-24-00
3
I56-1452-005R
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.
6.Unless all six cover screws are installed and tightened to 40 in. lbs. min., the hazardous location enclosure ratings will be voided.
Three-Year Limited Warranty
System Sensor warrants its enclosed waterflow detector to be free from defects in materiDepartment, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please include a
als and workmanship under normal use and service for a period of three years from date
note describing the malfunction and suspected cause of failure. The Company shall not
of manufacture. System Sensor makes no other express warranty for this waterflow detecbe obligated to repair or replace units which are found to be defective because of damage,
tor. No agent, representative, dealer, or employee of the Company has the authority to
unreasonable use, modifications, or alterations occurring after the date of manufacture.
increase or alter the obligations or limitations of this Warranty. The Company’s obligation
In no case shall the Company be liable for any consequential or incidental damages for
of this Warranty shall be limited to the repair or replacement of any part of the waterflow
breach of this or any other Warranty, expressed or implied whatsoever, even if the loss
detector which is found to be defective in materials or workmanship under normal use
or damage is caused by the Company’s negligence or fault. Some states do not allow the
and service during the three year period commencing with the date of manufacture.
exclusion or limitation of incidental or consequential damages, so the above limitation
After phoning System Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return
or exclusion may not apply to you. This Warranty gives you specific legal rights, and you
Authorization number, send defective units postage prepaid to: System Sensor, Repair
may also have other rights which vary from state to state.
D770-24-00
4
I56-1452-005R
© 2007 System Sensor