3. Remove burrs and sharp edges from the hole. Clean and remove all scale and
foreign matter from the inside of the pipe for a distance equal to the pipe diam-
eter on either 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.
4. Seat the 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 (see Figure 3). 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 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 cause before proceeding.
CAUTION
Be sure the direction-of-flow arrow and directional cover point in the correct direc-
tion or else waterflow will go unreported. See Figure 3 and Figure 6.
FIGURE 1. MOUNTING DIMENSIONS
8.9 CM
(3.5")
6.6 CM
(2.6")
PIPE DIAMETER
PLUS 12.7 CM
(5")
PIPE
VANE
OVERALL WIDTH = PIPE DI 6.4 CM (2.5")
U-BOLT
NUT
PIPE
SADDLE
U-BOLT
PIPE
FIGURE 2. MOUNTING HOLE LOCATION
W RO NG
RIG HT
REM O VE BURRS FRO M EDG E O F HO LE. CLEAN O UT SCALE
AND FO REIG N M ATTER FRO M INSIDE W ALL O F PIPE.
W0106-00
TABLE 1.
WFDN MODEL
HOLE SIZE (IN)
TORQUE
20, 25
1
1
/
4
30–35 ft.-lb.
40
2
45–50 ft.-lb.
30, 50, 60, 80
2
60-65 ft.-lb
PRE-OPERATION TESTING
1. Fill the fire 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 per-
sists, 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
WATERFL
OW
U-BOLT
PIPE
SADDLE GASKET
REFER TO
TABLE 1
U-BOLT
NUT
ELECTRICAL
CONDUIT
ENTRANCE
COVER
TAMPER PROOF
WRENCH
(P/N WFDW)
ROLL PADDLE
OPPOSITE OF
FLOW ARROW
WHILE INSERTING
PIPE SADDLE
MOUNTING PLATE
TIMER
(REPLACEMENT
P/N FS-RT)
COVER TAMPER
SWITCH
(OPTIONAL P/N CTS)
W0392-00
FIELD 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 7, depending on the application.
2. When connected to a listed fire sprinkler/fire alarm control panel, the initiating
circuit must be unable to be silenced.
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 4.
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 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.
W0384-00
2
I56-4045-E
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