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 diameter 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
direction or else water flow 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")
UBOLT
NUT
PIPE
SADDLE
UBOLLT
PIPE
FIGURE 2. MOUNTING HOLE LOCATION:
WRONG
RIGHT
REMOVE BURRS FROM EDGE OF HOLE. CLEAN OUT SCALE
AND FOREIGN MATTER FROM INSIDE WALL OF PIPE.
W0106-00
TABLE 1:
WFDNA 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.
SS-200-035 2 I56-4175-002
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 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:
WATERF
LOW
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 ground-
ing 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
