D770-53-00
2
I56-2617-001R
CAUTION
When drilling out hole, make certain that center of hole saw cut does not
remain in pipe.
3. Remove burrs and sharp edges from hole. Clean out scale and foreign mat-
ter from inside wall of pipe to ensure free movement of the vane. Clean the
outside of the pipe to remove dirt, metal chips, and cutting lubricant.
4. Seat the saddle gasket against the saddle and mount detector directly
to pipe. Carefully roll the vane opposite the direction of flow and in-
sert 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 around the pipe. Thread both nuts onto the U-bolt
and tighten them alternately to ensure a uniform seal. See Table 2 for
torque values.
6. Remove the metal 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 direction, other-
wise a waterflow condition will go unreported. See Figure 3.
Preoperation Testing
1. Fill the sprinkler system and check for leaks around the WFDE. If it
leaks, first check for proper torque on U-bolt nuts. If leak persists,
drain the system and remove the detector (see removal instructions
under Maintenance). Check for dirt or foreign objects under the gasket.
Check that 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 (COM and B) ter-
minal switch contacts (see Figure 4). 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
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.
When utilizing switches at voltages greater than 74VDC or
49VAC means to provide all–pole disconnection must be incorporated
in the field wiring, such as a circuit breaker.
1. All models have two SPDT switches. Switch contacts (COM and B) are
closed when water is flowing and open when water is not flowing. Con-
nect the switches as shown in Figure 4 depending on the application.
2. When connected to a listed sprinkler/fire alarm control panel, the ini-
tiating circuit must be non-silenceable.
3. A ground screw is provided with all WFDE units. When grounding
is required, clamp wire with screw in hole located between conduit
entrance holes. See Figure 5.
4. Use proper waterproof conduit fittings where required.
5. A 22.2 mm conduit hole is provided for electrical connection. An additional
22.2 mm diameter knockout is provided for multiple line connections.
Mechanical Delay Adjustment
The pneumatic delay is preset at dial setting 25 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 ad-
justed over a range from 0 to 30 seconds maximum. See Figure 6 (page 4).
NOTE:
Set the delay to the minimum required to prevent false alarms due
to flow surges.
After extended service, parts of the detector may become worn reducing the
delay time and causing false alarms. If this happens, increase the delay.
Figure 2. Location of mounting hole:
Figure 1. Mounting dimensions:
W0105-00
W0106-00
Table 2:
7.6 cm
(3
˝)
9.5 cm
(3-3/4˝)
Pipe saddle
U-bolt nut
Plastic vane
Pipe
U-bolt
Overall width = pipe di 7.6 cm (3˝)
Pipe diameter
plus 13.3 cm
(5-1/4˝)
Wrong
Right
Remove burrs from edge of hole. Clean out scale
and foreign matter from inside wall of pipe.
MODEL
NUMBER
HOLE
DIAMETER
TORQUE
SETTING
WFD20E
31.8 mm +1.6 mm
1-1/4 in. +1/16 in
40.7 - 47.5 NT-M
30 - 35 FT-LBS
WFD25E
WFD30-2E
50.8 mm + 1.6 mm
2 in. +1/16 in.
74.6 - 81.3 NT-M
55 - 60 FT-LBS
WFD40E
WFD60E
WFD80E
