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<Installation procedures>
1) Remove the pipes attached to the flow switch.
Note: The unit is shipped with the pipes loosely tightened.
2) Wrap seal tape around the threads at the end of the pipes, starting at the 1.5th or 2nd thread, and not over the
openings. Apply two to three wraps in the direction of the pipe threads (clockwise). Each course of the tape
should overlap the one before it by 2/3 to 3/4 the width of the tape. Run your fingers around the threads and
tape to press the tape into the threads.
Then, attach the pipes to the flow switch, holding parts A and B with a spanner. The maximum tightening torque
is 60 N•m (611 kgf•cm).
3) Attach the flow switch and pipes to the water outlet in the horizontal position.
The angle of the axis of the pipe should be less than 45 degrees.
Check the direction of the flow switch as shown in Fig. C.
4) Connect the flow switch wire to IN1 of TB142A.
From the External Wiring Input, route the wire as shown in Fig. D and connect it to the terminal as shown in Fig.
E. Use a wire protector such as a rubber bushing in the access hole on the unit.
A
B
Water Outlet
OK
OK
OK
OK
OK
OK
45°
45°
Not Acceptable
Not Acceptable
Not Acceptable
Not Acceptable
1)
2)
3)
Check the direction.
4)
Fig. C
Secure the
wiring in place.
Secure the
wiring in place.
Enlarged view
Enlarged view
Fig. D
Fig. E
Flow Switch
Wire
Rubber bushing
Rubber bushing
