Mitsubishi Electric City Multi PWFY-P36NMU-E-BU Data Book page 61

15. INSTALLATION
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.
1)
3 )
Water Outlet Water Outlet
4 )
MEES20K028
2 )
Wire Wire
Flow Switch Flow Switch
Fig. C
Check the direction. Check the direction.
Rubber bushing Rubber bushing Rubber bushing
Fig. D
A A
OK OK OK
Not Acceptable Not Acceptable Not Acceptable
OK OK OK
Not Acceptable Not Acceptable Not Acceptable
Enlarged view Enlarged view Enlarged view
Secure the Secure the Secure the
wiring in place. wiring in place. wiring in place.
AIR TO WATER
B B
45° 45° 45°
OK OK OK
Fig. E
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