Hitachi RCI-1.0FSN4 - Removing Coupling (Except for RPC-1.5 and 2.0 FSN3)

9 Servicing
RPC-(1.5-6.0)FSN3 - Ceiling type
SMGB0099 rev.0 - 12/2016
285
9
Notes for Mounting Bearing
Mount the xing plate for a ange bearing according to the following notes:
• Align the shaft centers of the ange 1 and ange 2.
• Insert washers between the anges.
• The tightening torque for bolts shall be 6N-m. This indoor unit utilizes the self-aligning bearing which enables the
self-alignment by reducing the alignment torque for the bearing. Therefore, if the tightening work is not performed
correctly, an abnormal noise may occur.
• Check that only the bearing body rotates and moves with the bolts tightened.
ۑ

The centers of the ange 1
and 2 are out of alignment
Flange 1
Flange 2
Washer
Washer
Shaft
Bearing
9.5.6 Removing Coupling (Except for RPC-1.5 and 2.0FSN3)
1 Open the air inlet grille downward according to “9.5.1 Removing
Air Filter and Air Inlet Grille”.
2 Remove the lower casing according to “9.5.4 Removal of the fan
motor”.
3 Loosen 2 xing screws for the coupling with a hexagon wrench
and shift the coupling to the fan motor according to “9.5.4
Removal of the fan motor”.
4 Shift the shaft to the plate in the direction of the arrow (
1
). Then
remove the coupling from the fan motor (
2
).
1
2
Notes for Remounting Coupling
• Tighten the xing screws, inserting them into the grooves on the shaft.
• Pay attention to the insertion direction of the coupling because the diameters of the shaft and the motor shaft are
different.
• The coupling shall be located 24mm away from the fan motor.
Coupling
Fan MotorShaft
φ15
φ12
24
Tighten the fixing screws,
inserting them into the grooves on the shaft.
Tighten the xing screws, inserting them into
the grooves on the shaft
Fan motor
Coupling
Shaft