Removing Coupling (Except For Rpc-1.5 And 2.0Fsn3) - Hitachi RCI-1.0FSN4 Service Manual

9 Servicing
RPC-(1.5-6.0)FSN3 - Ceiling type
Notes for Mounting Bearing
Mount the fixing plate for a flange bearing according to the following notes:
• Align the shaft centers of the flange 1 and flange 2.
• Insert washers between the flanges.
• 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.

9.5.6 Removing Coupling (Except for RPC-1.5 and 2.0FSN3)

1 Open the air inlet grille downward according to
Air Filter and Air Inlet Grille".
2 Remove the lower casing according to
motor".
3 Loosen 2 fixing screws for the coupling with a hexagon wrench
and shift the coupling to the fan motor according to
Removal of the fan motor".
4 Shift the shaft to the plate in the direction of the arrow (
remove the coupling from the fan motor (
Notes for Remounting Coupling
• Tighten the fixing 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.
285 SMGB0099 rev.0 - 12/2016
Shaft
Washer
Bearing
"9.5.1 Removing
"9.5.4 Removal of the fan
"9.5.4
1
). Then
2
).
Shaft
Shaft
Coupling Coupling
Tighten the fixing screws,
Tighten the fixing screws, inserting them into
inserting them into the grooves on the shaft.
the grooves on the shaft
Flange 1
Washer
Flange 2
The centers of the flange 1
and 2 are out of alignment
24
Fan Motor
Fan motor
1
2
9