Hitachi RCI Service Manual page 297

10 Servicing
N O T E
Do not hold onto the motor when loosening the nut with a
wrench. The base of the transmission part could become
loose and break.
Loosen the nut several turns to release the transmission part from
the bolt.
Prepare the new transmission part (spare part) with the position of
the transmission wheel (transmission bolt) already adjusted.
N O T E
• Pay attention to removal while replacing and prevent dust
and foreign particles, etc. from entering it (the exposed
part during removal is the mechanical part of the valve).
• Do not damage the valve joint with tools.
Fit the transmission part to the body of the valve, hold onto both
and make sure their axes coincide before fitting the nut to the valve
body bolt.
Tighten the nut by hand and apply the torque value: 12 Nm - 15 Nm.
N O T E
• Do not apply significant force to the motor, such as rotational torque or bending load, while holding it with your
hand and tightening the nut.
• The direction of the eccentric part of the motor is fitted in the same way as the expansion valve. Although the
motor is facing away from the piping connections on the valve body, modification of this direction does not
affect the valve open/close function. Therefore, it is not necessary to adjust the direction of the motor if the
motor position moves in the direction of rotation after replacement, as shown in the figure.
• However, check that the motor direction for the electronic expansion valve coil does not touch another pipe or
the side plate of the electrical box.
Once replaced, fit the electronic expansion valve in the reverse manner as indicated for the removal process.
Position the butyl sheet, attaching it correctly to the valve.
N O T E
Check that the cables do not touch the fan duct after installation is complete.
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SMGB0063 rev. 1 - 10/2010
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