Mitsubishi Electric CR800 Series Instruction Manual page 23

The installation procedure of the base unit is shown in the following.
a) Fix two mounting screws for the upper side of the base unit to the control panel.
b) Place the notch on the right side of the base unit to a screw on the right side of the panel.
When the RQ extension base unit is used, place the bell-shaped hole on the right side of the base unit to
the screw on the right side of the panel.
<Basic base unit, extension base unit>
c) Place the bell-shaped hole on the left side of the base unit to a screw on the left side of the panel.
d) Fix the mounting screws into the holes at the bottom of the base unit, and retighten all the mounting
screws.
Notes: In the condition that the right end slot is vacated, install the basic base unit in the plate. When you
remove, remove the basic base unit after removing the unit of the right end slot.
2Unpacking to installation
<RQ extension base unit>
Installation and connection 2-11