Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 878

FDC-HKX
6) Hook and install the indoor unit on the mounting plate
from top. Hook slightly at left at first and return to right.
7) Fix the indoor unit on the mounting plate with a screw.
8) Install the lower panel at the original position.
9) Install the right and left side panels at their original
position.
10) This is all for the installation.
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