Midea LC3 Series Technical & Service Manual page 77

MCAC-UTSM-202006
Manual
2.3 Lifting the IDU
• Mount the lifting bolt in the U-shaped groove to install the lifting lugs, lift the machine, and use the gradienter
to determine how level the device is.
• Fasten the nuts on the top.
2.4 Air inlet panel for air return plenum
Site adjustment of air return plenum:
There are two kinds of air return modes for this series of models. One is back return air which is the factory
default. The other is bottom air return which can be adjusted on-site. Refer to the following diagrams on the
adjustment method.
1. Remove back cover plate assembly
2. Install back cover plate assembly
Caution:
• In creating the air return plenum on the air inlet panel, make sure the air inlet grille is angled such that it is
parallel to the direction of the air inlet. See Figure 1.
• There should be no angle between the air inlet grille and the direction of the air inlet; otherwise the noise
level will increase. Figure 2 shows the incorrect way of making the air inlet panel.
• When the air outlet panel is connected to the air outlet flange of the unit body via the metallic air diffuser,
make sure that the sheet metal contact surface is properly sealed and insulated using sponge, as shown in
Figure 3.
Midea LC3 Series DC Inverter Air conditioner Technical Service
76