Midea Forest MOAA31-12CN1-NB8, Technical Manual

 Installation



 Page 39 



3.  Indoor Unit Installation

3.1  Service space for indoor unit

12cm (4.75in)

or more

2.3m (90.55in) or more

12cm (4.75in)

or more

15cm (5.9in) or more

3.2  Attach mounting plate to wall

• 

The mounting plate is the device on which you 
will mount the indoor unit.

1. Remove the screw that attaches the mounting plate to 
the back of the indoor unit.

2. Place the mounting plate against the wall in a location 
that meets the standards in the Select Installation Location 
step. (See Mounting Plate Dimensions for detailed 
information on mounting plate sizes.)

3. Drill holes for mounting screws in places that:

•  have studs and can support the weight of the unit.
•  correspond to screw holes in the mounting  plate.

4. Secure the mounting plate to the wall with the screws 
provided.

5. Make sure that mounting plate is flat against the wall.

• 

Mounting plate dimensions

Different models have different mounting plates. In order 
to ensure that you have ample room to mount the indoor 
unit, the diagrams to the right show different types of 
mounting plates along with the following dimensions:

1. Width of mounting plate

2. Height of mounting plate

3. Width of indoor unit relative to plate

4. Height of indoor unit relative to plate

5. Recommended position of wall hole (both to the left 
and right of mounting plate)

6. Relative distances between screw holes

Correct orientation of Mounting Plate

For Forest series:

228.5mm(8.99in)

241mm(9.48in)

183.6mm(7.2in)

123.6mm(4.86in)

805mm(31.7in)

398mm(15.98in)

Left rear wall 

hole 65mm (2.5in)

Right rear wall 

hole 65mm (2.5in)

Indoor unit 

outline

39mm

 (1.5in)

39mm

 (1.5in)

285mm (11.2in)

47.1m

m

 (1.85in)

47.1mm

 (1.85in)

45mm(1.7in)

117.5mm(4.62in)

12k Models

Left rear wall 

hole 65mm (2.5in)

Right rear wall 

hole 65mm (2.5in)

Indoor unit 

outline

302mm (11.88in)

36.6mm

 (1.44in)

36.7mm

 (1.44in

)

47mm

 (1.85in)

47.5mm  (1.87in)

304.1mm(11.9in)

224.2mm(8.82in)

45mm(1.7in) 259.1mm(10.2in)

100.6mm(3.96in)123.7mm(4.87in)

958.3mm(37.7in)

439mm(17.28in)

18k Model

Left rear wall 

hole 65mm (2.5in)

Right rear wall 

hole 65mm (2.5in)

324.9mm (12.79in)

55mm

 (2.16in)

47mm

 (1.85in)

47mm

 (1.85in)

55m

m

 (2.16in)

316.7mm(12.4in)

1037.6mm(40.85in)

271.7mm(10.69in)

291mm(11.45in)

246mm(9.68in)

45mm(1.77in)

45mm(1.77in)

506mm(19.92in)

24k Model

3.3  Drill wall hole for connective piping

You must drill a hole in the wall for refrigerant piping, the 
drainage pipe, and the signal cable that will connect the 
indoor and outdoor units. 

1. Determine the location of the wall hole based on the 
position of the mounting plate. Refer to Mounting Plate 
Dimensions. 

2. Using a 65mm (2.5in) or 90mm(3.54in) (depending on 
models )core drill, drill a hole in the wall. Make sure that 
the hole is drilled at a slight downward angle, so that the 
outdoor end of the hole is lower than the indoor end by 
about 5mm to 7mm (0.2-0.27in). This will ensure proper 
water drainage.