Midea MCA3U-18HRFNX-QRD0W Service Manual page 72

3. Indoor Unit Installation(Floor
Ceiling Type)
3.1 Service space for indoor unit
3.2 Bolt Pitch
Ceiling Installation
D
35mm/1.38in
E
 3. IDU Installation-Floor Ceiling
MODEL(kBtu/h) Length of D (mm/inch)
18~24
30K
36K~60K
Wall-Mounted Installation
3.3 Hang Indoor Unit
1. The installation of hanging screw bolts.
• Cut off the roof beam.
• Strengthen the area at which the cut was made
and consolidate the roof beam.
2. After the selection of the installation location, position
the refrigerant pipes, drain pipes, and indoor and out-
door wires to the connection points before mounting the
machine.
3. Drill 4 holes 10cm (4") deep at the ceiling hook posi-
tions in the internal ceiling. Be sure to hold the drill at a
90° angle to the ceiling.
4. Secure the bolt using the included washers and nuts.
5. Install the four suspension bolts.
6. Mount the indoor unit. You will need two people to lift
and secure it. Insert suspension bolts into the unit's hang-
ing holes. Fasten them using the included washers and
nuts
7. Remove the side board and the grille.

Length of E (mm/inch)
983/38.7 220/8.7
1200/47.2 220/8.7
1565/61.6 220/8.7