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11.2 Indoor Unit 
11.2.1  How to Fix Installation Plate 
The mounting wall shall be strong and solid enough to prevent if from the vibration. 
 
 
 
Dimension 
Model 
1 2  3  4  5  6 
C9***, C12***                           
490 mm 82 mm  439 mm 432 mm 43 mm  95 mm 
C18***, C24***                         
590 mm 82 mm  539 mm 532 mm 109 mm  159 mm
 
The center of installation plate should be at more than 1 at right and left of the wall. 
The distance from installation plate edge to ceiling should more than 2. 
From installation plate left edge to unit’s left side is 3. 
From installation plate right edge to unit’s right side is 4. 
 
B  : For left side piping, piping connection for liquid should be about 5 from this line. 
  : For left side piping, piping connection gas should be about 6 from this line. 
 
1  Mount the installation plate on the wall with 5 screws or more (at least 5 screws).  
(If mounting the unit on the concrete wall, consider using anchor bolts.)  
o  Always mount the installation plate horizontally by aligning the marking-off line with the thread and using 
a level gauge. 
2  Drill the piping plate hole with ø70 mm hole-core drill. 
o  Putting measuring tape at position as shown in the diagram above.  
The hole center is obtained by measuring the distance namely 128 mm for left and right hole 
respectively. Another method is intersection point of arrow mark extension. 
The meeting point of the extension arrow mark is the hole center position. 
o  Drill the piping hole at either the right or the left and the hole should be slightly slanting to the outdoor 
side. (refer to step 11.2.2) 
 
11.2.2  To Drill a Hole in the Wall and 
Install a Sleeve of Piping 
1  Insert the piping sleeve to the hole. 
2  Fix the bushing to the sleeve. 
3  Cut the sleeve until it extrudes about 15 mm 
from the wall. 
 
 CAUTION 
  
   When the wall is hollow, please be sure to use the
  sleeve for tube assembly to prevent dangers 
  caused by mice biting the connection cable. 
 
4  Finish by sealing the sleeve with putty or 
caulking compound at the final stage.