1  Indoor unit
2  Attach this side of the checking pattern to the inner side of the 
opening of the ceiling
3  Attach this side of the checking pattern to the lower side of the 
unit
4  Attach this side of  the checking pattern to the ceiling panel
5  Cheking checking pattern
6  Check the height of the ceiling at each corner of the unit
7  Check the dimension of the opening at each side of the unit
8  Attach this side of the checking pattern to the outer side of the 
opening
9  Ceiling Panel
For panelled ceilings.
Once adjusted, tighten the suspension bracket nuts.
Apply a thread-locking product to the bolts and nuts to prevent them from loosening. Otherwise, abnormal noise may be 
caused by mechanical vibrations and the indoor unit may become loose.
2.2.3  Accessories supplied with the air panel: P-N23WAM
Check that the following accessories are supplied with the unit.
N O T E
Please contact your HITACHI distributor if any of the accessories has not been supplied with the unit.
 
Accessory Appearance Quantity Purpose
Long bolt (M5)
4 For panel xing.
2.2.4  Air panel installation
C A U T I O N
Take care while the air panel is unpacked and protect it by placing it on insulating or soft material so as not to 
scratch the sealant insulation.
 
Location of the suspension brackets
Make  sure  the  suspension  brackets  on  the  indoor  unit  are 
approximately 90 mm in height above the false ceiling.