6. SYSTEM DESIGN
INSTALLATION PRECAUTIONS12.
INDOOR UNIT INSTALLATION PRECAUTIONS12-1.
Note: The information listed below are general precautions. Some models also include items 
that do not apply.
PLACES WHERE USE IS PROHIBITED
Places where there is the danger of combustible gas leakage.
Places where sulfur gas, chlorine gas, acid, alkali, or other matter which effects equipment is 
generated
Places where there is a lot of oil splash and steam (kitchen, machinery room, etc.)
Places where machinery which generates high frequencies is used
Ocean beaches and other areas where there is a lot of salt
Places where carbon fibers and metal powder, powder, etc. suspended in the air
Installation in vehicles, ships, and other conveyances
Factory, etc. where voltage fluctuations are large
POINTS TO REMEMBER WHEN INSTALLING
1) The set shall be installed at a place which can withstand the weight and vibration of the 
indoor unit
2) To allow maintenance after refrigerant piping, drain piping, and electric wiring connection and 
installation, provide an installation service space and an inspection port, as required.
*Installation service space is shown on " DIMENSIONS ".
3) Be careful when installing the set at the following places.
[Installation precautions]
Contents Countermeasures (Reference)
When the 
ceiling is high
If the indoor unit is installed where the 
installation height given in the installation 
manual is exceeded, the temperature 
dierence between the oor and ceiing o the 
room will be large and the heating effect will 
be poor. 
Moreover, even if the indoor unit is  installed 
within the installation height, a similar 
phenomena will occur when installed in a 
room in which the doors are opened and 
closed frequently and hot air circulation is 
obstructed by desks, chairs, etc.
1) Switch the setting to the 
high ceiling mode.
2) Install a circulator.
3) Arrange the furniture in the 
room so that it does not 
obstruct the hot air. 
When lower 
level directly 
contacts the 
outside air.
hen the ower ee o the shop and oce 
is a warehouse, parking lot, etc., the surface 
teperature o the ooring wi becoe ow 
and the radiation o cod ro the oor wi 
increase. 
In this case, your feet will feel cold even if the 
room temperature is suitable.
When the 
air ow 
distribution is 
poor
When an indoor unit is installed in a position 
where the outet air ow wi direct contact 
people, a draft may be felt. 
In addition, when there are obstructions in the 
path o the intae and outet air ow the air 
distribution may become extremely bad.
 djust the ouer ns or 
take other measures 
matched to the site.
2) Change the indoor unit 
outlet.
- (06 - 151) -
SYSTEM
DESIGN
SYSTEM
DESIGN