Design and Technical Manual

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 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
difference between the oor and ceiling of 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.
When the lower level of the shop and ofce
is a warehouse, parking lot, etc., the surface
temperature of the ooring will become low
and the radiation of cold from the oor will
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 outlet air ow will directly contact
people, a draft may be felt.
In addition, when there are obstructions in the
path of the intake and outlet air ow, the air
distribution may become extremely bad.
1) Adjust the louver ns or
take other measures
matched to the site.
2) Change the indoor unit
outlet.
- (06 - 143) -
SYSTEM DESIGN SYSTEM DESIGN