- (01-22) -
4-4. DESIGN PRECAUTIONS
4-4-1. CAUTION ON SAFETY
SAFETY PRECAUTIONS
Described below is what you are supposed to observe to prevent
dangers to the users or other people as well as damage or loss of the
property.
The degrees of danger or damage that is likely to occur due to the
wrong use ignoring the indications are categorized for explanations as
marked below.
DANGER
The column with this mark shows “Impending Danger
of Death or Serious Injury.”
WARNING
The column with this mark shows “Conceivable Threat
of Death or Serious Injury.”
CAUTION
The column with this mark shows “Likelihood of
Damage or Loss to Materials Only.”
Kinds of the items to be observed are categorized for clarification
with the following pictorial symbols. (The marks described below
are samples.)
This pictorial indication shows “Prohibited.”
This pictorial indication shows “Forced Execution.”
CAUTIONS FOR INSTALLATION
Do not install, move, or relocate the
unit by yourself without contacting
your dealer or professional installer.
Improper installation could cause
a drop of the unit, an electric
shock, or a fire.
Ask the sales office or the engineer-
ing shop to perform the work.
The external air intake opening
should not be positioned where dis-
charged air may directly enter it.
A situation like this will lead to the
room being contaminated and
this may pose a health risk.
The external air intake opening
should be positioned away
from the exhaust openings of
combustion gasses.
The intake of such gasses
could lead to a lack of oxy-
gen in the room.
WARNING
Prohibited
Install the unit inside the
heat-insulating walls (in the space
insulated from the open air).
If you install it outside (in the space
equivalent to the open-air conditions),
dew is condensed inside the unit body
in the winter season, causing electric
shocks or dew condensation water to
drops, etc.
Install at a stable place of sufficient
strength.
Please note that there might be
some places not strong enough
to install due to the building
structure.
Provide an exclusive circuit
breaker.
Depending on the environment for
installation, it becomes necessary
to install an earth leakage breaker.
Unless the earth leakage
breaker is installed, it could
cause an electric shock.
Ask the sales office of the engi-
neering shop to perform the work.
Do not install in locations where
harmful or corrosive gasses may
be present (e.g. acidic, alkali, or-
ganic, solvent, paint gasses, etc.
from machinery or chemical plants,
etc.).
Installation in such a location
could cause a gas-poisoning
and a fire.
Carry out GND work.
Never connect the GND wire
to a gas pipe, a water supply
pipe, a lightning conductor, or
a GND line of a telephone,
c. An incomplete GND wire
likely to cause an electric
shock.
et
is
If the unit is accompanied by water
drainage, make sure that the duct
is installed properly.
If it is not installed properly,
the building is likely to be
flooded, wetting the house-
hold effects.
Do not install the unit in locations
with large amounts of oily smoke.
If you use the unit in such a
location, the filter or the heat
exchange element gets
clogged with oily substances,
and unable to be utilized.
Do not install the unit in high
humidity locations, such as bath-
rooms.
Doing so may cause an electric
shock or a breakdown of the
unit.
(Excluding any humid-
ity-resistant models)
CAUTION
Insulated Walls
Duct
Unit Body
External
Air
GND wire
connection
Prohibited
Prohibited
Prohibited
Install the unit inside the
heat-insulating walls (in the space
insulated from the open air).
If you install it outside (in the space
equivalent to the open-air conditions),
dew is condensed inside the unit body
in the winter season, causing electric
shocks or dew condensation water to
drops, etc.
Install at a stable place of sufficient
strength.
Please note that there might be
some places not strong enough
to install due to the building
structure.
Provide an exclusive circuit
breaker.
Depending on the environment for
installation, it becomes necessary
to install an earth leakage breaker.
Unless the earth leakage
breaker is installed, it could
cause an electric shock.
Ask the sales office of the engi-
neering shop to perform the work.
Do not install in locations where
harmful or corrosive gasses may
be present (e.g. acidic, alkali, or-
ganic, solvent, paint gasses, etc.
from machinery or chemical plants,
etc.).
Installation in such a location
could cause a gas-poisoning
and a fire.
Carry out GND work.
Never connect the GND wire
to a gas pipe, a water supply
pipe, a lightning conductor, or
a GND line of a telephone,
c. An incomplete GND wire
likely to cause an electric
shock.
et
is
If the unit is accompanied by water
drainage, make sure that the duct
is installed properly.
If it is not installed properly,
the building is likely to be
flooded, wetting the house-
hold effects.
Do not install the unit in locations
with large amounts of oily smoke.
If you use the unit in such a
location, the filter or the heat
exchange element gets
clogged with oily substances,
and unable to be utilized.
Do not install the unit in high
humidity locations, such as bath-
rooms.
Doing so may cause an electric
shock or a breakdown of the
unit.
(Excluding any humid-
ity-resistant models)
CAUTION
Insulated Walls
Duct
Unit Body
External
Air
GND wire
connection
Prohibited
Prohibited
Prohibited
CAUTIONS FOR OPERATIONS
Do not use as an air circulators for open-type burners (heaters).
When gas or oil stoves are used in the home, separate equipment for circu-
lating the air should be used.
DANGER
Prohibited
When any abnormal condition
(scorching smell, etc.) is found, stop
the operation immediately and keep
the exclusive circuit breaker “OFF.”
If you continue the operation without
removing the cause, it could cause a
mechanical breakdown, an electric
shock, or a fire.
When the system needs a repair,
consult the sales office or the engi-
neering shop.
Do not push a finger or stick into the
open-air inlet or the exhaust outlet.
A fan rotating with a high rpm
will injure you.
If combustible gas leaks from
the unit, ventilate the room by
opening windows.
If operation were to be at-
tempted in such a situa-
tion, sparking at electrical
contact points could cause
an explosion.
Modification of the system is
strictly prohibited.
Improper repair could
cause an electric shock or
a fire.
When the system needs a
repair, consult the sales office
or the engineering shop.
Netting or something similar
should be provided at the ex-
ternal air intake opening to
prevent birds, etc. interfering
with the unit.
Nests or other foreign ob-
jects should be removed.
That could lead to a lack of
oxygen in the room.
WARNING
Prohibited
Prohibited
Combustion apparatus should not be
placed allowing a direct exposure to wind
of the unit.
Incomplete combustion could
occur on the apparatus.
Do not blow directly
against animals or
plants.
Likely to cause bad effects on animals
and plants.
Please check the intended uses in
detail for such special purposes as
preservation of foods, flora and
fauna, precision devices, or work of
art, etc.
For special purposes, please conduct
thorough checks in advance.
Otherwise, it could cause deteriora-
tion of quality or other problems.
If the unit is not used for a long period
of time, keep the exclusive circuit
breaker “OFF” for safety reasons.
If the power is left on, any
build-up of dust could
cause a heat generation or
a fire.
Do not wash the unit with water.
It could cause an electric
shock.
Do not handle switches with a
wet hand.
It could cause an electric
shock.
Do not use a spray containing
combustible gas near the unit.
It could cause a fire.
Do not use the unit outside
the rated voltage.
It could cause a fire or an
electric shock.
Do not incline the unit when
taking it out.
Otherwise, water re-
maining inside is likely to
drop and wet the furniture
or other properties.
() Ask the sales office or the
engineering shop to perform
the work.
CAUTION
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
Prohibited
CAUTIONS FOR MAINTENANCE
When the filter and the heat exchange element is to be cleaned up, turn the
unit off and keep the exclusive circuit breaker “OFF.”
Cleaning should never be done while the internal fans are running with high
speed. And when using a stepladder, etc., make sure to fix it properly.
WARNING
CAUTION
Do not use benzene or metal brush,
etc., when cleaning the filter and the
heat exchange element.
The filter should be cleaned regularly.
Dust or dirt building-up on it can
lead to a lack of oxygen in the
room.
Use gloves when cleaning the
filter or the heat exchange
element.
Doing so will reduce pos-
sibilities of injuries.
G
as
o-
Th
in
ne
r
Prohibited
Otherwise, the unit will get unfit
for use.
Be
n-
Metal brush
