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4
Selection of installation place
CAUTION
•
Do not install the Air to Air Heat Exchanger with
DX Coil Unit in a location subject to a risk of
exposure to a combustible gas.
If a combustible gas leaks and stays around the unit,
a fire may occur.
•
Install the unit so that the air discharge is located
at least 1.5 m from the nearest fire alarm.
Otherwise, when a fire occurs, the fire alarm may be
late to detect it, or may not detect it at all.
Install the indoor unit in a place where cool / warm
air circulates evenly.
Avoid installing in the following places.
• Places where the outside temperature falls below
5 °C. (If the temperature around the unit falls below
5 °C, water in humidifier freezes and the water will
leak. (VNK type only)
• Places where air pipes are installed in the ceiling
cavity.
• Place exposed to air with high salt content (seaside
area)
• Place exposed to large quantities of sulfide gas (hot
spring).
(Should the unit be used in these places, special
protective measures are needed.)
• A restaurant kitchen where a lot of oil is used or place
near machines in a factory (Oil adhering to the heat
exchanger and resin part (turbo fan) in the indoor
unit may reduce the performance, generate mist or
dew drop, or deform or damage resin parts.)
• Places where iron or other metal dust is present. If
iron or other metal dust adheres to or collects on the
interior of the air conditioner, it may spontaneously
combust and start a fire.
• Places where obstacles disturbing the air current
such as a ventilation hole or lighting apparatus are
near the unit. (The performance of the unit may be
deteriorated or the unit may not work due to
disturbance of the air current.)
• Do not use the air conditioner for special purposes
such as preserving food, precision instruments, or
art objects, or where breeding animals or growing
plants are kept. (This may degrade the quality of
preserved materials.)
• Place where any of high-frequency appliances
(including inverter devices, private power
generators, medical equipment, and communication
equipment) and inverter-type fluorescent light is
installed.
(A malfunction of the air conditioner, abnormal
control, or problems due to noise to such appliances /
equipment may occur.)
• Places where there is something that must not
become wet. When the humidity reaches 80% or
more, or when the draining pipe is clogged, water
droplets may fall from the unit.
• Place near a door or window exposed to humid
outside air (Dew dropping may form.).
• Place where special spray is used frequently.
• Places such as outdoors or under the eaves (where
rain may fall directly on the unit).
• Do not use the unit in chemical plants with a cooling
system which uses liquid carbon dioxide, etc.
Installation space
Leave ample space for installation or servicing.
REQUIREMENT
• Before installing indoor units, attach any accessories
(drain-up kit, etc.: separately purchased) to them. In
addition, make inspection opening on both sides of
each unit.
• The size of inspection opening should be 600 mm ×
600 mm.
200 mm or
more
1000 mm or
more
200 mm
600 mm
Inspection opening
600 mm
600 mm
Installation in high-humidity
places
• Do not use the unit in a kitchen or bathroom.
If the unit is used in a place where much oil smoke is
generated or a place with high humidity, the filter or the
heat exchanging element will become clogged and the
unit will not work.
• Be careful of dewing and frosting.
• In cold regions, the surface of the unit or the duct
connector may be affected by condensation or
frosting depending on the outdoor air conditions or
temperature / humidity of the ceiling cavity even
though the conditions for use are observed. In this
case, add a heat insulator.
• Water droplets may fall if the unit is operated in
wet conditions.
In particular, high humidity may occur even during
non-rainy season if the unit is installed in the
following locations:
1. Ceiling of a tile roof
2. Ceiling of a slate roof
In this case, attach heat insulators (glass wool,
etc.) on the unit’s surface.
Take care so that you can remove the side board
(service panel) easily even when insulators are
attached.
Also insulate the duct and its connectors
sufficiently.
• Do not install the unit in a place where there is
something that must not become wet. Depending
on the temperature or humidity of outdoor air and
the installation place, water droplets may fall from
the unit.
• As shown in the figure to the below, suppose a
high temp absorbing air condition A and a low
temp absorbing air condition B are plotted on the
air line figure, then a high temp air A is heat-
exchanged by the unit and goes out of the
saturation curve as shown by Point C. In this case,
the unit will be dewed or frosted. To avoid this,
heating a low temp air B up to B’ is required so as
to get C’ below the saturation curve, before using
the unit.
• Do not install the unit near a water heater.
A
B
C
C'
B'
Dry-bulb temperature (°C)
A
bso
lu
te
hu
m
id
ity (
kg
/kg
’)
S
at
ur
at
io
n
C
ur
ve
113-EN
114-EN
+00EH99887601-2_01EN.book Page 57 Thursday, September 15, 2016 5:23 PM
