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SELECTION OF INSTALLATION PLACE
Please refer from safety device from Outdoor unit Installation Manual.
Do not install the air conditioner at place where combustible gas may leak.
If gas leaks is collected at surrounding the unit, the production of fire may be caused.
Cautions for Installation at a Place with the Quiet Background Sound
As the Flow Selector unit incorporates the Pulse motor valve, the refrigerant sound or the operating sound of
the Pulse motor valve such as "Bushuu..." generates when exchanging between cooling and heating mode and
during defrost operation. Therefore, avoid installing the unit at a place with quiet background sound as follows.
(1) Rooms with quiet background sound such as bedroom, hospital, or room in a hotel.
(2) Rooms which have no ceiling and a fabric does not block the residence space from the Flow Selector
unit.
(3) Rooms which have opening port at the ceiling.
32.3 ft (10 m) or more
Flow Selector unit
Indoor unit
When installing the unit at the above places, separate the unit from the indoor unit (more than 32.3 ft (10 m))
and install the unit at a place so that sound does not transmit into the room such as in the corridor ceiling.
And take sound proof measure, such as covering around the Flow Selector unit with the sound proofing
materials.
Upon customer's approval, install the air conditioner at a place where satisfies the following conditions.
• Place where Flow Selector unit can be installed horizontally.
• Place which can reserve a service space for safe maintenance or check.
Apply electric insulation between metal section of the building and metal section of the air conditioner in
conformance with the Local Regulation.
Avoid the following places.
• Salty place (seaside area) or place with much gas sulfide (hot spring area)
(If selecting such a place, a special maintenance is required.)
• Place where oil (including machine oil), steam, oil smoke or corrosive gas generates.
• Place where a device generating high frequency (inverter, non-utility generator, medical apparatus, or
communication equipment) is set. (A bad influence may generate by malfunction of the air conditioner, control
trouble, or noise for such equipment.)
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CAUTION
„ Installation under high-humidity atmosphere
In some cases including the rainy season, especially inside of the ceiling may become high-humidity atmosphere.
1. Installation to inside of the ceiling with tiles on the roof.
2. Installation to inside of the ceiling with slated roof.
3. Installation to a place where inside of the ceiling is used for pathway to intake the fresh air.
4. Installation to a kitchen.
• In the above cases, additionally attach the heat insulator to all positions of Flow Selector unit, which come to
contact with the high-humidity atmosphere.
[Installation condition for additional insulation]
When the dry-bulb temperature inside the ceiling is 82°F ( 28°C) or the relative temperature exceeds 80%.
(The shaded area on the psychrometric chart.)
Psychrometric Chart
Installation condition
for additional
insulation
Relative humidity 80%
82°F ( 28°C)DB
„ Installation and service space
Reserve sufficient space required for installation or service work.
• Make space for installation and service. (Make space to the electrical parts box cover side for service.)
• When installing the unit inside the ceiling, be sure to create a check port.
The check port is required when the unit is installed and serviced.
• Keep a clearance of 4.0'' (100 mm) or more between the top panel of the unit and the ceiling.
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24/11/2566 BE 15:06
24/11/2566 BE 15:06
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