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1. Installation information
1. In stallation information
I.Installation information
* Refer to the enclosed Installation Manual for details on installation. Arrange to have an expert install the system correctly.
1-1. General precautions
1-1-1. Usage
The air-conditioning system described in this DATA BOOK is designed for human comfort.
This product is not designed to assist in the preservation of food, provide conditions to maintain plants or animals, or
stabilize environments for the preservation of precision equipment or art objects. To prevent loss of quality, do not use
the product for purposes other than those it is designed for.
To reduce the risk of water leakage and electric shock, do not use the product for air-conditioning vehicles or vessels.
1-1-2. Installation environment
Do not install any unit other than the dedicated unit in an area where the voltage changes significantly, large amounts
of mineral oil (e.g., cutting oil) are present, cooking oil may splash, or a large quantity of steam can be generated, such
as a kitchen.
Do not install the unit in acidic or alkaline environments.
Installation should not be performed in locations exposed to chlorine or other corrosive gases. Avoid installation near
sewers.
To reduce the risk of fire, do not install the unit in an area where flammable gas may leak or flammable material is
present.
This air-conditioning unit has a built-in microcomputer. The effects of noise should be taken into consideration when
deciding on the installation position. It is recommended that the air-conditioning unit be installed in a position away from
antennas or electronic devices.
Install the unit on a solid foundation in accordance with local safety measures against typhoons, wind gusts, and
earthquakes to prevent the unit from being damaged, toppling over, or falling.
1-1-3. Backup system
In regions in which the malfunctioning of the air conditioner may have a critical effect, it is recommended to have two or
more systems made up of single outdoor/heat source units and multiple indoor units.
1-1-4. Unit characteristics
The heat pump efficiency of the outdoor unit depends on the outdoor temperature. In heating mode, performance drops
as the outside air temperature drops. In cold climates, performance can be poor. Warm air will continue to be trapped
near the ceiling and the floor level will remain cold. In such cases, heat pumps require a supplemental heating system
or air circulator. Before purchasing, consult your local distributor for assistance in selecting the unit and system.
When the outdoor temperature is low and the humidity is high, the heat exchanger on the outdoor/heat source unit side
tends to collect frost, which reduces its heating performance. The Auto-defrost function will be activated in order to
remove the frost, and the heating mode will temporarily stop for 3-10 minutes. Heating mode will automatically resume
upon completion of the defrost process.
An air conditioner with a heat pump requires time to warm up the whole room after the heating operation begins, because
the system circulates warm air in order to warm up the whole room.
Sound levels were obtained in an anechoic room. Sound levels during actual operation are usually higher than the
simulated values due to ambient noise and echoes. Refer to the section on "SOUND LEVELS" in the DATA BOOK for
the measurement location.
Depending on the operating conditions, the unit generates noise caused by valve actuation, refrigerant flow, and
pressure changes even when operating normally. Try to avoid positioning the air conditioner in locations where
quietness is required. With regard to the BC/HBC controller, it is recommended that the unit be installed in areas such
as corridor ceilings, restrooms and plant rooms.
The total capacity of the connected indoor units can be greater than the capacity of the outdoor/heat source unit.
However, when the connected indoor units operate simultaneously, each unit's capacity may become smaller than the
rated capacity.
When the unit is started up for the first time within 12 hours after the power comes on, i.e. after a power failure, it
performs initial startup operation (capacity control operation) to prevent damage to the compressor. The initial startup
operation requires a maximum of 90 minutes to complete, depending on the operating load.
MEES20K084
Installation information
2
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