Fujitsu AB* A12GATH, Design & Technical Manual

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PRECAUTION
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About fresh air intake kit
•The Fresh Air Intake Kit can be installed onto cassette type air conditioners.
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The volume of ventilated air provided by the Fresh Air Intake Kit may be unable to fulfill ventilation
regulations in all countries.
On such occasions we ask that this kit be used along with Energy recovery ventilators.
• When intaking outside air please ensure correct air-conditioning design as based on air-
conditioning load calculations.
As outside air is not being processed an increase in outside air load can affect air conditioning.
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Installation location
• Area that generate substances that adversely affect the equipment, such as sulfuric
gas,chlorine gas,add,or alkali it will cause the copper pipes and brazed joints to corrode,which
can cause refrigerant leakage.
• Area with high salt content,such as at the seaside. It will deteriorate metal parts, causing the
parts to fall or the unit to leak water.
• Be certain to use electric dampers and shutters to avoid infiltration of cold air, wind and fog
during shutdown in areas with cold climates, strong winds, or where fogs are common.
• Please ensure the product is installed a distance of at least three times the duct diameter away
from exterior wall air inlets, or air exhausts for the prevention of short circuits.
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Temperature conditions
• Condensation may form on the product when outside air temperature is low, and the temperature
and humidity surrounding the product are high . Don't intake the air of below 0°C into the fresh air
intake kit.
•The upper limit of the product’s temperature range should respond to the outdoor temperature range.
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About duct fan
• When installing the duct fan, connect the drive relay ( Locally purchased ) and operate with the
indoor unit.
• Please ensure the intake air volume is below 10% of the product’s air volume HI. When
the intaken air volume becomes too large there the operating noise may increase and room
temperature detection may be affected.
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About the duct connection
• Procure a duct with internal diameter that fits the external diameter of the duct flange.
• Please note that regulations of some countries may require the use of a nonflammable duct.
• If the duct penetrates a fire-retarding division or other fire-proofing measures, the installation
of fire dampers, or a construction that does not adversely affect fire control measures is a
regulatory requirement of some countries.
• When using metallic ducts please ensure metals (i.e., metal lath, wire lath, stainless sheeting) are
electrically insulated. (A short occurring by electrical connection can cause fire)
•Please ensure to thermally insulate connected ducts to prevent condensation.
• Please make certain that netting or other measures are installed in parts exposed to the outside
air to prevent infiltration of small animals such as birds and insects.
• Please be certain to install external air filters to parts exposed to the outside air for heat
exchanger protection of indoor equipment.
• Please avoid the infiltration of rain water by installing outside ducts with an incline of at least 1/30,
and fitting hoods on openings.