Daikin VRV II Series Design, Installation & Testing Instructions page 160

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Caution
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Caution
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Caution
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Caution
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Caution
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Read this manual attentively before starting up the unit. Do not throw it away. Keep it in your
files for future reference.
Improper installation or attachment of equipment or accessories could result in electric
shock, short-circuit, leaks, fire or other damage to the equipment. Be sure only to use
accessories made by Daikin which are specifically designed for use with the equipment and
have them installed by a professional.
If unsure of installation procedures or use, always contact your Daikin dealer for advice and
information.
The refrigerant R410A requires strict cautions for keeping the system clean, dry and tight.
A.Clean and dry
Foreign materials (including mineral oils such as SUNISO oil or moisture) should be
prevented from getting mixed into the system.
B.Tight
R410A does not contain any chlorine, does not destroy the ozone layer, and does not
reduce the earth's protection against harmful ultraviolet radiation.
R410A can contribute slightly to the greenhouse effect if it is released. Therefore we should
take special attention to check the tightness of the installation.
Read the chapter "Refrigerant piping work" carefully and follow these procedures correctly.
Since design pressure is 3.8MPa or 38bar (for R407C units: 3.3MPa or 33bar), pipes of
larger wall thickness may be required.
Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its
liquid state. (If the refrigerant is charged in a state of gas, its composition changes and the
system will not work properly.)
The indoor unit is for R410A. See the catalog for indoor unit models which can be
connected.
(Normal operation is not possible when connected to other units.)
Do not allow children to mount on the outdoor unit, or avoid placing any object on it. Falling
or tumble may result in injury.
Si39-303
Installation Manual