R410A All DC Inverter Mini VRF MCAC-VTSM-2014-10
58 Installation
1. Precautions
Ensure that all Local, National and International regulations are satisfied.
Read this “PRECAUTIONS” carefully before Installation.
The precautions described below include the important Items regarding safety.
Observe them without fail.
After the installation work, perform a trial operation to check for any problem.
Follow the Owner’s Manual to explain how to use and maintain the unit to the customer.
Turn off the main power supply switch (or breaker) before maintenance the unit.
Ask the customer that the Installation Manual and the Owner’s manual should be kept together.
Caution 1:
The characteristics of R410A refrigerant are hydrophilic, oxidizing membrane or oil, and its pressure is
approx.1.6 times higher than that of refrigerant R22. Accompanied with the new refrigerant, refrigerating oil has
also been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or
refrigerating oil does not enter the refrigerating cycle.
To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of charging
port of the main unit and installation tools are charged from those for the conventional refrigerant. Accordingly
the exclusive tools are required for the new refrigerant (R410A).
For connecting pipes, use new and clean pipes designed for R410A, and please care so that water or dust
does not enter. Moreover, do not use the existing piping because there are problems with pressure-resistance
force and impurity in it.
Caution 2:
This unit must be connected to the main power supply by means of a switch with a contact separation of at
least 3 mm. The installation fuse must be used for the power supply line of this conditioner.
Caution 3:
Ask an authorized dealer or qualified installation professional to install/maintain the air conditioner.
Inappropriate installation may result in water leakage, electric shock or fire.
Turn off the main power supply switch or breaker before attempting any electrical work. Make sure all power
switches are off. Failure to do so may cause electric shock.
Connect the connecting cable correctly. If the connecting cable is connected in a wrong way, electric parts may
be damaged.
When moving the air conditioner for the installation into another place, be very careful not to enter any gaseous
matter other than the specified refrigerant into the refrigeration cycle.
If air or any other has is mixed in refrigerant, the gas pressure in the refrigeration cycle becomes abnormally
high and it may resultantly causes pipe burst and injuries on persons.
Do not modify this unit by removing any of the safety guards or by by-passing any of the safety inter lock
switches. Exposure of unit to water or other moisture before installation may cause a short circuit of electrical
parts.
Do not store it in a wet basement or expose to rain or water. After unpacking the unit, examine it carefully if
there is possible damage.
Do not install in a place that might increase the vibration of the unit. To avoid personal injury (with sharp edges)
be careful when handling parts.
Perform installation work properly according to the Installation Manual.
Inappropriate installation may result in water leakage, electric shock or fire.
When the air conditioner is installed in a small room, provide appropriate measures to ensure that the
concentration of refrigerant leakage occur in the room does not exceed the critical level.
If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, noxious gas may generate.
After the installation work, confirm that refrigerant gas doer not leak.
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