Mitsubishi Electric Mr.SLIM PUZ-ZM YKA2 Serie Manual De Instalación página 5

1. Safety precautions
1.4. Before starting the test run
Caution:
• T urn on the main power switch more than 12 hours before starting opera-
tion. Starting operation just after turning on the power switch can severely
damage the internal parts. Keep the main power switch turned on during the
operation season.
• B efore starting operation, check that all panels, guards and other protective
parts are correctly installed. Rotating, hot, or high voltage parts can cause
injuries.
1.5. Using R32 refrigerant air conditioners
Caution:
• Use C1220 copper phosphorus, for copper and copper alloy seamless
pipes, to connect the refrigerant pipes. Make sure the insides of the pipes
are clean and do not contain any harmful contaminants such as sulfuric
compounds, oxidants, debris, or dust. Use pipes with the specified thick-
ness. (Refer to 4.1.) Note the following if reusing existing pipes that carried
R22 refrigerant.
- Replace the existing flare nuts and flare the flared sections again.
- Do not use thin pipes. (Refer to 4.1.)
• Store the pipes to be used during installation indoors and keep both ends
of the pipes sealed until just before brazing. (Leave elbow joints, etc. in
their packaging.) If dust, debris, or moisture enters the refrigerant lines, oil
deterioration or compressor breakdown may result.
• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration
oil applied to the flared sections. If mineral oil is mixed in the refrigeration
oil, oil deterioration may result.
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Fig. 1-1
• Do not touch any switch with wet hands. Electric shock may result.
• D o not touch the refrigerant pipes with bare hands during operation. The
refrigerant pipes are hot or cold depending on the condition of the flowing
refrigerant. If you touch the pipes, burns or frostbite may result.
• A fter stopping operation, be sure to wait at least five minutes before turn-
ing off the main power switch. Otherwise, water leakage or breakdown may
result.
• Servicing shall be performed only as recommended by the manufacturer.
• Do not use refrigerant other than R32 refrigerant. If another refrigerant is
used, the chlorine will cause the oil to deteriorate.
• Use the following tools specifically designed for use with R32 refrigerant.
The following tools are necessary to use R32 refrigerant. Contact your near-
est dealer for any questions.
Tools (for R32)
Gauge manifold
Charge hose
Gas leak detector
Torque wrench
• B e sure to use the correct tools. If dust, debris, or moisture enters the refrig-
erant lines, refrigeration oil deterioration may result.
1.6. Accessories of outdoor unit (Fig. 1-1)
(ZM200/250, M200/250)
The parts show in the left are the accessories of this unit, which are affixed to the
inside of the service panel.
1 Joint Pipe accessory ......... ×1
(1) Put flare nut which is removed from the Ball Valve on the Joint Pipe accessory
and carry out flare work.
(2) The Joint Pipe accessory and the pipe which is prepared on site must be brazed
in non-oxidation status.
(3) After the pipes are brazed, connect the Joint Pipe accessory to the Ball Valve
which locates within the unit by flare connection.
* Never connect the Joint Pipe accessory to the Ball Valve before brazing. Some
parts may be burnt and it may cause refrigerant leakage.
Flare tool
Size adjustment gauge
Vacuum pump adapter
Electronic refrigerant charging scale
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