
4) Wiring
ELECTRICAL CONNECTIONS
• Wiring regulations on wire diameters differ from country to country. Please refer to your LOCAL ELECTRICAL
CODES for field wiring rules. Be sure that installations comply with the rules and regulations.
GENERAL PRECAUTIONS
• Ensure that the rated voltage of the unit corresponds to the name plate before carrying out proper wiring
according to the wiring diagram.
• Provide a power outlet to be used exclusively for each unit. A power supply disconnects and a circuit
breaker for over-current protection should be provided in the exclusive line.
• The unit must be GROUNDED to prevent possible hazards due to insulation failures.
• All wiring must be firmly connected.
• All wiring must not touch the hot refrigerant piping, compressor or any moving parts of fan motors.
(5) Vacuuming and Charging
The pre-charged outdoor unit does not need any vacuuming or charging. However once it is connected, the
connecting pipe line and the indoor unit need to be vacuumed before releasing the R22/R407C/R410A from the
outdoor unit.
1. Open the service port core cap.
2. Connect pressure gauge to the service port.
3. Connect the line to vacuum pump. Open the charging manifold valve and turn the pump on. Vacuum to -0.1
MPa (-760mmHg) or lower. (Evacuation time varies by the pump but averagely in 1 hour).
(6) Additional Charge
• The refrigerant charge has already charged into the outdoor unit. For the piping length of 7.6m, additional
refrigerant charge after vacuuming is not necessary.
• When the piping length is more than 7.6m, please use the table below (unit in gram).
Model 10m 15m 20m 35m 45m
20D/DR 75 / 125 150 / 250 - - -
25D/DR 190 / 250 380 / 500 - - -
30D/DR 250 500 750 1500 2000
40D/DR 250 500 750 1500 2000
50D/DR 250 500 750 1500 2000
62C/CR 550 1100 1650 3300 -
The additional refrigerant charge amount recommended is a guideline for longer piping application. The actual
charge required may be different from the guideline due to different application and variation in site conditions.
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Note : R407C - Fix filter dryer
R22 - Nil
R410A - Nil
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