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CONNECTING REFRIGERANT PIPING LINES (Cont.)
16-14 AIR PURGING OF INDOOR UNIT AND REFRIGERANT PIPING LINES
16-14-1 INTRODUCTION
• In some countries the law does not permit purging by blowing refrigerant through the lines.
If this is the case, please refer to page (35) using the vacuum pump.
• The air in the indoor unit and in the refrigerant piping must be purged. If air remains in the
refrigeration piping, it will have undesirable effects as indicated below :
Pressure in the system rises.
Operating current rises.
Cooling efficiency drops.
Moisture in the refrigerant circuit may freeze and block capillary tubing.
Water may lead to corrosion of parts in the refrigeration system.
• Be sure, using a torque wrench to tighten the service port cap ( after using the service port ),
so that it prevents the gas leakage from the refrigeration cycle.
16-14-2 AIR PURGING OF INDOOR UNIT AND REFRIGERANT PIPING LINES
USING REFRIGERANT CONTAINED IN OUTDOOR UNIT
The outdoor unit includes an extra 50 grams of refrigerant for air purge.
33
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