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The compressor should never be operated with less than 6 ounces of oil. When oil is added the level should not go above 10 ounces. Piper refrigerant oil PMS-L2000 or equivalent 500 viscosity refrigerant oil must be used. g. Evacuate and charge system. (Per Paragraphs 14-13 and 14-14.) NOTE The 10 ounce oil level is required in compressors installed on new systems.
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