Carrier Compressors Service Guide

Use only Carlyle approved oil appropriate for therefrigerant being used. Sections 3.6 and 3.7 onpages 69-72 list all the approved oils. Section 3.11 onpage 73 notes the correct oil pump pressure in relation toage of the compressor.3. Leak test, evacuate, and dehydrate the system.4. Charge the system. When initially charging the high sideof the system with liquid refrigerant, all service valvesshould be closed (front seated). This will preventrefrigerant from migrating to the compressor crankcaseand into the oil, causing a flooded start.The system is now charged and ready for start-up.Recheck the oil levels and add or remove oil as necessary.Open (backseat) the discharge service valve andany oil equalization lines on parallel systems. Open thesuction service valve 1/2 to 1 turn, or enough to allowthe compressor to run without tripping the low-pressureswitch. This is to prevent damage to the compressorfrom any liquid refrigerant floodback.5. On water-cooled condensing systems, open water supplyvalve and allow water to reach condenser. On air-cooledcondensing systems, turn condenser fan on when thecompressor unit is started.6. Ensure that all evaporator connections are opened andfans started.7. On systems with more than one compressor in parallel,start one compressor at a time.15