Carrier 19EA- Manuals

COMPRESSOR MOTOR TERMINAL BOX COMPRESSOR MOTOR DRIVE e, add CONDENSER SECTION REAR VIEW CONTROL BOX COMPRESSOR / MOTOR DRIVE CONDENSER PUMPOUT UNIT COMPRESSOR FRONT VIEW COOLER UNISHELL LEGEND 1 Pumpout Service Valve 1 20. Sight Glass — Rotation 2 Pumpout Service Valve 2 21. Sight Glass — Seal Oil 3...

ISOLATION VALVE OPERATION Opening — Compressor must be off and vessel pressures equalized (see Return Refrigerant to Normal Operating Condition, steps 1 thru 6). ^. Loosen packing nut 1/2 to 1 turn so valve stem will rotate and slide smoothly in packing. Do not let refrigerant trapped in valve body ...

b. If utility vessel has been evacuated — Crack open valve 4 to gradually equalize pressure between unishell and utility vessel. Ensure that unishell pressure does not drop below 35 psig to prevent tube freeze-up. 6. Open valve 4 fully. 7. Open valve (29) to equalize the liquid refrig­ erant levels ...