have a copeland scroll on a walk in freezer, that utilizes liquid injection. Compressor failed and I had to replace. The old model compressor had a liquid injection line solinoid valve with a capillary canister. The new compressor utilizes a DTC liquid injection valve. Question is this: Should the liquid injection line solinoid valve been removed or should it have stayed in place? Does the DTC regulate refrigerant and prevent refrigerant migration?