Multiple-compressor system with oil balance control

A climate-control system comprising:

• a first compressor including a first shell and a first compression mechanism, the first shell defining a first suction chamber from which the first compression mechanism draws a working fluid, the first shell including a first suction inlet through which the working fluid is drawn into the first suction chamber for compression in the first compression mechanism;
• a second compressor including a second shell and a second compression mechanism, the second shell defining a second suction chamber from which the second compression mechanism draws the working fluid, the second shell including a second suction inlet through which the working fluid is drawn into the second suction chamber for compression in the second compression mechanism;
• a lubricant equalization conduit extending between the first and second compressors and in fluid communication with lubricant sumps of the first and second compressors;
• and
• a suction manifold having a first arm and a second arm, wherein the first arm is coupled to the first suction inlet and is configured to provide the working fluid to the first suction inlet, wherein the second arm is coupled to the second suction inlet and is configured to provide the working fluid to the second suction inlet,
• wherein the second arm includes a first suction pipe, a second suction pipe, and a suction valve, and
• wherein the suction valve is movable between:
• (i) a first position in which fluid flow through the second suction pipe is prevented and the working fluid is allowed to flow through the first suction pipe to the second suction inlet, and (ii) a second position in which fluid flow through the first suction pipe is prevented and the working fluid is allowed to flow through the second suction pipe to the second suction inlet.