Dear All

I have 2 units of 4 hp hermetic condensing units (CU) that I want to use for a supermarket display case application ( 3 cabinets of different sizes with common liquid and suction line). The ideal way would be to have 1 bigger CU or a common rack. In this case , it was a matter of having available cheaper CU's of that capacity.

The plan is to have a common suction header and a common liquid header, oil return from Oil Separator to individual suction lines ( after common suction header) , oil and gas equalization between crankcases without capacity control.

Questions :Is there an issues with having 2 condensors and 2 receivers on a common system like this? How can I effect capacity control and pumpdown? Apart from the check valves in the discharge line, do I also need check valves in the individual suction to the compressors ?

Any other foreseeable issues ?