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MATIN: Thank you for your inputs. I will give you more information about the existing condenser (C-1)and the new condenser (C-2): 1. C-1 and C-2 are not identical in sizes. C-2 duty is half of C-1. The units are separate. 2. The length of piping from the compressor discharge to each...

Thanks, Art. I appreciate your advice on this. I will let you know in August on how the units are performing. TU1

Art, thanks for the tips. The condenser, actually, is a horizontal air-cooled heat exchanger and the NH3 is a R-717 (ASHRAE)refrigerant. So, if the 2 units are going to be in parallel, do you foresee one will have more flow going through than the other? I guess my concern is one unit will be...

We are looking at adding a second ammonia refrig condenser to provide additional surface area as the existing unit could not keep up with the cooling required. My question is: should the new condenser be tied in parallel or in series with the existing unit? I've heard they should be connected...