The information received, there is no need to install additional heat exchangers. In the case of HVU-4 S/D and CDU-4 in standalone mode from Shell's design guide. Heat exchange device designed to remove them completely, then.
Information received is a need to install an additional heat exchanger in a number of cases where HVU-4 S / D and CDU-4 in standalone mode to the manual design of the shell. Heat exchanger design and then took cover.