Eager to keep up with this new technology, an installer decides to install a hydraulic separator between a boiler and distribution system as shown to the right. The space-heating loads consist of two “unmixed” zone circuits and one mixed zone circuit. The installer connects the unmixed higher-temperature loads upstream of the mixed lower-temperature load. All the load circuits are supposed to operate independently. The indirect water heater is operated as a priority load.
When the system was turned on, there was very little warmth from the low-temperature loads. What’s the problem? Can you also spot a few more missing or incorrect details?