Example 1: "Suction Group A (LT) is subcooled by Suction Group AS (MT)" 1. Define suction circuit for the subcooler and attach it to the suction group of the system doing the subcooling (MT) 2. Add subcooler to refrigeration system being subcooled (LT) a. Attach to REFG-SYSTEM b. Enter subcooled T from RS c. Temperature Ctrl = THERMOSTAT d. Suction Circuit = suction circuit defined above in step 1. e. Refrigeration System = system being subcooled (LT) f. Trunk Circuit = liquid circuit of system doing the subcooling (MT) 3. Attach liquid circuit of system being subcooled (LT) to subcooler defined in step 2. 4. Input subcooler capacity and subcool/suction TD (aka, approach) from RS. (5. Liquid circuit of system doing the subcooling (MT) should remain attached to the refrigeration system doing the subcooling (MT) - good to check) Example 2: "Suction Group AS (MT) is self-subcooled)" 1. Define suction circuit for the subcooler and attach it to the suction group of the system doing the subcooling (MT) 2. Add subcooler to refrigeration system being subcooled (MT) a. Attach to REFG-SYSTEM b. Enter subcooled T from RS c. Temperature Ctrl = THERMOSTAT d. Suction Circuit = suction circuit defined above in step 1. e. Refrigeration System = system being subcooled (MT) f. Trunk Circuit = liquid circuit of system doing the subcooling (MT) 3. Attach liquid circuit of system being subcooled (MT) to subcooler defined in step 2. 4. Input subcooler capacity and subcool/suction TD (aka, approach) from RS.