Copy the Oracle Data Integrator 12.2.1.4 zip file to the middleware host, and unzip the file.
Make sure you have set JAVA_HOME, and then run the following command to start Oracle WebLogic Server:
$JAVA_HOME/bin/java -jar fmw_12.2.1.4.0_odi.jar
Select the same NEW_ORACLE_HOME location as provided for Oracle Fusion Middleware Infrastructure, for example, /scratch/biapps/Oracle/Middleware/NEW_ORACLE_HOME.