Controls and Map Center for OpenLayers?

I want to add more controls to myOl3ViewTemplate application. If you can help me add:

1. draw feature


2. delete feature


3. zoom[center] at a certain location

I looked at app.js and tried to add more controls but I couldn't get them to work. As for to zoom at a certain location I tried Bethlehem[South Africa] but the center goes to Congo I don't know why because these coordinates[-28.23333,28.3] says Bethlehem[SA] .

I would like you to help me on application launch to view only South-Africa and zoom at Bethlehem.