looks like the model path is needed..
var oModelZ = new sap.ui.model.odata.ODataModel(sUrl,true); // true - json
this.setModel(oModelZ, "path1");
what is the structure of your json response.. you need to have the path... seems like from your binding you have properties of an end point such as:
{
path1:[ { Title: 'T1', Color: 'C1', Value: 'v1' },
{ Title: 'T2', Color: 'C2', Value: 'v2' } ],
path2: {} // diff object
}
you need to have your path: path1 specified somewhere then your properties Title, Color, Value would display correctly