The utility provides the site with a 480V single phase service. The Owner has an existing 480V transformer that gets the voltage down to 120V. This xfmr is being relocated, specs on it are: 15kVA, 60Hz, single phase, Primary Volts 432/456/480, Secondary Volts 120/240.
See attached photo which includes a wiring diagram - not sure what to make of it. If I read it correctly there are two wires coming in, they will connect to H1 and H4 - no neutral wire, only the two phase wires. I don't get what it is asking for on the secondary side - can I can get a 120/240 1p 3w service on this secondary?