Gas Turbines GE Frame 9E - No Fire Fighting system for Generator

We have 5 Gas turbines GE Frame 9E. All of them are equipped with a fire protection system (CO2) to protect the turbine enclosure and Auxiliary compartment. However, the Generator enclosure is not having fire protection/ suppression system. Is it the same for all frame 9E machines and is there any reason behind this design?
I have Frame9E Fire /detection fighting P&ID system with me here and I dont see Generator enclosure equipped with such instrumentation for fire protection.

The last unit i have been working on was Frame 9FB and generator enclosure /package was equipped with that instrumentation

So best thing is that you ask your vendor supplier /packager of these units about that case..