Using FortiAnalyzer's software in Fortimanager's hardware?

Hi there! My first post here... English isn't my native language, so i'm sorry about some mistakes.

Does somebody know if is it possible to use a hardware from a FortiManager 4000D to install a FortiAnalyzer image? I'm asking because today we have some FortiManagers (4000B) in spare that we would like to use as FortiAnalyzers (above version 4000B).

I know its possible to use VM, but I'm not talking about it :)