There are no real guidelines for storing installations, mainly because the field is so diverse.  As with many aspects of dealing with variable media and storing artwork outside a purpose built environment, the decisions behind storing installation work are very much interpretative and may need rethinking with each individual piece.

A clear way to begin this process would be to look at the recommendations for the moving image part of the installation.  It may be that the source of the moving image, whether on film, video or otherwise, can be separated from the surrounding structural elements and stored with other work on the same format.  If you do this, it is important that you record the decision and process and even put a note to this effect on the can or case that holds the separated format. This may seem unnecessary if you're looking after your own work, but if anyone else has access to, or looks after your work, now or in the future, it could be vital in making sure the work is seen the way you intend it.

As also noted in decisions and documentation, you should note down all the individual parts of your installation so as to think about what individual storage attention they might need.  These different parts may be the aspects of technology but may extend to other situational and structural elements too. It may be that some parts need special attention and even require further research.

Most elements will require a cool dry environment.  If possible, it would be a good idea to store the larger structure of a work in a self-contained space.  This gives air a chance to circulate around it but also helps protect it from any damage or accidents; something very easy to imagine happening.  If you store installation work with films or videos, try to give them space and make allowances for any possible accidents. If you're intending on making or collecting increasing amounts of installation work, you should make sure the space you create is big enough to encompass these.

It's also incredibly important to store the information about the piece very carefully too.  The process of reconstruction and exhibition may depend it.