Stay in another city with a Russian student visa 1 month, the problem of landing visa.

There are provisions in the law, but no one actually checks them. If you meet a policeman, say it's a tourist. Nobody cares about this problem. If the landlord is worried, he can go to the local place to apply for a visa on arrival, but remember that the immigration office in sergeyev may not be able to do it locally, and it will be handed over to the whole Moscow area, so it will take a long time, maybe two weeks. If you have a new visa on arrival, you need a new visa on arrival when you go back to school, because the temporary address has changed.