Via online banking
Some online banking services have templates for adding money to Yandex.Money Wallets. You need to find Yandex.Money in the list of payments, specify your Wallet number and amount and to confirm the transfer.
Sberbank Online, Alfa-Click, and many other banks provide these transfers without commission.
Maximum deposit amount is 15,000 rubles if your online banking does not set its own limits.
If your bank is not in the list, make a transfer to the banking details: you can copy them to your online banking.