Yajna Varaha Murti is a manifestation of Bhagvan Srihari
Vishnu. The most important prayer dedicated to the deity is the Yajna Varaha Murthy
Sthuthi. You can download the prayer in Telugu text in pdf in the link given
below.
The prayer should be chanted daily morning hours.
It is also chanted on auspicious days dedicated to Varaha
especially the appearance day as per respective Panchangs.