This was posted bt Curt Wishman of IRD on audiocircle.com in the IRD forum-
"Many people use their 2CH system and their HT receiver system together. The 2CH system becomes the front L&R channels in the HT. The HT receivers amplifiers provide the center and Rear L&R surround channels. This way you can get the best of both worlds.
The HT receivers front L&R preamp outputs are feed to the 2CH systems preamp and given a gain of x1 (OdB) either by using a HT pass-through input or standard input and setting the 2CH preamps gain to 0dB. Not the HT receiver controls the HT volume.
The HT receivers front L&R preamp outputs are feed to the 2CH systems preamp and given a gain of x1 (OdB) either by using a HT pass-through input or standard input and setting the 2CH preamps gain to 0dB. Not the HT receiver controls the HT volume."
link
I believe the 2802 has preamp outputs so this should work for you.
Hope this helps. Dave