Yes it does, however I would not recommend you do that.
The reason LFE is a separate channel is to provide a place to carry *LOUD* bass. When you mix LFE into a "normal" channel you have to apply quite a bit of attenuation to keep from clipping the input of whatever's on the other end of that cable. When you then raise amp volume to get a normal listening level you are also raising the noise floor on that channel.
Keep in mind that all of the normal channels are perfectly capable of carrying bass in their mix, as low in frequency as you would care to go. Indeed, mixers have to put all critical bass into the main channels as well as they can not assume the listener will have a sub. What's special about the LFE channel is not that it carries bass, but that it carries LOUD bass.
Indeed, you will find that many studios don't put ANYTHING in the LFE channel of their SACD 5.1 tracks. They put all the bass in the main speaker channels.
Anyway, if you really want to do it, and again, I don't recommend it, set Subwoofer to OFF and LF/RF to Large in the multichannel Analog Speaker Configuration.
If you don't have a Subwoofer and would prefer to DISCARD LFE -- which is what I would recommend -- set Subwoofer to ON (even though nothing is cabled to that output ) and other speakers to Large.
NOTE: For you 105 owner's following this discussion, the Dedicated Stereo Analog Outputs on the 105, when set to Stereo Signal DOWN-MIX STEREO, *ALWAYS* discard LFE for just this reason. When set to FRONT LEFT/RIGHT they react to the multi-channel settings just as described above.