OK, to summarize:
the PSW10 only has L/R RCA inputs - you can use either one.
Turn the Low-pass filter clockwise all the way up
Set the volume/gain control to the 12 o'clock position
For starters set the power switch to on and make sure the LED lights up.
In the receiver:
Set the LFE/Bass out - SWFR pg, 85
All speakers - Small
Cross Over - 80Hz
Verify the speakers/sub is getting a signal by checking channel levels, pg. 87. Test tones need to be on, pg. 88.
We can go from there once you verify you're getting sound out of the sub.