pioneer SR202 Reverb connection help!

Hi to all! I have been trying to hook up one of two pioneer reverb units and want it to work on my tuner...I hane hooked it up line out to line in on my receiver but I get no reverb when I use the tuner HOW DO YOU HOOK THEESE THINGS UP? I have two receivers a Kenwood KR 8340 Quad. and a Kenwood KR4070 Any help will be greatly appreciated Thanks!