aquasafe RO/DI problems

[rattler]

I hope somebody can steer me in the right direction.
Last year I bought a used 100 gal/ day aquasafe 5 stage system from another reefer on this board. Well the time has come to install this unit for a 120 gal tank that is being set up. The unit never came with any instructions and I have struck out looking on the web for installation instructions. ( nice web site aquasafecanada.com !! ) I have put new prefilters in and new DI resin. I hooked the unit up to a cold water supply and have the output coming from the DI cartridge to a float valve on a 50 gallon blue plastic tank (barrel), I'm not using the final water polishing filter. The waste water line goes from the check Valve? to a drain in the floor. When I turned on the water the system fills up and starts filling the drum. The problem is it fills the drum in 1 hour and I can not see any waste water coming from the ro cartridge, this is clear tubing. the TDS in measures 212 and measures 140 coming out. I thought it was a bad ro cartridge so I put a new one on and the exact same thing happens. I have the same TDS as well as speed filling the barrel. I am stumped as to what the problem is.

Sorry for the long winded explanation but I wanted to try and explain everything.