Thanks @Rob A and @scott711
As advised by Rob I ran the water through the bottom and out through the top.. I came back from work and saw the temperature was under control around 79.2. I programmed the reef-keeper to turn on if the temperature goes above 79.2
I cannot find the sticker with the model number and make for the chiller so Im using a small pump a little bigger then the MJ1200 which I was using to fix salt, I just used that pump..
Service ppl will take another week to fix my AC .. I using fans to cool down my other 2 tanks..