CellarPro 4000SWC SPLIT SYSTEM WATER COOLED, 7649 - Manual (Page 13)

13 V10.14
Condensate Drain Line
The condensate drain line should drop, then rise (but stay below the height of the
fitting), and then drop again into an open drain. Then, fill the trap with water. The
condensate trap will allow any excess moisture inside the Evaporator to
overcome the static pressure and flow out of the drain line. Before putting the unit
into service, test for positive drainage by pouring water into the drain pan and
observing flow through to the final drain.