For the most part evaporator condensate traps are required by the manufacturer help to meet the energy efficiency standards as without it air will blow through that hole. If there is a trap tell them tho clean it all the time because it'll clog and when it does they might call you.

Where do you drain a condensate pump?

The first and easiest option is to allow condensate to drain using gravity, from the drain pan to one of the following: main sewer drain line, floor drain, sump pit, laundry sink, window, or through the wall to the outdoors.

Why must a condensate drain be trapped?

Condensate drains typically have traps, which are designed to keep air from moving in or out of the air handler without preventing condensate drainage. The absence of a properly working p-trap could push unfiltered air into your home and cause an overflow of the condensate drain.