Arkansas HVACR NewsMagazine November 2021

HVACR NewsMagazine November 2021

Tech News

Condensate

Finally, we reach the infamous condensate area of the system. Failing to check the condensate drain is the #1 reason for callbacks in hot and humid climate areas. If the drain is not set up properly, it can cause the system to shut down due to a tripped float switch. Or worse, it can cause expensive water damage. To really commission the condensate side of a system, there are two main points to consider:

Is the unit draining?

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Is the float switch working?

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To make sure the unit is draining properly, the cabinet itself must be level. On very rare

Another important detail is to make sure the drain line, including the trap and at least 5ft of a horizontal run, is insulated. Many times, the drain line is located in unconditioned spaces and will begin to sweat and drip once cool condensate begins to run through it. To prevent potential water damage, insulate the drain line. If there is a condensate pump installed, take care to ensure the vinyl tubing of the pump won't kink over time. Make sure the pump reservoir is clean and actually operating properly.

occasions, the cabinet may need a slight tilt towards the primary drain port. However, in typical applications, the appliance should be perfectly level. The drain should always be trapped. It doesn’t matter if the cabinet is positive or negative pressure. Even positive-pressure cabinets can benefit from a condensate trap because it will prevent air loss. If the drain is gravity-fed, the pitch of the horizontal section of the drain line should be about ¼” every 1 foot, and there should be a clean-out tee and vent installed for easy maintenance. A clean-out tee that is installed before the trap should be capped off.