Inspecting and
Cleaning Drain
Pans
Clean the
Check the condensate drain pan and drain line to assure the conden- sate drains properly at least every six months or as dictated by operating experience.
If evidence of standing water or condensate overflow exists, immedi- ately identify and remedy the cause. Refer to Table 40 on page 99 for possible causes and solutions. If the drain pan contains microbial growth, clean and remove it immediately.
Clean drain pans using the following procedure:
1.Disconnect all electrical power to the unit.
2.Don the appropriate personal protective equipment (PPE).
3.Remove all standing water.
4.Use a scraper or other tool to loosen any solid matter. Remove solid matter with a vacuum device that utilizes high efficiency particu- late arrestance (HEPA) filters with a minimum efficiency of 99.97% at 0.3 micron particle size.
5.Thoroughly clean the contaminated area(s) with a mild bleach and water solution or an
6.Immediately rinse the drain pan thoroughly with fresh water to prevent potential corrosion from the cleaning solution of the drain pan and drain line components.
7.Allow the unit to dry thoroughly before putting the system back into service.
8.Determine and correct the cause of the microbial contamination.
9.Be careful that the contaminated material does not contact other areas of the unit or building. Properly dispose of all contaminated materials and cleaning solution.
Note: Standing water in drain pans can promote microbial growth (mold) which may cause unpleasant odors and
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