Carrier’s Recommended cleaning method:

• Remove as much water and biofilm as possible from coil and pan with vacuum.
• Flush with large quantities of fast-moving water.
• Optional – Use one of the cleaning chemicals listed below in order to delay regrowth.

Directions for completely blocked drainage systems with accessible drain terminations:

• Vacuum out any slime located in the drain pan or on the fin surface.
• Optional – Pour 2 quarts of Totaline® Cooling Coil Treatment P902-1101 and let sit for 10 minutes.
• Fill drain pan with clean water.
• Attach vacuum hose to outlet of the drain termination and vacuum all liquids out of drain pan.
• Flush system with either 5 gallons of water or with a hose. For maximum effectiveness when using a bucket, be sure to fill drain pan as much as possible without overflowing.

Directions for completely blocked drainage systems without accessible drain lines:

• Vacuum out any slime located in the drain pan or on the fin surface.
• Optional – Pour 2 quarts of Totaline® Cooling Coil Treatment P902-1101 and let sit for 10 minutes.
• Insert a hose to the inlet of the drainage system in the drain pan and turn on faucet. Allow system to build pressure to dislodge blockage and then allow ample water to flow once blockage is removed.
• If blockage does not come free before drain pan fills with water, remove hose, run a long, small wire brush through the drainage system to mechanically dislodge the blockage and then repeat previous step.

Directions for drainage systems that have been partially blocked:

• Vacuum out any slime located in the drain pan or on the fin surface.
• Flush system with either 5 gallons of water or with a hose. For maximum effectiveness when using a bucket, be sure to fill drain pan as much as possible without overflowing.
• Optional – Use Totaline® Cooling Coil Treatment P902-1101, add slowly allowing chemical to interact with biofilm in drainage system and then flush with large quantities of water.

Directions for a continuous disinfectant method between preventative maintenance:

• Use Totaline® Condensate Pan Strip P902-38003 through P902-38007 based on size of the cooling system.
• Place close to the drain pan outlet. Testing has shown to delay the growth of biofilm downstream of the pan strip.
• This product is currently available in the following states: AL, AR, CO, CT, FL, HI, LA, MA, MD, ME, MS, NC, NH, NJ, NY, OK, PA, RI, SC, TN, TX, VA, WV. Certifications for additional states are currently being pursued. 
• Strips will need to be replaced and a new strip inserted on a regular PM schedule.