CPC F28G 1/166 (2013.01) [B01D 21/267 (2013.01); B08B 3/024 (2013.01); B08B 3/14 (2013.01); B08B 17/025 (2013.01); F28G 9/00 (2013.01); F28G 15/003 (2013.01); F28G 2015/006 (2013.01)] | 20 Claims |
1. A method of cleaning an HVAC coil unit located above a drain basin, said method comprising steps of:
providing a supply and collection assembly having a reservoir containing liquid cleaning solution, a pump operative to output the liquid cleaning solution through a supply outlet, and a vacuum source operative to draw in used liquid cleaning solution through a collection inlet;
providing a nozzle device in fluid communication with the supply outlet, said nozzle device having a delivery face;
providing a fluid return tool in fluid communication with the collection inlet, and positioning the fluid return tool in the drain basin; and
moving the delivery face of the nozzle device across a surface of the HVAC coil unit to deliver the cleaning solution into areas between fins thereof in a volume of at least 40 gallons per minute.
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