It can carry 5 gallons of water or can be connected to the building water supply for continuous operation. The Model CC-140 is a self contained two-wheeled cart with its own built in water and chemical tanks that can operate on building power or an integrated rechargeable battery. Recently, Goodway introduced its line of CoilProâ„¢ coil cleaning machines. Water leaving the coil should be free of particulate. Care must be taken when using a pressure washer to avoid damaging the fins on the tubes. A cleaning solution can be applied before the pressure rinse using the built in chemical injection system on the pressure washer or a hand sprayer. Pressure cleaning should be done in the opposite direction of air flow through the coil. Pressure cleaning coils may increase airborne Macromolecular Organic Dust (MOD) which must be contained to the area being cleaned. Perhaps the most popular cleaning method used in recent years is using pressure washers to clean coils. Finally, the coil is rinsed with clean water from a hose. The foam is then vacuumed up and the process repeated. The foam is allowed to dwell on the surface to saturate the fins. Steam must be applied at low pressure and the stream kept parallel to the fins to prevent folding the fins over.Īnother popular coil cleaning method employs the use of a garden-type pump sprayer to apply foaming chemical to the coil surfaces. More aggressive deposits call for the use of stronger cleaning solutions or solvents as required.Ĭoils can be steam cleaned but require extra care. Applying a plain water or mild detergent solution to the surface, allowing it to sit for a short time then rinsing is employed in some cases. If the coil is contaminated with a light dust or dirt not adhered to the fins, blowing low pressure compressed air across the fins or the use of a soft bristle brush may be sufficient. This will make the job much easier and consequently, the more likely to be done when coil cleaning is necessary. If they do not already exist, install easy to open panels to gain access to the coils. This can be as often as four times a year (monthly cleaning is reported in some areas). A failed compressor means no cooling and costly repair.Ī coil cleaning program should be instituted when the coils are new, clean, and should be performed with a frequency to prevent deterioration of the coils. Dirty coils increase operating pressure and temperatures that breakdown the compressor’s lubricant and can result in equipment failure. Additionally, a dirty system’s cooling capacity can be reduced by as much as 30%. Equipment operating with dirty coils can use up to 37% more energy than those with clean coils. If not maintained, the moisture around the evaporator coil can become a breeding ground for bacteria and mold.Ī coil fouled with dirt and grime cannot supply proper heat transfer and results in greater energy consumption. In addition, the evaporator coil and its condensate pan can become fouled with pollen, mold spores and other biocontaminants that can have adverse effects on indoor air quality. As the air moving over the coils contains dust, dirt, pollen, moisture and other contaminants, the coils get dirty and become less efficient. It is not uncommon to find hundreds of "through-the-wall" fan coil units in a hotel, dormitory or apartment building. The condenser coil or outdoor coil is the "warm" coil as it rejects the heat as a fan blows outside air over the surface.Ĭoils are found in refrigeration equipment including those used in supermarkets and restaurants. The coil works by absorbing heat from the indoor air that is blown over by the air handler's fan. The evaporator coil, or indoor coil, is often described as the "cold" coil because it provides indoor cooling. An air conditioning system has two coils, usually made of copper tubes with aluminum fins.
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