Maintenance
Coil Maintenance
Keep coils clean to maintain maximum performance. For operation at its highest efficiency, clean the coil often during periods of high demand or when dirty conditions prevail. Clean the coil a minimum of once per year to prevent dirt buildup in the coil fins, where it may not be visible.
Remove large debris from the coils and straighten fins before cleaning. Remove filters before cleaning. Rinse coils thoroughly after cleaning. Clean the coil fins using one of these methods:
•steam with detergent
•hot water spray and detergent
•commercially available chemical coil cleaner
NOTICE
Potential unit damage from coil cleaners!
Do not use acidic chemical coil cleaners. Also, do not use alkaline chemical coil cleaners with a pH value greater then 8.5 (after mixing) without using an aluminum corrosion inhibitor in the cleaning solution. Using these types of cleaners could result in equipment damage.
Inspecting and Cleaning Coils
Coils become externally fouled as a result of normal operation. Dirt on the coil surface reduces its ability to transfer heat and can cause comfort problems, increased airflow resistance and thus increased operating energy costs. If the coil surface dirt becomes wet, which commonly occurs with cooling coils, microbial growth (mold) may result, causing unpleasant odors and serious
Inspect coils at least every six months or more frequently as dictated by operating experience. Cleaning frequently is dependent upon system operating hours, filter maintenance, and efficiency and dirt load. Follow is the suggested method below:
Steam, Hot Water, and Cooling Coil Cleaning Procedure
1.Don the appropriate personal protective equipment (PPE).
2.Gain access to both sides of the coil section.
3.Use a soft brush to remove loose debris from both sides of the coil.
4.Use a steam cleaning machine, starting from the top of the coil and working downward. Clean the leaving air side of the coil first, then the entering air side.
Use a
5.Repeat Step 4 as necessary. Confirm that the drain line is open following completion of the cleaning process.
6.Allow the unit to dry thoroughly before putting the system back into service.
7.Straighten any coil fins that may be damaged with a fin rake.
8.Replace all panels and parts and restore electrical power to the unit.
9.Ensure that contaminated material does not contact other areas of the unit or building. Properly dispose of all contaminated materials and cleaning solutions.
WARNING
Hazardous chemicals!
Coil cleaning agents can be either acidic or highly alkaline. Handle chemical carefully. Proper handling should include goggles or face shield, chemical resistant gloves, boots, apron or suit as required. For personal safety refer to the cleaning agent manufacturer’s Materials Safety Data Sheet and follow all recommended safe handling practices. Failure to follow all safety instructions could result in death or serious injury.
| 69 |