88
CLCH-SVX03C-EN
Routine Maintenance
6. Spray the leaving air side of the coil first, then the entering air side.
7.
Thoroughly rinse both sides of the coil and the drain pan with cool, clean water.
8. Repeat steps 6 and 7 as necessary.
9. Straighten any coil fins that may have been damaged during the cleaning process.
10. Confirm the drain line is open following the cleaning process.
11. Allow the unit to dry thoroughly before putting it back into service.
12. Replace all panels and parts and restore electrical power to the unit.
13. Be careful any contaminated material does not contact other areas of the unit or building.
Properly dispose of all contaminated materials.
Type K Cooling Coils
Type K cooling coils have removable headers for cleaning:
1.
Remove the headers.
2. Use a small nylon or fiber brush to clean the tubes.
3. Flush the tubes with water.
4. Install a new rubber sealing gasket and be sure it seats properly when the header is replaced.
Note:
Apply washers under the bolt heads. Bolts should be evenly tightened to 50 foot-pounds of
torque, beginning in the center and working toward the outside.
Refrigerant Coils
WARNING
Hazardous Pressures!
Coils contain refrigerant under pressure. When cleaning coils, maintain coil cleaning solution
temperature under 150°F to avoid excessive pressure in the coil. Failure to follow these safety
precautions could result in coil bursting, which could result in death or serious injury.
To clean refrigerant coils:
1.
Disconnect all electrical power to the unit.
2. Wearing the appropriate personal protective equipment, use a soft brush to remove loose
debris from both sides of the coil.
3. Install a block-off to prevent spray from going through the coil and into a dry section of the unit
and/or system ductwork.
4. Mix a high-quality coil cleaning detergent with water according to the manufacturer’s
instructions.
Note:
If the detergent is strongly alkaline after mixing (PH 8.5 or higher), it must contain an
inhibitor. Follow the cleaning solution manufacturer’s instructions regarding the use of the
product.