Trane CAH-SVX01A-EN manual Steam and Water Coils, Type K Cooling Coils, Refrigerant Coils

Routine Maintenance

See “￿ WARNING Hazardous

Voltage with Capacitors!” on page 49 regarding disconnection of power.

Coils

All coils should be kept clean to maintain maximum performance.

Steam and Water Coils

To clean steam and water coils:

1Disconnect all electrical power to the unit.

2Wearing the appropriate personal protective equipment, use a soft brush to remove loose debris from both sides of the coil.

3Insert a block-off to prevent steam from blowing through the coil and into a dry section of the unit.

4Use a steam cleaning machine to clean the coil, cleaning the leaving air side of the coil first, then the entering air side. Repeat as necessary.

Note: Start from the top of the coil and work downward.

5Straighten any coil fins that may have been damaged during the cleaning process.

6Confirm the drain line is open following the cleaning process.

7Allow the unit to dry thoroughly before putting it back into service.

8Replace all panels and parts and restore electrical power to the unit.

9Be 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:

1Remove the headers.

2Use a small nylon or fiber brush to clean the tubes.

3Flush the tubes with water.

4Install 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 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.

￿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:

1Disconnect all electrical power to the unit.

2Wearing the appropriate personal protective equipment, use a soft brush to remove loose debris from both sides of the coil.

3Install a block-off to prevent spray from going through the coil and into a dry section of the unit and/or system ductwork.

4Mix 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.

5Place the mixed solution in a garden pump-up sprayer or high- pressure sprayer. If a high pressure sprayer is to be used:

–Maintain minimum nozzle spray angle of 15 degrees.

–Spray perpendicular to the coil face.

–Keep the nozzle at least 6 inches from the coil.

–Do not exceed 600 psi.

6Spray the leaving air side of the coil first, then the entering air side.

7Thoroughly rinse both sides of the coil and the drain pan with cool, clean water.

8Repeat steps 6 and 7 as necessary.

9Straighten any coil fins damaged during the cleaning process.

10Confirm the drain line is open following the cleaning process.

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