Trane AM4A0A18S11SA Series, Installation, Operation And Maintenance Manual

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CLCH-SVX07C-EN 125
Routine Maintenance
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedure to ensure the power cannot be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
To clean steam and water 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.
5. Place 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.
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.
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.
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.