Routine Maintenance
CLCH-SVX07K-EN 145
10. Be careful any contaminated material does not contact
other areas of the unit or building. Properly dispose of
all contaminated materials and cleaning solution.
Cleaning Porous Surfaces
To clean a porous insulating surface (fiberglass
insulation):
1. Disconnect all electrical power to the unit.
2. Wearing the appropriate personal protective
equipment, use a vacuum device with a HEPA filter
(99.97 percent efficient at 0.3 micron particles) to
remove the accumulated dirt and organic matter.
Note: Be careful not to tear the insulation surface or
edges.
3. Confirm the drain line is open following the cleaning
process.
4. Allow the unit to dry thoroughly before putting it back
into service.
5. Replace all panels and parts and restore electrical
power to the unit.
6. Be careful any contaminated material does not contact
other areas of the unit or building. Properly dispose of
all contaminated materials and cleaning solution.
Coils
All coils should be kept clean to maintain maximum
performance.
Steam and Water Coils
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.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
WARNING
Hazardous Chemicals!
Failure to follow all safety instructions could result in
death or serious injury. Coil cleaning agents can be
either acidic or highly alkaline and can burn severely if
contact with skin occurs. Handle chemical carefully and
avoid contact with skin. ALWAYS wear Personal
Protective Equipment (PPE) including 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.
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