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CLCH-SVX03C-EN
91
Routine Maintenance
Accumulated dirt and other organic matter exposed to water or extended periods of high relative
humidity (60 percent or higher) can support microbial growth, which must be removed to prevent
the unit from becoming a contaminant source.
If evidence of contamination exists in either the wet or dry sections:
•
Determine and eliminate the cause.
•
Remove the contamination.
•
Sanitize the affected area.
See the
“Troubleshooting” section on page 94
for assistance in identifying the cause.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing 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.
If microbial growth on a non-porous insulating surface (closed cell insulation or sheet metal
surface) is observed:
1.
Disconnect all electrical power to the unit.
2. Wearing the appropriate personal protective equipment, use a brush for sheet metal surfaces
or a soft sponge on a foil face or closed cell foam surface to mechanically remove the microbial
growth.
Note:
Be careful not to damage the non-porous surface of the insulation.
3. Install a block-off to prevent spray from going into a dry section of the unit and/or system
ductwork.
4. Thoroughly clean the contaminated area(s) with an EPA-approved sanitizer specifically
designed for HVAC use.
5. Rinse the affected surfaces thoroughly with fresh water and a fresh sponge to prevent potential
corrosion of the drain pan and drain line
6. Repeat steps 4 and 5 as necessary.
7.
Confirm the drain line is open following the cleaning process.
8. Allow the unit to dry thoroughly before putting it back into service.
9. Replace all panels and parts and restore electrical power to the unit.
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.