UNT-SVX07B-EN 103
Maintenance
Horizontal Units. To remove the main drain pan on a horizontal fan-coil unit, peel the insulation
from the edges of the pan’s underside to access the mounting screws. Remove the screws and
lower the end of the drain pan closest to the control box. Remove the drain spout by pulling it from
the hole in the chassis end panel (see Figure 27).
Note: Do not operate the fan-coil unit without the main and auxiliary drain pans in place to prevent
condensate leakage.
Coil Maintenance
Keep coils clean to maintain maximum performance. For operation at its highest efficiency, clean
the coil often during periods of high demand or when dirty conditions prevail. Clean the coil a
minimum of once a year to prevent dirt buildup in the coil fins, where it may not be visible.
Remove large debris from the coils and straighten fins before cleaning. Remove filters before
cleaning.
Clean the coil fins using steam with detergent, hot water spray and detergent, or a commercially
available chemical coil cleaner. Be sure to rinse coils thoroughly after cleaning.
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.
Figure 26. To remove the main drain pan on vertical fan-coil units, disconnect the clips holding
the pan to the fanboard.
Figure 27. To remove the main drain pan on horizontal fan-coil units, peel the insulation from the
edges of the pan’s underside to access the mounting screws.
Clips Hold Drain Pan in Place
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