Routine Maintenance
UNT-SVX07E-EN
125
and remove pan from unit (see
Figure 95
).
Replacing Drain Pan
When replacing the main drain pan on a horizontal unit,
install correctly under the Z-bar. See
Figure 96
.
Cleaning Drain Pan
The condensate drain pan and drain line must be checked
to assure the condensate drains as designed. This
inspection should occur a minimum of every six months or
more often as dictated by operating experience.
If evidence of standing water or condensate overflow
exists, identify and remedy the cause immediately. Refer
to
“Diagnostics and Troubleshooting”, page 129
for
possible causes and solutions.
To clean drain pans:
1.
Disconnect all electrical power to the unit.
2. Wearing the appropriate personal protective
equipment, remove any standing water.
3. Scrape solid matter off of the drain pan.
4. Vacuum the drain pan with a vacuum device that uses
high-efficiency particulate arrestance (HEPA) filters
with a minimum efficiency of 99.97 percent at
0.3 micron particle size.
5. Thoroughly clean any contaminated area(s) with a
mild bleach and water solution or an EPA-approved
sanitizer specifically designed for HVAC use.
6. Immediately rinse the affected surfaces thoroughly
with fresh water and a fresh sponge to prevent
potential corrosion of metal surfaces.
7.
Allow the unit to dry completely before putting it back
into service.
8. Be careful any contaminated material does not contact
other areas of the unit or building. Properly dispose of
all contaminated materials and cleaning solution.
Figure 95.
Insert the auxiliary drain pan tabs into slots
Figure 96.
Replace main drain pan on horizontal unit
Auxiliary pan attaches to slots
Z-Bar
Main
drain
Coil
Side
WARNING
Hazardous Chemicals!
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. Failure to
follow all safety instructions could result in death or
serious injury.
