Unit installation

Maintenance
SCXF-SVX01K-EN 89
Coil Fin Cleaning
Keep coils clean to maintain maximum performance. For
operation at its highest efficiency, clean the refrigerant coil
often during periods of high cooling demand or when dirty
conditions prevail. Clean the coil a minimum of once per
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 refrigerant coils with cold water and detergent, or
with one of the commercially available chemical coil
cleaners. Rinse coils thoroughly after cleaning.
Economizer and evaporator coils are installed so the
evaporator is directly behind the economizer. To clean
between the coils, remove the sheet metal block off.
Access the block off by removing the corner panels on the
unit’s left or right rear side.
If the refrigerant coil is installed back to back with the
waterside economizer coil, use a cleaner that is acceptable
for cleaning both types of coils.
Inspecting and Cleaning Coils
Coils become externally fouled as a result of normal
operation. Coil surface dirt reduces heat transfer ability
and can cause comfort problems, increased airflow
resistance and thus increased operating energy costs.
Inspect coils at least every six months or more frequently
as dictated by operating experience. Cleaning frequently
is dependent upon system operating hours, filter
maintenance, efficiency, and dirt load. Following is the
suggested method for cleaning steam and hot water coils.
Steam and Hot Water Coils
1. Disconnect all electrical power to the unit.
2. Wear the appropriate personal protective equipment
(PPE).
3. Access both sides of the coil section.
4. Use a soft brush to remove loose debris from both
sides
of the coil.
5. Use a steam cleaning machine, starting from the top of
the
coil and working downward. Clean the leaving air
side of the coil first, then the entering air side. Use a
block-off to prevent steam from blowing through the
coil and into a dry section of the unit.
6. Repeat step 5 as necessary. Confirm that the drain line
is
open following completion of the cleaning process.
7. Allow the unit to dry thoroughly before putting the
system
back into service.
8. Straighten any coil fins that may be damaged with a fin
rak
e.
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.
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of
capacitors.Verify with an appropriate voltmeter that all
capacitors have discharged. Failure to disconnect
power and discharge capacitors before servicing could
result in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
NOTICE:
Equipment Damage!
Do not clean the refrigerant coil with hot water or
steam.The use of hot water or steam as a refrigerant
coil-cleaner agent could cause high pressure inside the
coil tubing and subsequent damage to the coil.
Do not use acidic chemical coil cleaners. Also, do not
use alkaline chemical coil cleaners with a pH value
greater then 8.5 (after mixing) without using an
aluminum corrosion inhibitor in the cleaning solution.
Use of the chemical could result in equipment damage.
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of
capacitors.Verify with an appropriate voltmeter that all
capacitors have discharged. Failure to disconnect
power and discharge capacitors before servicing could
result in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN