Air-To-Air Plate Heat Exchangers; Cleaning The Unit; Cleaning Non-Porous Surfaces - Trane CSAA Installation, Operation And Maintenance Manual

Routine Maintenance

Air-to-Air Plate Heat Exchangers

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.
To clean air-to-air heat plate exchangers:
1. Disconnect all electrical power to the unit.
2. Wearing the appropriate personal protective
equipment, use a soft brush to remove loose debris
from the faces of the exchanger.
3. Install a block-off to prevent spray from going through
the exchanger 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
used:
a. Maintain minimum nozzle spray angle of 15
degrees.
b. Spray perpendicular to the exchanger face.
c. Use a 40 degree nozzle at least 6 inches from the
face.
d. Do not exceed 1450 psi.
6. Spray the lower sides of the exchanger first, then the
upper sides.
7. Thoroughly rinse both sides of the exchanger and the
drain pan with cool, clean water.
8. Repeat steps 6 and 7 as necessary.
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9. Straighten any plate 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.

Cleaning the Unit

Cleaning Non-Porous Surfaces

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. Failure to
disconnect power before servicing 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.
CLCH-SVX07K-EN