Trane R Series Installation Operation & Maintenance page 138

Maintenance
Chemical Cleaning (RTWA)
Chemical cleaning is the most satisfactory method of cleaning scale from the
condenser. With this treatment, scale is dissolved and flushed away by circu-
lating a chemical solution through the tubes and headers.
Internal condenser components are composed of copper, steel and cast iron.
With this information, water treatment firms will be able to recommend a
suitable chemical for this purpose. If water treatment is not available, consult
a chemical supply house.
Figure 43 illustrates a typical chemical cleaning arrangement. All materials
used in the chemical (external) circulating system, quantity of cleaning
material, duration of cleaning and any safety precautions relative to the
handling of the cleaning agent must be provided or approved by the supplier
of the cleaning agent.
RTCA Coil 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.
Clean the condenser coils at least once each year, or more frequently if the
unit is located in a "dirty" environment. This will maintain proper unit
operating efficiencies. Follow the detergent manufacturer's instructions as
closely as possible to avoid damage to the coils.
To clean the coils, use a soft brush and a sprayer, either a garden, pump-up
type or a high-pressure type. A high-quality detergent, such as "Trane Coil
Cleaner, CHM-0002" is recommended for standard and Copper coils.Refer to
RTAC-SVG01B-EN for maintenance and cleaning procedures coated coil
NOTE: If the detergent mixture is strongly alkaline (pH value greater than
8.5), an inhibitor must be added.
138 RLC-SVX07A-EN