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58
Maintenance
WARNING
Hazardous Pressures!
Coils contain refrigerant under pressure. When cleaning coils,
maintain coil cleaning solution temperature under 1500F to avoid
excessive pressure in the coil. Failure to follow these safety
precautions could result in coil bursting, which could result in death or
serious injury.
7. Place the cleaning solution in the sprayer. Be sure to follow these guide-
lines if a high-pressure sprayer is used: (1) minimum nozzle spray angle
is 15 degrees; (2) spray solution at 90 degrees to the coil face; (3) keep
sprayer nozzle at least six inches from the coil; and, (4) sprayer pressure
must not exceed 600 psi.
8. Spray the leaving air side of the coil first; then spray the entering air side
of the coil. Allow the detergent-and- water solution to stand on the coil for
5 minutes.
9. Rinse both sides of the coil with cool, clean water.
10.Inspect the condenser coil. If it still appears to be dirty, repeat Steps 7
and 8.
11.Remove protective covers installed in step 3.
12.Reinstall all unit components and panels; then restore electrical power to
the unit.
Cleaning the Evaporator
The chilled water system is a closed loop. It should not accumulate a large
amount of scale or sludge. Inlet strainer should be cleaned periodically. If the
chiller is fouled, first try to dislodge foreign material by back-flushing the sys-
tem several times. If this does not work, take a water sample from the evap-
orator and analyze it. Determine treatment based on the findings.
CAUTION
Evaporator Damage!
Do not use an acidic type cleaning agent. Failure to follow these
instructions may result in damage to the internal evaporator
components.
Water Treatment
CAUTION
Proper Water Treatment!
The use of untreated or improperly treated water in an Air-Cooled Cold
Generator may result in scaling, erosion, corrosion, algae or slime. It is
recommended that the services of a qualified water treatment special-
ist be engaged to determine what water treatment, if any, is required.
Trane assumes no responsibility for equipment failures which result
from untreated or improperly treated water, or saline or brackish water.
CSRA-SVX01A-EN
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