Page 30
14.2
STANDARD CONTROLS
It is mandatory to clean regularly the coils for a proper unit operation. Pollution and other residual material clearing help
extend the life of the coils and the whole unit
Operations description
Recommended
basis
Compressors oil level check
monthly
Inlet temperature check (overheating)
monthly
Fans and compressors motors electrical input
check
monthly
Power supply and auxiliary power voltage
check
monthly
Refrigerant charge check through sight glass
monthly
Compressors carter heaters operation check
monthly
Tightening all electrical connections
monthly
Coils cleanliness
monthly
Compressors and liquid circuit solenoid valve
check
semiannual
High pressure switch check
quarterly
Fans and compressors contactors state check
quarterly
Motor and fan bearing noise check
semiannual
Pressure vessels conditions check
yearly
14.3
MICROCHANNEL CONDENSER COIL – CLEANING PROCEDURES (ONLY ON
RAUS)
It is mandatory to clean regularly the coils for a proper unit operation. Eliminate pollution and other residual material help to
extend the life of the coils and the unit
CAUTION! Equipment Damage!
Do not use coil cleaning agents to clean uncoated RAUS coils. Use clean water only.
Use of coil cleaning agents on uncoated RAUS coils could cause damage to coils.
• Regular coil maintenance, including annual cleaning enhances the unit operating efficiency by minimizing compressor
head pressure and amperage draw. The condenser coil should be cleaned at least once each quarter or more if the unit is
located in a “dirty” or corrosive environment. Cleaning with cleansers or detergents is strongly discouraged due to the all-
aluminum construction; straight water should prove sufficient, if not please contact TRANE. Any breach in the tubes can
result in refrigerant leaks
IMPORTANT
:
Only in extreme cases should any type of chemical cleaner or detergent be used on microchannel coils. If it
becomes absolutely necessary because water alone did not clean the coil, specify a cleaner that is:
•
A is pH neutral cleaner.
• An alkaline cleaner that is no higher than 8 on the pH scale.
• An acidic cleaner that is no lower than 6 on the pH scale.
• Does not contain any hydrofluoric acids.
Be sure to follow the instructions provided with any cleaner chosen. Keep in mind that it is still MANDATORY that the coils
are thoroughly rinsed with water after the application of the cleaner even if the instructions specify a “No Rinse” cleaner.
Cleaners or detergents that are left on the coil due to improper rinsing will significantly increase the possibility of corrosion
damage on the microchannel coil.
Note: Quarterly cleaning is essential to extend the life of an E-coated coil and is required to maintain warranty
coverage. Failure to clean an E-coated coil will void the warranty and may result in reduced efficiency and
durability in the environment.
WARNING! Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/ tagout procedures to
ensure the power cannot be inadvertently energized. Failure to disconnect power before servicing could result in death or
serious injury.
1. Disconnect Power to the unit.
2. Wear proper personal protection equipment such as a face shield, gloves and waterproof clothing.
3. Remove enough panels from the unit to gain safe access to the microchannel coil.
