Trane Flex II Series Installation Operation & Maintenance page 36

In case the superficial oxidation and the corrosion are not properly controlled and stopped in time, cause a thickness
reduction with a consequent reduction of the receivers' mechanical resistance.
Use antioxidant paint or products to protect.
14.3 STANDARD CONTROLS
It is mandatory to clean regularly the coils for a proper unit operation. Pollution and other residual material elimination
helps extend the life of the coils and the whole unit
Temperature and pressure probes
check that their measurements are correct by means of sample instruments (manometers, thermometers); correct
readings if necessary using the microprocessor keyboard. Well- calibrated sensors ensure better efficiency for the unit
and a longer lifetime.
Note: refer to the microprocessor use and maintenance manual for a complete description of applications, setting and
adjustments.
All sensors are preassembled and connected to the microprocessor. The descriptions of each sensor are listed below:
Outgoing water temperature sensor –This sensor is located on the evaporator outgoing water connection and is used
for antifreeze protection.
IMPORTANT
In case a temperature control based on ingoing water temperature is needed please contact Trane before carrying
out any trying to set it autonomously.
Ingoing water temperature sensor –This sensor is located on the evaporator ingoing water connection and is used for
monitoring the return water temperature.
It is used by the microprocessor to control the unit load according to the system thermal load.
External air temperature sensor –This sensor allows to monitor the external air temperature on the microprocessor
display.
High pressure transducer –This is installed on every circuit and allows to monitor the delivery pressure and to control
the ventilators. Should an increase in condensation pressure occur, the microprocessor will control the circuit load in
order to allow it to function. It contributes to complementing the oil control logic.
Low-pressure transducer –This is installed on every circuit and allow to monitor the compressor suction pressure
along with low pressure alarms. It contributes to complementing the oil control logic.
14.4 MICROCHANNEL CONDENSER COIL – CLEANING PROCEDURES
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 FLEX II coils. Use clean water only.
Use of coil cleaning agents on uncoated FLEX II coils could cause damage to coils.
Operations description
Compressors oil level check
Inlet temperature check (overheating)
Water circuits filling check
Fans and compressors motors electrical
input check
Power supply and auxiliary power
voltage check
Refrigerant charge check through sight
glass
Compressors carter heaters operation
check
Tightening all electrical connections
Coils cleanliness
Compressors and liquid circuit solenoid
valve check
Adjusting and safety thermostat
calibration check
Fans and compressors contactors state
check
Evaporator heater operation check
Motor and fan bearing noise check
Pressure vessels conditions check
– The unit comes factory-equipped with all the sensors listed below. Periodically
Recommended
basis
monthly
monthly
monthly
monthly
monthly
monthly
monthly
monthly
monthly
semiannual
quarterly
quarterly
quarterly
semiannual
yearly
36