Trane CXAU - Page 48

48
PKGP-SVX19A-EN
Maintenance
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WARNING
Do not use steam to clean the condenser, otherwise it will cause the internal pressure to rise and make the
refrigerant pressure higher than design pressure, refrigeration system leakage after destruction.
Inspection and cleaning of the evaporator
Please check the water temperature of the evaporator entering and leaving regularly, and compare the saturated evaporation
temperature during cooling or the saturated condensation temperature during heating. For an e󰀨ectively working evaporator,
the di󰀨erence between the average water temperature at the inlet and outlet and the refrigerant saturated evaporation
temperature during cooling or the refrigerant saturated condensation temperature during heating should be between 3~8 °C. If
the di󰀨erence is greater than this range, it indicates that the e󰀩ciency of the heat exchanger has decreased.
Since certain chemical treatments are required during cleaning heat exchangers, cleaning must be done by professionals.
Refrigerant and Lubricating Oil Charge
Each unit is charged with the appropriate refrigerant and the corresponding lubricant. If the refrigeration circulation system
is working properly and no maintenance or other maintenance work is required, do not charge or replace the refrigerant and
lubricating oil at will. Under normal conditions, the refrigerant and lubricating oil in the machine can be used all the time. If the
refrigerant must be recharged due to leakage, please use the refrigerant required by the nameplate, the refrigerant charge
refers to the unit nameplate, it is recommended to charge 50 ml of compressor lubricating oil after each unit refrigerant
leakage, the compressor lubricating oil model is as follows. Before recharging the refrigerant, be sure to vacuum the system
below 46Pa.
Compressor brand Lube oil brand/model
COPELAND EMKARATE / RL 32-3MAF
DANFOSS EMKARATE / RL 32H
*The above lubricants are suitable for R410A refrigeration systems
Inspection and cleaning of water ow switches
Since impurities cannot be avoided in the water, with the increase of running time impurities will accumulate, the reliable
operation of the water ow switch will be a󰀨ected. It is recommended that customers clean or replace the water ow switch
every two years. If the water quality in the system is poor, the clean or replacement cycle should be shortened.