W'eau WFI-007, Installation & Operation Manual, Page: 21 / 64

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8. Operation and maintenance
8.1 To ensure the well functioning, the system should be checked and maintained after a
period of time. During the maintenance, please pay attention to some points below:
● When you need open the cabinet and make inside inspection, please do cut off the electricity
power in advance.
● To ensure the stable running, please do not adjust any setting.
● Pay close attention to whether all the operation parameters is normal during system working.
● Examine regularly whether the electrical connection is loose, if yes, fasten it on time.
● Examine regularly the reliability of the electrical components, change all the failed or unreliable
components on time.
● The dirt retention on the surface of evaporator fin should be cleaned every 6 months.
● After long downtime, if we restart the equipment, we should make following preparations: examine
and clean the equipment carefully, clean the water pipeline system, examine the water pump, and
fasten all the wire connections.
● Replacement parts must use the original accessories, can not be replaced by other similar
accessories.
8.2 Refrigerant filling
Examine the refrigerant filling condition through reading the data of gauge, also the air suction and
exhaust pressure. If there is leakage or changing components of the refrigeration circulation system,
please ask for the assistant of professional technicians.
8.3 Leak detection
During leak detection and air tightness experiment, never let the refrigeration system filling oxygen,
ethane or other flammable harmful gas, we can only adopt compressed air, fluoride or refrigerant for
such experiment.
8.4 Drainage water in heat exchanger
If the heat pump will be not used for a long time or in winter season, please do drain the water inside
heat exchanger to avoid broken when freezing.
8.5 To remove the compressor, please follow the following steps
● Turn off the power supply
● Exhaust the refrigerant from the low pressure end, attention to reduce the exhaust speed, and
avoid frozen oil leakage.
● Remove the compressor air suction and exhausting pipe.