10. Operation and maintenance
10.1 Personals shall possess professional knowledge or operate according to
professionals from our company. To ensure the well functioning, the system shall be
checked and maintained after a period of time. During the maintenance, please pay
attention to some points below:
● Control and protect the equipment, please do not adjust any settings discretely.
● 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.
● There will be calcium oxidized or other mineral substance deposition on the surface of water heat
ex-changer copper coil after long period of operation, which will influence the heat exchange
performance and lead to high electrical consumption, discharge pressure increasing and air suction
pressure drop, unit hot water volume produced is less. We can adopt formic acid, citric acid, acetic
acid or other organic acid to clean.
● The dirt retention on the surface of evaporator fin should be blowed by more than 0.6Mpa
compressor air, brushed by fine copper wire, or flushed by high pressurized water, usually one time
per month; if too much dirt, we can use paintbrush dipping gasoline to clean.
● 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 our company original accessories, can not be replaced by other
similar accessories.
10.2 Refrigerant filling
Examine the refrigerant filling condition through reading the data of liquid level from display screen,
also the air suction and exhaust pressure. If there is leakage or changing components of the
refrigeration circulation system, we have to make air tightness examination first.
10.3 Leak detection and air tightness experiment:
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.
10.4 To remove the compressor, please follow the following steps
● Turn off the power supply
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