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 blew 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
● 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.
● Remove the compressor power cables.
● Remove the compressor fixing screws.
● Remove the compressor.
10.5 Conduct regular maintenance according to the user manual instruction, to make sure
the unit running in good condition.
● Fire prevention: if there is a fire, please turn off the power switch immediately, put the fire out
with fire extinguisher.
● To prevent flammable gas: the unit working environment should stay away from gasoline, ethyl
alcohol and other flammable materials, to avoid explosion accident.
● Malfunction: if malfunction occurs, should find out the reason, eliminate it and then reboot the
unit. Never boot the unit forcibly if the malfunction has not been eliminated. If refrigerant leakage
or frozen liquid leakage, please turn off all the power switch, if the unit can not stop buy
controlling switch, please turn off the general power switch.
● Never short connect the wire for protection required device, or else, in case unit malfunction, it
can not be protected normally and will damage the unit.
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