Gree LSQWRF60VM/NhA-M - Trial Run; Routine Startup;Shutdown

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A Series Inverter Modular Air-cooled Chiller (Heat Pump)
(5) Stop the unit to drain up waste solution. If impossible, drain it with making up water at the same
time until all waster solution has been drained out completely (at this time water is transparent and
pH is 7).
(6) Repeat (4) and (5).
(7) Clean or change the lters in the water system.
(8) See if the di󰀨erence between the entering and leaving water temperature is improved.
■ Precautions
(1) Although the cleaning agent is innocuous, care also should be taken not to let it spill into eyes.
(2) The serviceman with injuries on the hand is not allowed to take this task. Check the running status
before and after cleaning, summarize the cleaning e󰀨ect and record the running data before and
after cleaning.
7.3 Trial run
(1) When the unit has not been used for a long period or the ambient temperature is below 5°C, keep
the unit energized at least 8 hours before startup to preheat the crankcase of the compressor so
as to evaporate the liquid refrigerant inside the compressor which otherwise would cause adverse
e󰀨ect on the compressor.
(2) Be sure valves are opened properly to prevent the compressor from being damaged by the
abnormal high pressure.
(3) Check the power supply and insulation conditions, and see initial settings of each control and
protection element are satisfactory, and then record relative records.
(4) Turn on the wired controller to check the error record. If any error exists, eliminate it before
restarting the unit.
(5) When a single unit has run stably, check the entering and leaving water temperature di󰀨erence, and
adjust the water damper to make the temperature di󰀨erence reach 2.5~6°C and then record related
data.
(6) When all units have run stably, check the entering and leaving water temperature difference of
each on, and adjust the water damper to make the temperature di󰀨erence reach 2.5~6°C and then
record related data.
(7) When all loads have been started and all units have run stably for one hour, check the air
conditioning and water temperature and see if they can meet the client’s requirement and then
record related data.
7.4 Routine startup/shutdown
It is recommended to start the system through the wired controller in the sequence of the water pump
rst and then the main unit, and stop the system in a reverse sequence.
When the unit is not used for a long term or temperature is below 5°C, remember to keep the
u
nit energised at least 8 hours before startup to preheat the crankcase of the compressor so as to
evaporate
t
he liquid refrigerant inside the compressor which otherwise would cause adverse e󰀨ect on the
compressor.