Trial Run; Routine Startup/Shutdown - Gree A Series Installation, Start-Up And Maintenance Manual

■ 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 effect and
record the running data before and after cleaning.
8.3

Trial Run

(1)When the unit has not been used for a long period or the ambient temperature is below
5℃, 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 effect 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, eliminated it
before restarting the unit.
(5)When a single unit has run stably, check the entering and leaving water temperature
difference, and adjust the water damper to make the temperature difference reach
2.5~6℃ 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
difference reach 2.5~6℃ 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.
8.4

Routine Startup/Shutdown

It is recommended to start the system through the wired controller in the sequence of the
water pump first 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℃, remember to 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 effect on the compressor.
When the function of the auxiliary electric heater is activated through the control panel, if the
ambient temperature is quite low and out of the nominal heating range, the control panel will
tell "As ambient temperature is low, startup is not allowed". At this point, the auxiliary electric
heater will work, with the running indicator lighting on, the water pump running but the
compressor stopped.
When the function of the auxiliary electric heater is deactivated through the control panel, if
the ambient temperature is quite low and out of the nominal heating range, the control panel
A Series Inverter Modular Air-cooled Chiller (Heat Pump)
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