Midea Aqua Tempto Power Series, Manual

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Aqua tempo power series tropical air-cooled scroll chiller 50Hz MCAC-ATSM-2014-09
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5.3 Trial run
1) Start up the controller and check whether the unit
displays a fault code. If a fault occurs, remove the
fault first, and start the unit according to the
operating method in the “unit control instruction”,
after determining that there is no fault existing in the
unit.
2) Conduct trial run for 30 min. When the influent
and effluent temp. becomes stabilized, adjust
the water flow to nominal value, to ensure normal
operation of the unit.
3) After the unit is shut down, it should be put into
operation 10 min later, to avoid frequent start-up of
the unit. In the end, check whether the unit meets
the requirements according to the contents in upper
table.
CAUTION
The unit can control start-up and shut-down of the
unit, so when the water system is flushed, the
operation of the pump should not be controlled by
the unit.
Do not start up the unit before draining the water
system completely.
The water flow switch must be installed correctly.
The wires of the water flow switch must be
connected according to electric control schematic
diagram, or the faults caused by water breaking
while the unit is in operation should be the user’s
responsibility.
Do not re-start the unit within 10 min after the unit is
shut down during trial run.
When the unit is used frequently, do not cut off the
power supply after the unit is shut down; otherwise
the compressor cannot be heated, thus leading to its
damages.
If the unit is not in service for a long time, and the
power supply needs to be cut off, the unit should be
connected to the power supply 12 hours prior to
re-starting of the unit, to pre-heat the compressor.
. Trail run and operation data
Temp. The table below contains the measurable temp.
Measurement Value
Outlet water temp.
Standard cooling :5~17ºC
Standard heating:45~50 ºC
Outdoor temp.
Standard cooling :10~52ºC
Standard heating:-10~21 ºC
Voltage Current The table below contains the measurable voltage.
Measurement Value
Power supply voltage Within
±
10% of the rated voltage.
Phase imbalance Within
±
2% of the rated voltage.
Control circuit voltage
220V AC for main electromagnetic switches,
220V AC for controller.
Current
The table below contains the currents and fuses.
Model Maximum current(A) Fuse
MGBT-F25W/RN1 50 36
MGBT-D25W/RN1 50 36
MGBT-F30W/RN1 50 36
MGBT-D30W/RN1 50 36
MGBT-F60W/RN1 125 100
MGBT-D60W/RN1 150 100
MGBT-F120W/RN1 250 200
MGBT-F180W/RN1 350 300
MGBT-F250W/RN1 450 300