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LG
Air-Cooled Cooling Only Inverter Scroll Chiller Installation and Owners Manual
Test Run
Checks Before Test Run
Before starting the chiller, check the supplementary devices such as the water circulation, water pump, air handler unit, etc. (see manufac-
turer’s directions for operation information). Verify that all parts are installed properly and accurately; check if the wiring is installed correctly.
Refer to the wiring diagrams.
• Check the flow switch for appropriate operation; verify if the sensor is functioning properly.
• For cooling, fill the water circuit with clean water. Purge the air so no air remains inside the water circuit. If the outdoor temperature is
expected to drop below 32°F, add anti-freeze to the water circuit to prevent freezing. The water circuit must be cleaned before connecting it
to the chiller.
• Check and inspect all water piping. Check if the water is flowing in the correction direction, and if it is properly connected to the evaporator.
Open all flow valves to the evaporator.
• Turn on the water pump. Measure the decrease in overall water pressure to check whether the flow is accurate. Compare it to the designed
flow rate.
• Check all electric connections in the control panel. Verify all parts are tightly assembled with good contact conditions. Although the control
panel connections are inspected at the factory, these can become loose from vibration during transportation.
• Check and inspect all fuses. All fuses in the power panel / control panel must be installed at an appropriate location.
Initial Operation
• Check if the load is operating on the air processing device (or any other device) on the water supply side to the chiller. If the temperature of
the water is too high, the initial operation of the load device can be delayed.
• If the chiller auto control is not working, check if the water circulation pump is operating.
• Voltage variance must be within ±10%, Check that the phase voltage imbalance is not exceeding 5% between phases. Check whether the
power and capacity is appropriate for processing the load.
• Check the power phase order.
• Check / inspect the voltage monitoring meter in the power panel. The meter should not display any error codes.
• Use the HMI device to check the water outlet temperature and water output temperature setting.
• Set the start menu on the HMI device. Water circulation flow must be within the permitted range to control the temperature appropriately.
Checks During Initial Operation
After the test run, operate the chiller to verify the product is functioning properly. If there are any issues, immediately stop operation, and
follow the “Troubleshooting” process.
• Check the rotation of the condenser fan motor.
• Verify if the water outlet temperature matching the set temperature.
• Through the HMI device, check if all of the sensors display the appropriate values. Temperature sensor detects the compressor discharge
temperature, compressor suction temperature, condenser outlet temperature and cold water inlet/outlet temperature.
• Verify if the operating current, operation sound, and vibration matches the product specifications.
Stop Operation
• Follow the procedure below when stopping chiller operation.
• On the HMI, press the stop button
• Measure how long it takes for the chiller to actually stop.
• Stop the water pump.
Load Operation and Operation Adjustment
After start and stop, check the functions by operating the chiller, and adjusting if necessary. Adjust the water outlet temperature setting to
adjust the load.
TEST RUN
