TESTING THE INSTALLATION
NOTE: Make sure the chiller tank is full of process fluid before you begin operating.
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| WARNING: Only qualified personnel | ||||
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| should perform this procedure. |
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| Parts of this test require opening the unit while it is | ||||
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| energized. Only qualified personnel who have been | ||||
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| trained in the use of electrical testing devices and | ||||
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| in avoiding the safety hazards involved in safely | ||||
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| troubleshooting this type of equipment should per- | ||||
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| form this test procedure. |
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| Turn on the condenser water supply (MPW | |||||
| 1 | ||||||||
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| units) and check for leaks. If any leaks appear, stop | |||||
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| the test and fix the problem before continuing. The water | |||||
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| pressure must be at least must be at least 25 PSI at the | |||||
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| condenser inlet. |
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| Apply power to the unit. |
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| 2 |
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| ◆ Indicator lights on the control panel blink green, then | |||||
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| red, to test operation of the LEDs. |
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| ◆ Setpoint and actual windows will display |
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| for | ||
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| three seconds, followed by the software version. The | ||||
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| windows then display the factory default setpoint of | ||||
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| 50° F (10° C) and the actual temperature. |
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| 3 |
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| Check the rotation of the pump. Remove the | |||||
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| access panel and verify that the pump rotation matches the | |||||
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| direction indicated on the rotation stamp on the pump. | |||||
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| NOTE: If the rotation is incorrect, stop the test and |
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| disconnect power to the unit. Open the electrical |
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| enclosure and switch any two of the three power |
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| source wires on the terminal block. Return to Step 2 |
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| and check rotation again. |
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| 4 |
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| Replace the access panel. |
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| Press the RUN key to start the unit. |
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| 5 |
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If everything is working correctly: ◆ The RUN/STOP light turns green.
◆ The pump begins operating. The compressor turns on after 3 seconds, if the actual temperature is above the setpoint.
◆ Normal operation begins. The unloader valves turn on, if the actual temperature is below setpoint. The com- pressor remains active until the actual temperature is 6° F below the setpoint.
The test is over. Proceed to initial setup if the unit operated normally; refer to the TROUBLESHOOTING section if it did not.
INSTALLATION | microKool Portable Chillers | UGH004/0999 | |
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