Conair MPA Testing The Installation, WARNING Only qualified personnel, Apply power to the unit

TESTING THE INSTALLATION

NOTE: Make sure the chiller tank is full of process fluid before you begin operating.

		WARNING: Only qualified personnel
		should perform this procedure.
		Parts of this test require opening the unit while it is
		energized. Only qualified personnel who have been
		trained in the use of electrical testing devices and
		in avoiding the safety hazards involved in safely
		troubleshooting this type of equipment should per-
		form this test procedure.
	Turn on the condenser water supply (MPW
1
	units) and check for leaks. If any leaks appear, stop
	the test and fix the problem before continuing. The water
	pressure must be at least must be at least 25 PSI at the
	condenser inlet.
	Apply power to the unit.
2
	◆ Indicator lights on the control panel blink green, then
		red, to test operation of the LEDs.
	◆ Setpoint and actual windows will display		for
		three seconds, followed by the software version. The
		windows then display the factory default setpoint of
		50° F (10° C) and the actual temperature.
3	Check the rotation of the pump. Remove the
	access panel and verify that the pump rotation matches the
	direction indicated on the rotation stamp on the pump.
	NOTE: If the rotation is incorrect, stop the test and
	disconnect power to the unit. Open the electrical
	enclosure and switch any two of the three power
	source wires on the terminal block. Return to Step 2
	and check rotation again.
4	Replace the access panel.
	Press the RUN key to start the unit.
5

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.

3-6 INSTALLATION microKool Portable Chillers UGH004/0999