Conair MPW, MPA Stopping the Chiller, Using Pumpdown Feature, To shut down the unit Press Stop

Page 39

WARNING: Electrical shock hazard

Before attempting maintenance of any kind

on the chiller, you must stop the unit; disconnect and lockout the main power supply.

You must shut down the chiller whenever you:

●Change water or process hookups.

●Shut down the process machine.

●Run the unit’s diagnostic tests.

●Perform routine or preventative maintenance.

●See an alarm condition that requires troubleshooting.

●Relocate, ship or store the unit.

To shut down the unit:

1 Press Stop .

2 Disconnect the power supply if you have shut down to service or repair the chiller.

STOPPING THE CHILLER

If you have shut down the chiller for relocation or storage, drain all fluid from the unit; disconnect the power supply; and disconnect all process and water connections. In ship- ment or storage, the chiller can withstand an environment between -40° F (-40° C) and 150° F (65° C) with 95% rela- tive humidity non-condensing.

The microKool must be running to use this feature.

1	Press the		button to turn on Pumpdown.

	◆ The green		Pumpdown light will flash, indicating the
	feature is ready to start when needed.
	◆ When Pumpdown is needed, the compressor runs

occasionally to pump refrigerant to the condenser. When Pumpdown is running, the green light remains on but does not flash.

USING THE

PUMPDOWN

FEATURE

(PC-2 CONTROL ONLY)

2

Press the button again to turn off Pumpdown.

UGH004/0999

microKool Portable Chillers

OPERATION 4-7

Image 39

Contents Page Date Manual Number UGH004/0999 Serial numbers Model numbers Introduction Table of ContentsTroubleshooting Introduction Purpose User Guide HOW Guide is OrganizedYour Responsibility AS a User Read this SO no ONE Gets Hurt Page Description What is the Microkool CHILLER?Typical Applications HOW IT Works Water Cooled HOW IT Works AIR Cooled High Efficiency Compressors FeaturesPsi Pressure Specifications MPW Water CooledMPA-5 Specifications MPA AIR CooledFreeze Protection Requirements Freezing Points of Aqueous Ethylene Glycol SolutionsInstallation Unpacking BoxesMicroKool Portable Chillers come fully assembled Preparing for Installation Make sure the installation area providesInstall plumbing for process and cooling lines Coat the pipe threads with thread sealant Connecting Process Water Supply LinesInstall pipe to the rear of the chiller Remove the shipping pipe plug from the femaleOpen the unit’s electrical enclosure Connecting Main Power SupplyUnits and check for leaks. If any leaks appear, stop Testing the InstallationApply power to the unit Turn on the condenser water supply MPWEntering Setpoint Deviation Parameters Dip switch Configuration Initial SetupOpen the electrical enclosure Change Dip Switch 1 to Changing Temperature UnitsSetpoint adjustment buttons Disconnect and lock out main power to the unitOpen the electrical enclosure Set dip switch 3 to on Select a new passcode usingPress the RUN button to save the passcode Open the electricalFollow Steps 1 through 5 Select a new control point using the Display button Selecting Temperature Control PointPress the RUN button to save the control point Set dip switch 5 toInsert the two power leads from the device Installing Auto Start FeatureSet dip switch 4 to the on position When Auto Start is enabledTo disable Auto Start Enter the node address Apply power to the chiller Enter the passcode, if necessaryActivating SPI Communication Connect the host machine to the chillerOperation Setpoint display PC-1 Control FeaturesPumpdown On/Off PC-2 Control FeaturesTo detach the PC-2 control panel Positioning Control PanelTo raise and swivel the control panel To lower the control panelPress Setpoint to select the parameter you want to change Entering a PasscodeEnter the passcode Starting the ChillerPress Button to turn on Pumpdown Using Pumpdown FeatureStopping the Chiller To shut down the unit Press StopPerforming AN Auto Tune Insufficient setpoint/process deviation Page Maintenance Preventative Maintenance Schedule Quarterly every 3 months Inspect power cords, wires and electrical connectionsCleaning Condensers Cleaning EvaporatorsRefilling the Tank Locate the fill port at Back of the chillerTo fill the reservoir If the charge is low, recharge the system Checking Refrigerant ChargeThen open the electrical enclosure Set dip switches 3Performing System Tests Press To shut down the chillerKEY/DISPLAY Test Select the Input Test menu Input TestConnect all inputs to the system Press any key to display the first test menusOutput Test Connect all outputs to the systemSelect the Output Test menu Select the OM Enable/Disable menu Disabling or Enabling Output MonitorsSave changes and exit the output menu Release the Setpoint key Calibrating Temperature SensorsPress Select Exit Calibration ModePress the up key to begin calibrating Wait until the control displays don or badLogging Operating Hours Index through test menus to the operating logExit the Operating Hours Log Troubleshooting Messages shown on the control panel. These Before BeginningFEW Words Verify that you have manuals for other equipCause of a Problem HOW to IdentifyGreater than the pump’s Supplied to the pumpMotor? Is the required water flowLoose? Is the thermocoupleDisconnected? Ply wire leads becomeLevel Switch fuse Has the indicated device Has one of the main supCompressor Air-cooled units Shut Down AlarmsRefrigerant pressure is either too low or too high All modelsFlow through he evapora Is the freezestat settingInstalled correctly? Freeze Stat Input is open Is there sufficient fluidCable? Is something wrong withSystem Alarms Chiller Will not Power UP Replace the fuse. The fuses are located on the mother Checking Replacing FusesIf fuses continue to fail On the front panel counterclockwise to openResetting Overloads Check the overloadLocate the pump overload module attached Replacing the Motherboard Reverse this procedure to install the new con Replacing Compressor ContactorRemove and discard the old contactor Checking Unloader Valve Replacing the Freezestat From outside the United States, call WE’RE Here to HelpAppendix A-2 SPI Command Pairs SPI Commands Supported by Conair MicrokoolStatus, Process SPI Status WordsStatus, Machine Appendix B-4 PARTS/DIAGRAMS PD-2 PD-3 PD-4 PD-5