Checking Refrigerant Charge | Conair MPA, MPW specs

CHECKING

REFRIGERANT

CHARGE

All chillers are fully charged with refrigerant at the factory. Your chiller mode’s nameplate identifies the type and amount of total refrigerant charge required.

1 While the unit is running, check the refriger- ant charge through the sight glass located between the evaporator and the condenser. Use a flash- light to look at the liquid-line sight glass.

◆Under full-load conditions, the sight glass should be clear.

◆Under low-load conditions, when the hot-gas bypass valves are operating, bubbles may be visible in the sight glass. This is normal.

2

If the charge is low, recharge the system.

Contact a certified refrigerant technician to recharge or replace refrigerant. This procedure should be performed only be a qualified technician.

5-6

MAINTENANCE

microKool Portable Chillers

UGH004/0999

Image 48

Conair MPA, MPW manual Checking Refrigerant Charge, If the charge is low, recharge the system

Contents

Page Date Manual Number UGH004/0999 Serial numbers Model numbers Table of Contents Introduction Troubleshooting 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 Features High Efficiency Compressors Specifications MPW Water Cooled Psi Pressure Specifications MPA AIR Cooled MPA-5 Freezing Points of Aqueous Ethylene Glycol Solutions Freeze Protection Requirements Installation Unpacking BoxesMicroKool Portable Chillers come fully assembled Preparing for Installation Make sure the installation area providesInstall plumbing for process and cooling lines Connecting Process Water Supply Lines Install pipe to the rear of the chillerRemove the shipping pipe plug from the female Coat the pipe threads with thread sealant Connecting Main Power Supply Open the unit’s electrical enclosure Testing the Installation Apply power to the unitTurn on the condenser water supply MPW Units and check for leaks. If any leaks appear, stop Entering Setpoint Deviation Parameters Initial Setup Dip switch Configuration Changing Temperature Units Open the electrical enclosure Change Dip Switch 1 to Disconnect and lock out main power to the unit Open the electrical enclosure Set dip switch 3 to onSelect a new passcode using Setpoint adjustment buttons Press the RUN button to save the passcode Open the electricalFollow Steps 1 through 5 Selecting Temperature Control Point Select a new control point using the Display button Set dip switch 5 to Press the RUN button to save the control point Installing Auto Start Feature Insert the two power leads from the device Set dip switch 4 to the on position When Auto Start is enabledTo disable Auto Start Apply power to the chiller Enter the passcode, if necessary Activating SPI CommunicationConnect the host machine to the chiller Enter the node address Operation PC-1 Control Features Setpoint display PC-2 Control Features Pumpdown On/Off Positioning Control Panel To raise and swivel the control panelTo lower the control panel To detach the PC-2 control panel Entering a Passcode Press Setpoint to select the parameter you want to change Starting the Chiller Enter the passcode Using Pumpdown Feature Stopping the ChillerTo shut down the unit Press Stop Press Button to turn on Pumpdown Performing AN Auto Tune Insufficient setpoint/process deviation Page Maintenance Preventative Maintenance Schedule Inspect power cords, wires and electrical connections Quarterly every 3 months Cleaning Evaporators Cleaning Condensers Refilling the Tank Locate the fill port at Back of the chillerTo fill the reservoir Checking Refrigerant Charge If the charge is low, recharge the system Set dip switches 3 Performing System TestsPress To shut down the chiller Then open the electrical enclosure KEY/DISPLAY Test Input Test Connect all inputs to the systemPress any key to display the first test menus Select the Input Test menu Output 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 Calibrating Temperature Sensors Release the Setpoint key Exit Calibration Mode Press the up key to begin calibratingWait until the control displays don or bad Press Select Logging Operating Hours Index through test menus to the operating logExit the Operating Hours Log Troubleshooting Before Beginning FEW WordsVerify that you have manuals for other equip Messages shown on the control panel. These HOW to Identify Cause of a Problem Supplied to the pump Motor?Is the required water flow Greater than the pump’s Is the thermocouple Loose? Ply wire leads become Level Switch fuse Has the indicated deviceHas one of the main sup Disconnected? Compressor Shut Down Alarms Refrigerant pressure is either too low or too highAll models Air-cooled units Is the freezestat setting Installed correctly?Freeze Stat Input is open Is there sufficient fluid Flow through he evapora Is something wrong with Cable? System Alarms Chiller Will not Power UP Checking Replacing Fuses If fuses continue to failOn the front panel counterclockwise to open Replace the fuse. The fuses are located on the mother Resetting 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 WE’RE Here to Help From outside the United States, call Appendix A-2 SPI Commands Supported by Conair Microkool SPI Command Pairs SPI Status Words Status, Process Status, Machine Appendix B-4 PARTS/DIAGRAMS PD-2 PD-3 PD-4 PD-5