Carrier AQUASNAP 30RB060-390 Controls, Start-up, Operation, Service And Troubleshooting Instructions

Also see for AQUASNAP 30RBA315: Installation instructions

43Table 32 — Externally Powered Demand Limit ConfigurationNOTE: Bold values indicate sub-mode level.PRE-START-UPDo not attempt to start the chiller until the following checkshave been completed.System Check1. Check auxiliary components, such as the chilled fluidcirculating pump, air-handling equipment, or otherequipment to which the chiller supplies liquid are opera-tional. Consult manufacturer’s instructions. If the unit hasfield-installed accessories, be sure all are properlyinstalled and wired correctly. Refer to unit wiringdiagrams.2. Open compressor suction (if equipped) and dischargeshutoff valves.3. Open liquid line shut off valves.4. Fill the chiller fluid circuit with clean water (with recom-mended inhibitor added) or other non-corrosive fluid tobe cooled. Bleed all air out of high points of system. Anair vent is included with the cooler. If outdoor tempera-tures are expected to be below 32 F (0° C), sufficientinhibited propylene glycol or other suitable corrosioninhibited antifreeze should be added to the chiller watercircuit to prevent possible freeze-up.The chilled water loop must be cleaned before the unit isconnected. Units supplied with the accessory hydronicpackage include a run in screen. If the run-in screen is leftin the suction guide/strainer, it is recommended that theService Maintenance be set to alert the operator within24 hours of start-up to be sure that the run-in screen in thesuction guide/strainer is removed. To set the time for theparameter, go to Time ClockMCFGW.FIL. Valuesfor this item are counted as days. Refer to the hydronicpump package literature if unit is equipped with theoptional hydronic pump package.5. Check tightness of all electrical connections.6. Oil should be visible in the compressor sight glass. Anacceptable oil level in the compressor is from 3/4 to 7/8full sight glass. Adjust the oil level as required. No oilshould be removed unless the crankcase heater has beenenergized for at least 24 hours. See Oil Charge section forCarrier-approved oils.7. Electrical power source must agree with unit nameplate.MODE KEYPAD ENTRY DISPLAY ITEM EXPANSION COMMENTCONFIGURATION DISPUNITSERVOPTNRSET Reset Cool and Heat TmpCRSTHRSTDMDC Demand Limit Select0 None0 None Flashing to indicate Edit mode. May require Password2 4-20 mA Input Use up arrows to change value to 2.2 Accepts the change.DMDCDMMX mA for 100% Demand Limit00 Flashing to indicate Edit mode4.0 Use up arrows to change the value to 4.DMMXDMZE mA for 0% Demand Limit00 Flashing to indicate Edit mode20.0 Use up arrows to change value to 20.DMZEENTERENTERENTERENTERENTERESCAPEENTERENTERESCAPEENTERENTERESCAPEIMPORTANT: Complete the Start-Up Checklistfor 30RB Liquid Chillers at the end of this publication.The checklist assures proper start-up of a unit, andprovides a record of unit condition, applicationrequirements, system information, and operation atinitial start-up.