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

Also see for AQUASNAP 30RBA315: Installation instructions

448. Crankcase heaters must be firmly seated under compres-sor, and must be energized for 24 hours prior to start-up.9. Verify power supply phase sequence. Fan motors are 3phase. Check rotation of non-VFD controlled fans by us-ing the quick test. Fan rotation is counterclockwise asviewed from top of unit. If fan is not turning counter-clockwise, reverse 2 of the power wires at the main termi-nal block.10. Check compressor mounting sled. Shipping bolts must beremoved.START-UPActual Start-Up — Actual start-up should be done onlyunder supervision of a qualified refrigeration technician.1. Be sure all shut off valves are open. Units are shippedfrom factory with suction valves (if equipped) open.Discharge and liquid line shut off valves are closed.2. Using the scrolling marquee display, set leaving-fluid setpoint (SetpointsCOOLCSP.1). No cooling range ad-justment is necessary.3. If optional control functions or accessories are beingused, the unit must be properly configured. Refer toConfiguration Options section for details.4. Start chilled fluid pump, if unit is not configured forpump control, (ConfigurationOPTNPUMP= 0).5. Complete the Start-Up Checklist to verify all componentsare operating properly.6. Turn ENABLE/OFF/REMOTE CONTACT switch toENABLE position.7. Allow unit to operate and confirm that everything isfunctioning properly. Check to see that leaving fluidtemperature agrees with leaving set point Control Point(Run StatusVIEWCTPT).Operating LimitationsTEMPERATURES — Unit operating temperature limits arelisted in Table 33.Table 33 — Temperature Limits for Standard UnitsLEGEND*For sustained operation, EWT should not exceed 85 F (29.4 C).†Unit requires brine modification for operation below thistemperature.Low Ambient Operation — If unit operating temperatures be-low 32 F (0° C) are expected, refer to separate unit installationinstructions for low ambient temperature operation using ac-cessory low ambient temperature head pressure control, if notequipped. Contact a Carrier representative for details.NOTE: Wind baffles and brackets must be field-fabricated andinstalled for all units using accessory low ambient headpressure control to ensure proper cooling cycle operation atlow-ambient temperatures. See the 30RB InstallationInstructions or the low ambient temperature head pressure con-trol accessory installation instructions for more information.VOLTAGEMain Power Supply — Minimum and maximum acceptablesupply voltages are listed in the Installation Instructions.Unbalanced 3-Phase Supply Voltage — Never operate amotor where a phase imbalance between phases is greater than2%.To determine percent voltage imbalance:The maximum voltage deviation is the largest differencebetween a voltage measurement across 2 legs and the averageacross all 3 legs.Example: Supply voltage is 240-3-60.AB = 243vBC = 236vAC = 238v1. Determine average voltage:2. Determine maximum deviation from average voltage:(AB) 243 – 239 = 4 v(BC) 239 – 236 = 3 v(AC) 239 – 238 = 1 vMaximum deviation is 4 v.3. Determine percent voltage imbalance:= 1.7%This voltage imbalance is satisfactory as it is below themaximum allowable of 2%.MINIMUM FLUID LOOP VOLUME — To obtain propertemperature control, loop fluid volume must be at least 3 gal-lons per ton (3.25 L per kW) of chiller nominal capacity for airconditioning and at least 6 gallons per ton (6.5 L per kW) forprocess applications or systems that must operate at low ambi-ent temperatures (below 32 F [0° C]). Refer to application in-formation in Product Data literature for details.CAUTIONDo not manually operate contactors. Serious damage to themachine may result.TEMPERATURE F CMaximum Ambient Temperature 125 52Minimum Ambient Temperature 32 0Maximum Cooler EWT* 95 35Maximum Cooler LWT 60 15Minimum Cooler LWT† 40 4.4EWT — Entering Fluid (Water) TemperatureLWT — Leaving Fluid (Water) TemperatureCAUTIONBrine duty application (below 40 F [4.4 C] leavingchilled water temperature) for chiller normally requiresfactory modification. Contact a Carrier representativefor details regarding specific applications. Operationbelow 40 F (4.4 C) leaving chilled water temperaturewithout modification can result in compressor failure.% Voltage Imbalance = 100 xmax voltage deviation fromavg voltageaverage voltageAverage voltage = 243+236+2383= 7173= 239% Voltage Imbalance = 100 x 4239IMPORTANT: If the supply voltage phase imbalanceis more than 2%, contact the local electric utility com-pany immediately. Do not operate unit until imbalancecondition is corrected.