Carrier AquaEdge 19DV series Start-up, Operation And Maintenance Instructions Manual

Also see for AquaEdge 19DV series: Start-up, operation and maintenance instructions Installation, operation and maintenance instructions Installation instructions Controls operation and troubleshooting Operation and Troubleshooting

Carrier AquaEdge 19DV series Start-up, Operation And Maintenance Instructions Manual Manual pdf 33 page image

33Fig. 30 — Pressure Sensor Calibration MenuINITIAL START-UPPreparation — Before starting the chiller, verify:1. Power is on to the VFD, chiller control panel, waterpumps, and other equipment as required.2. Cooling tower water is at proper level and at-or-belowdesign entering temperature.3. Chiller is charged with refrigerant and all refrigerantvalves are in their proper operating positions.4. Carrier inhibitor is located and available to be addedthrough evaporator charging valve.5. Valves in the evaporator and condenser water circuits areopen and flow is as per design.NOTE: If the pumps are not automatic, ensure water iscirculating properly.6. Access the PUMPDOWN/LOCKOUT feature from theMaintenance Menu. Press the End Lockout button on thetouch screen and accept the “press OK to TerminateLockout?” prompt. The unit is reset to operating mode.The chiller is locked out at the factory in order to preventaccidental start-up.Check Motor Rotation1. Close the starter enclosure door.2. Apply 3-phase power to drive.3. The VFD checks for proper phase rotation as soon aspower is applied to the starter and the PIC5 controls pow-er up.4. An alarm message will appear on the HMI screen if thephase rotation is incorrect. If this occurs reverse any 2 ofthe 3 incoming power leads to the starter and reapplypower. The motor is now ready for a rotation check.5. Go to Main Menu, Quick Test and Enable Quick Test fol-lowing by enable Motor Rotation Check. This starts thefollowing sequence:a. Fully open the first IGV.b. Open evaporator control valve, condenser drainvalve, close condenser control valve, and evaporatorcontrol valve. Run refrigerant pump for 30 seconds.c. Start the motor and ramp to 5 Hz in 10 seconds.d. Once the motor speed reaches 5 Hz, stop motor.e. Stop refrigerant pump 1 minute after motor speedreaches 5 Hz, then reset all 4 refrigerant lubricationvalves to close.f. Three minutes after motor speed reaches 5 Hz,close first IGV.Status can be followed in Quick test as Check StateIDLE=0, PreLub=1, Rotat=2, PosLub=3, End=4.6. When the VFD is energized and the motor begins to turn,check for clockwise motor rotation through first stagesight glasses. See Fig. 31.Fig. 31 — Correct Motor RotationCheck Refrigerant Lube1. In Quick Test the refrigerant lube pressure can bechecked. Open Evaporator CV, then run the refrigerantpump. Pressure drop across the refrigerant pump mustexceed 8 psig (55 kPa). If pressure drop is negative,check the pump rotation. If pressure drop is below 8 psig(55 kPa), check for clogged filter drier or bearing supplyfilter.2. Press the Stop button and listen for any unusual soundsfrom the compressor as it coasts to a stop.To Prevent Accidental Start-Up — A chiller STOPoverride setting may be entered to prevent accidental start-upduring service or whenever necessary. From the Main Menu,access the General Parameters Menu and use the down arrowto reach Stop Override on the GENUNIT table. Change StopOverride to Yes; then execute the command by touching thelightning button. The message “ALM-276 Protective Limit -Stop Override” will appear in the Home Screen message area.To restart the chiller, access the same screen and change theStop Override option to No.Check Chiller Operating Condition — Check to besure that chiller temperatures, pressures, water flows, and re-frigerant levels indicate the system is functioning properly.Instruct the Customer Operator — Ensure the op-erator(s) understand all operating and maintenance procedures.Point out the various chiller parts and explain their function aspart of the complete system.CAUTIONDo not permit water or brine that is warmer than 150°F(65°C) to flow through the cooler or condenser. Refrigerantoverpressure may discharge through the relief device andresult in the loss of refrigerant charge (applicable only withstandard CLT rupture disk).IMPORTANT: Do not check motor rotation during coast-down. Rotation may have reversed during equalization ofvessel pressures.CORRECT MOTOR ROTATIONIS CLOCKWISE WHEN VIEWEDTHROUGH SUCTION PIPELEADING TO COMPRESSOR1ST STAGE SIGHT GLASS