Carrier 19XRV Start-up, Operation And Maintenance Instructions Manual

Also see for AquaEdge 19XRV series: Start-up, operation and maintenance instructions Start-up and service instructions Installation instructions Start-up, operation and maintenance instructions Start-up and service instructions

Contents

9STARTING EQUIPMENTAll 19XRV units are equipped with a VFD to operate thecentrifugal hermetic compressor motor. A power panel controlsthe oil pump, and various auxiliary equipment. The VFD andpower panel are the main field wiring interfaces for the install-ing contractor. The VFD is mounted directly on the chiller.Three separate circuit breakers are inside the VFD. Circuitbreaker CB1 is the VFD circuit breaker. The disconnect switchon the VFD front cover is connected to this breaker. Circuitbreaker CB1 supplies power to the VFD.Circuit breaker CB2 supplies 115-v power to the oil pumpcontrol panel, oil heater, and portions of the VFD controls.Unit-Mounted VFD — The 19XRV chiller is equippedwith a variable frequency drive motor controller mounted onthe condenser. See Fig. 5-7. This VFD is used with low voltagemotors between 380 and 460 vac. It reduces the starting currentinrush by controlling the voltage and frequency to the compres-sor motor. Once the motor has accelerated to minimum speed,the PIC III modulates the compressor speed and guide vaneposition to control chilled water temperature. The VFD isfurther explained in the Controls section and TroubleshootingGuide section, pages 14 and 82.Operational parameters and fault codes are displayed rela-tive to the drive. Refer to specific drive literature along withtroubleshooting sections. The display is also the interface forentering specific chiller operational parameters. These parame-ters have been preprogrammed at the factory. An adhesivebacked label on the inside of the drive has been provided forverification of the specific job parameters. See Initial Start-UpChecklist section for details.The main circuit breaker (CB1) on the front of the VFDdisconnects the main VFD current only. Power is still ener-gized for the other circuits. Two more circuit breakersinside the VFD must be turned off to disconnect power tothe oil pump, PIC III controls, and oil heater.Do not touch the power wiring or motor terminals whilevoltage is present, or serious injury will result.ISOLATIONVALVESIGHTGLASSFILTERISOLATIONVALVEFILTEREDUCTOROILPUMPTXV BULB PRESSURETRANSDUCERISOLATIONVALVESOILCOOLER OIL PUMPMOTOROILHEATERMOTORCOOLING LINELABYRINTHGAS LINEFWD MOTORBEARINGOIL SUPPLY TOFORWARD HIGHSPEED BEARINGSIGHTGLASSOIL SKIMMERLINEFLOWOILFILTERREAR MOTORBEARINGSTRAINERFig. 4 — Lubrication Systema19-1741