Carrier AQUAFORCE 30XW150-400 Operation & Service Manual

Contents

23commands, except the Emergency Stop Command will beignored. The Run Status variable will indicate the current sta-tus of the machine (OFF, RUNNING, DELAY, or READY),depending on the position of the Remote/Off/Enable Switchclosure. The Chiller Occupied? variable will change to YES.The Control Type variable will change to Remote. The Oper-ating Type variable will change to Remote.Master Mode — To activate Dual Chiller Control, each ma-chine must be individually configured for Dual Chiller Control.To operate the machines in Dual Chiller Mode, one machinemust be designated as the master unit and one machine as theslave unit. On the master unit, press the Start/Stop button on theTouch Pilot display. The Equipment Start screen will be dis-played. Select Master Mode. Failure to start the Master unit inthis manner will cause both machines to operate in local mode.The Master Unit Control can be done locally, remotely orthrough CCN commands per the master/slave configuration(Master Control Type). The control will ignore the position ofEnable/Off/Remote Contact switch if the Master ControlType is configured for Local Control or CCN Control. TheRun Status variable, Chiller Occupied? variable, and Con-trol Type variable will change based on the Master ControlType configured above and the Machine On/Off Control de-fined above. The Operating Type variable will change toMaster.To Turn Machine Off — To turn the machine off, press theStart/Stop button on the Touch Pilot display. See Fig. 17. Themachine will shut down. While the unit is in Local Off, it willremain shut down and ignore all CCN commands as well asthe position of Enable/Off/Remote Contact switch. The RunStatus variable, indicating the current status of the machine,will change to OFF. The Chiller Occupied? variable willchange to NO. The Control Type variable will indicateLocal. The Operating Type variable will change to L-OFF(Local Off).NAVIGATOR™ DISPLAY MACHINE CONTROL — Ma-chine On/Off control with the Navigator display is determinedby the configuration of the Operating Type Control (OPER).Options to control the machine locally via a switch, from a lo-cal Time Schedule, or via a Carrier Comfort Network® com-mand are offered. See Table 17.The schedules consist of 8 user-configurable occupied timeperiods. The control supports time schedules for local control,remote control, and ice building. These time periods can beflagged to be in effect or not in effect on each day of the week.The day begins at 00.00 and ends at 24.00. The machine is inunoccupied mode unless a scheduled time period is in effect. Ifan occupied period is to extend past midnight, the occupiedperiod must end at 24:00 hours (midnight) and a new occupiedperiod must be programmed to begin at 00:00 hours.In the following example, a early morning pulldown timeperiod is scheduled for Monday morning from 12:00 AM to3:00 AM. The occupied period starts at 7:00 AM, Mondaythrough Saturday. The occupied time ends at 6:00 PM on Mon-day and Tuesday, 9:30 PM on Wednesday, 5:00 PM on Thurs-day and Friday, and 12:00 PM on Saturday.NOTE: This schedule was designed to illustrate the program-ming of the schedule function and is not intended as a recom-mended schedule for chiller operation.Switch Control — In the Switch Control operating type, theEnable/Off/Remote Contact switch controls the machine local-ly. All models are factory configured with Operating TypeControl (OPER) set to SWITCH CTRL (Switch Control).With SWITCH CTRL, switching the Enable/Off/RemoteContact switch to the Enable or Remote Contact position (ex-ternal contacts closed) will put the chiller in an occupied state.The Unit Run Status (STAT) will indicate the current status ofthe machine and will change from OFF to RUNNING orDELAY. The unit Occupied Status (OCC) will change fromNO to YES. The Status Unit Control Type (CTRL) will changefrom LOCAL OFF when the switch is Off to LOCAL ONwhen in the Enable position or in the Remote Contact positionwith external contacts closed.Table 17 — Navigator Start/Stop ControlFig. 17 — Equipment Stop ScreenITEM ITEM EXPANSION PATH VALUEOPER Operating ControlTypeOperatingModes SLCT OPERSWITCHCTRL CONTROLMETHOD(OPER)ACTIVEOPERATINGTYPEREMOTE/OFF/ENABLESWITCHREMOTE ON/OFFSWITCH TIME SCHEDULE 1CCN CHILLERSTART/STOP(CHIL_S_S)EMERGENCYSTOP(EMSTOP)ALARMREMOTELOCKOUTSWITCHUNITSTATUSAll Local OffOff — — — — — — OffRemote Open — — — — — Off— — — — Enable — — Off— — — — — Yes — Off— — — — — — Closed OffSwitchControl Local On Enable — — — Disable — — OnRemote Closed — — Disable — — OnTimeScheduleLocalScheduleEnable — Occupied — Disable — — OnRemote Closed Occupied — Disable — — On— — Unoccupied — Disable — — OffCCNControl CCNRemote Closed — Enable Disable — — OnRemote Closed — Disable Disable — — OffEnable — — Enable Disable — — OnEnable — — Disable Disable — — Off