Carrier AquaForce 30XV140 Controls, Start-up, Operation, Service And Troubleshooting Instructions

Also see for AquaForce 30XV140: Controls, start-up, operation, service and troubleshooting instructions

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23are listed in Table 20. These values depend on the EvaporatorFluid Type and the Brine Freeze Setpoint (see Chilled WaterFluid Type Selection on page 25).Table 20 — Evaporator Fluid Set Point Limits*The minimum set point for brine applications is related to the brinefreeze set point. The set point is limited to be no less than the brinefreeze set point + 4° F (2.2° C).CURRENT OPERATING SET POINT — Depending onthe current operation type, the active set point can be se-lected manually in the Main Menu, with the dry user con-tacts, with network commands (CCN or BACnet), or auto-matically with the set point time schedule (OccupancySchedule 2).Set points can be selected manually through the maininterface when the unit is in Local operating type, throughcontacts when the unit is in Remote operating type, orthrough the RS485 bus when unit is in CCN mode.Set points can also be selected automatically through aset point time schedule: when the period is occupied Cool-ing Setpoint 1 will be activated, and when the period isUnoccupied Cooling Setpoint 2 will be active. When in lo-cal operating type, time schedule is available if the Set-point Select Variable is set to AUTO (see below). In re-mote operating type, the AUTO mode will be available un-less the dual set point control through contacts has alreadybeen selected. In CCN mode, the set point selection al-ways depends on the time schedule. The set point can beforced through the SP_OCC CCN point (0 = Occupied =Cooling Setpoint 1, 1 = Unoccupied = Cooling Setpoint 2).Set point selection offers three different control options(Main Menu  General Parameters  Setpoint Select): Auto,Setpoint 1, and Setpoint 2.• 0 = Auto: The active cooling set point will be determinedby the configured Occupancy Schedules. See the Defin-ing Occupancy Schedule section for details on setting theschedules. Depending on the Ice Storage configurationand ice contact state, the active set point may alternatelybe set to the Cooling Ice Setpoint.• 1 = Setpoint 1: The active cooling set point will be Cool-ing Setpoint 1 defined in the set point table.• 2 = Setpoint 2: The active cooling set point will be Cool-ing Setpoint 2 defined in the set point table. Dependingon the Ice Storage configuration and ice contact state, theactive set point may alternately be set to the Cooling IceSetpoint.SETPOINT OCCUPANCY — Setpoint Occupancy is the de-fault configuration for the Setpoint Select variable. When Set-point Select (Main Menu  General Parameters  SetpointSelect) is configured to 0 (Auto), the unit’s active set point isbased on the programmed occupancy schedules. Under TimeSchedule 1 (OCCPC01S), the unit controls to Cooling SetPoint 1 (csp1) during the occupied periods. If the Time Sched-ule 2 (OCCPC02S) is in use, the unit’s active set point is basedon Cooling Set Point 1 (csp1) (Main Menu  Setpoint Table Cooling Setpoint 1) during the occupied period and CoolingSet Point 2 (csp2) (Main Menu  Setpoint Table  CoolingSetpoint 2) during the unoccupied period. The two schedulesare used together to determine periods when the chiller will becontrolling to Setpoint 1, Setpoint 2, or Off.See Table 21 for details on how the active cooling set point isdetermined based on unit operating type and parameter settings.DEFINING OCCUPANCY SCHEDULE — Two internalTime Schedules are available and must be field programmed.Occupancy Schedule 1 (OCCPC01S) is used for single setpoint On/Off control. Occupancy Schedule 2 (OCCPC02S) isused in combination with OCCPC01S for dual set point On/Offand Occupied/Unoccupied set point control. To access theSchedule screens, go to Main Menu  Configuration Menu Schedule Menu.If the chiller is to be controlled to a single set point, useSchedule 1 (OCCPC01S). This type of schedule will start andstop the machine only. During the unoccupied times, the chillerwill be off. The unit start/stop schedule OCCPC01S has a de-fault setting of always occupied. If the chiller is to be controlledto 2 set points, occupied and unoccupied, also use Schedule 2(OCCPC02S). Cooling Setpoint 1 will be active during occu-pied periods, and Cooling Setpoint 2 will be active during un-occupied periods.Table 21 — Active Cooling Set Point Parameters* Ice Storage Configuration and Ice Done Contact apply only to unitswith energy management module (EMM).Set PointLimitsEVAPORATOR FLUID TYPE (flui_typ)1 = Water 2 = Medium Brine 3 = Low BrineMinimum* 38 F (3.3 C) N/A N/AMaximum 60 F (15.5 C) N/A N/AOPERATINGTYPEPARAMETER STATUSACTIVE SETPOINTSetpointSelectionIce StorageConfiguration*Ice DoneContact*SetpointSwitch Schedule 2 StatusLocalsp-1 Default Any Any Default Cooling Setpoint 1sp-2 No Any Any Default Cooling Setpoint 2sp-2 Yes Closed Any N/A Cooling Setpoint 2sp-2 Yes Open Any N/A Cooling Ice Setpointautomatic Default Any Any Occupied Cooling Setpoint 1automatic No Any Any Unoccupied Cooling Setpoint 2automatic Yes Closed Any Unoccupied Cooling Setpoint 2automatic Yes Open Any Unoccupied Cooling Ice SetpointRemoteDefault Default Any Open Default Cooling Setpoint 1Default No Any Closed Default Cooling Setpoint 2N/A Yes Closed Closed N/A Cooling Setpoint 2Default Yes Open Closed Default Cooling Ice SetpointNetwork Default Default Any Any Occupied Cooling Setpoint 1Default Default Any Any Unoccupied Cooling Setpoint 2