Carrier AquaForce B Series 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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Carrier AquaForce B Series Controls, Start-up, Operation, Service And Troubleshooting Instructions Manual pdf 27 page image

27Table 20 — Unit StatesTable 21 summarizes the unit control method and stop or gostatus with regard to the following parameters set in the CarrierController module:• Machine Control Method: Machine Control Method as se-lected on the unit Start/Stop screen.• CHIL_S_S: Current CCN chiller start/stop force com-mand (enable/disable). Main Menu General Parame-ters Net:Cmd Start/Stop.• ONOFF_SW: Start-stop contact status when unit is under re-mote operating type. Main Menu Inputs Status Re-mote On/Off Switch.• CHIL_OCC: Chiller occupied state. If the occupancyoverride input switch is closed, the chiller remains occu-pied regardless of the set point scheduled selection. MainMenu General Parameters Net:Cmd Occupied.• MS_CTRL: Master control type. This parameter status willdetermine if the master unit is going to be controlled locally,remotely, or through CCN. Main Menu MaintenanceMenu Master Slave Control (0=disabled, 1=master,2=slave).• EMSTOP: CCN emergency stop command (enable/disable).Main Menu General Parameters Emergency Stop.• Alarm shutdown: Unit is totally stopped due to alarm.The Machine Control Method and Parameter Status combina-tions listed in Table 21 will determine the actual unit runningstate.NOTE: When changing from one Machine Control Method(Local On, Local Schedule, Network, Remote, or Master) toanother, the unit will observe a transition through the Off statebefore being allowed to start again. At this time the on-to-offdelay is always applied.Chilled Water Set Point ConfigurationThe chilled water set point and fluid type configuration will de-termine the chiller operating conditions.FLUID SET POINT CONTROL LOCATIONThe factory default for the chilled water fluid set point is tocontrol to the leaving water temperature. An option to config-ure the machine for entering water control is available. To con-figure this option go to Main Menu Configuration Menu Service Parameters. The default for Entering Fluid Con-trol is Off (leaving fluid control is the default condition). Toenable Entering Water Control, change Entering Fluid Con-trol to On. Entering Water Control is recommended for con-stant flow applications only.COOLING SET POINT SELECTIONThe Control Point (shown in the lower right corner of the HomeScreen, or Main Menu General Parameters ControlPoint) represents the water temperature that the unit must pro-duce. The unit will vary the capacity depending on the load condi-tions in order to satisfy the set point. The Control Point(CTRL_PNT) is calculated based on the Active Setpoint (MainMenu General Parameters) [Main Menu and General Param-eters in bold italics]. and the reset calculation, where Control Point= Current Setpoint + Temperature Reset. (See “Temperature Re-set” on page 38.) Control Point can be written to by the BuildingManagement System, instead of the set point calculation only ifNetwork is selected as the Machine Control Method for the unit.See Main Menu General Parameters Local=0 Net.-1 Re-mote=2 to verify operating type.Table 21 — Start/Stop ControlLEGENDSTATE DESCRIPTIONOff Unit is commanded to be offStopping Unit is currently stopping (after a manual, emergency, orshutdown request). Next state will be Off.Delay Unit is in delay at start-up (waiting for the end of the On/Offdelay to be reached). Next state will be Running.Running Unit compressor capacity is more that 0% (unit has startedrunning)Ready Unit compressor capacity is 0%. Unit is ready to start.Override The compressor cannot start because of an override (SST,SCT, etc.)Tripout Unit is Off due to an alarmTest Unit is in Quick TestMACHINE CONTROL METHOD PARAMETER STATUS OPERATINGTYPE UNITSTATUSCHIL_S_S ONOFF_SW MS-CTRL CHIL_OCC EMSTOP AlarmShutdownLocal Off — — — — — — Local OffLocal On — — — — Disable No Local OnLocal Schedule — — — Yes Disable No Local On— — — No — — Local OffRemote — Open — — — — Remote Off— — — No — — Remote OffClosed Yes — — Remote OnCCN Disable — — — — — CCN Off— — — No — — CCN OffEnable — — Yes Disabled No CCN OnMaster — — Local No — — Local Off— Open Remote — — — Remote Off— — Remote No — — Remote OffDisable — CCN — — — CCN Off— — CCN No — — CCN Off— — Local Yes Disable No Local On— Closed Remote Yes Disable No Remote OnEnable CCN Yes Disable No CCN On— — — — — Enable — — Off— Yes — OffCHIL_OCC — Chiller Occupied State MA St — Master/Slave Operating TypeCHIL_S_S — CCN Chiller Start/Stop Command MS-CTRL — Master/Slave ControlEMSTOP — Emergency Stop ONOFF_SW — Remote On/Off Switch