Carrier AQUAFORCE 30XA080-500 Controls, Start-up, Operation, Service And Troubleshooting Instructions

Also see for AQUAFORCE 30XA080: Installation instructions Controls, start-up, operation, service and troubleshooting instructions Installation instructions Product data

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Carrier AQUAFORCE 30XA080-500 Controls, Start-up, Operation, Service And Troubleshooting Instructions Manual pdf 30 page image

30BRINE OR GLYCOL OPERATION — Configure the unitfor Cooler Fluid Type (Cooler Fluid Type, FLUD) to brine forbrine or glycol chilled water loops. This option will allow for aset point temperature range of 14 to 60 F (–10.0 to 15.5 C).Before configuring this selection, confirm that a suitable anti-freeze has been added and is at a sufficient concentration toprotect the loop. Additionally, the Brine Freeze Set Point(Brine Freeze Setpoint, LOSP) must be set for proper freezeprotection operation. Set the Brine Freeze Set Point to the burstprotection provided by the glycol concentration. This valuewill be Freeze Point for the fluid.To configure this option with the Touch Pilot display:To configure this option with the Navigator display:Cooler Pump Control — It is required for floodedcooler units that cooler pump control be utilized on all chillersunless the chilled water pump runs continuously or the chilledwater system contains a suitable antifreeze solution. The 30XAunits can be configured for single external pump control asstandard. Control of dual external pumps requires installationof the external pump control accessory package (Part No.00EFN900003200A).Cooler Pumps Sequence (Cooler Pumps Sequence,PUMP) is the variable that must be confirmed in the field.Proper configuration of the cooler pump control is required toprovide reliable chiller operation. Pump control can be accom-plished for both on-board and external pumps. For externalpump control, control connections to the pump contactor and afeedback circuit from the contactor must be supplied. TheCooler Pumps Sequence configuration can be set to 5 differentcontrol settings: No Pump Control, Single Pump Control, DualPump Control, Pump 1 Manual, and Pump 2 Manual.When the Cooler Pumps Sequence is configured, the coolerpump output will be energized when the chiller enters an “ON”mode. The cooler pump output is also energized when certainalarms are generated. The cooler pump output should be usedas an override to the external pump control if cooler pump con-trol is not utilized. The cooler pump output is energized if aP.01 Water Exchanger Freeze Protection alarm is generated,which provides additional freeze protection if the system is notprotected with a suitable antifreeze solution.A chilled water pump interlock contact PMP-I is connectedacross TB5 terminals 1-2, as an alternative to the standardjumper. This interlock is an optional field-installed devicewhich would provide extra protection in the event of the flowswitch failing closed. It may be used regardless of whether ornot pump control is enabled. However, this interlock shouldNOT be confused with the pump contactor feedback auxiliarycontacts which MUST be wired to MBB channel 18 at connec-tor J5C if the pump control feature is enabled (with or withoutthe optional on-board hydronic package).NO PUMP CONTROL — The factory default setting forCooler Pumps Sequence (Cooler Pumps Sequence, PUMP)is 0 (No Pump), for units without the factory-installed hydronicpackage.When Cooler Pumps Sequence is set to 0 (No Pump), clo-sure of both the chilled water flow switch (CWFS) and thechilled water pump interlock contact (connected across TB-5terminals 1 and 2) are required for the unit to start mechanicalcooling.To configure this option with the Touch Pilot™ display:To configure this option with the Navigator™ display:SINGLE PUMP CONTROL — For units with the singlepump hydronic package, the factory default setting for CoolerPumps Sequence (Cooler Pumps Sequence, PUMP) is 1(1 Pump Only). This control algorithm may be used to controlan external pump, as long as the same controls are applied asnoted below.When the Cooler Pumps Sequence configuration is set to 1Pump Only, closure of both the chilled water flow switch(CWFS) and the chilled water pump interlock contact (con-nected across TB-5 terminals 1 and 2) are required for the unitto start mechanical cooling. Additionally, the normally openauxiliary contacts for Pump 1 contactor must be connected tothe violet and pink wires located in the harness from the MBB-J5C-CH18 connector. The wires in the harness are marked“PMP1-13” and “PMP1-14”. See the field wiring diagram inthe 30XA Installation Instructions.Three additional parameters are configurable for pump con-trol with single pump control. Periodic pump start and checkflow if pump is off parameters can customize the pump opera-tion for the application. Another parameter, to stop the pump instandby mode is not supported.The control system has the ability to periodically start thepumps to maintain the bearing lubrication and seal integrity. IfPeriodic Pump Start (Pump Sticking Protection, PM.PS) isset to YES and the unit is off at 2:00 PM, the pump will bestarted once each day for 2 seconds. The default for this optionis NO.Another configuration to check the status of the chilledwater flow switch can be selected. When configured, if FlowChecked if Pump Off (Flow Checked if C Pump Off, P.LOC)is set to YES, the control will monitor the chilled water flowswitch status and will alarm if the pump is commanded off andthe chilled water flow switch is closed. This can provide theuser with information of a faulty cooler pump contactor or afailed chilled water flow switch. This parameter should be setto NO for series flow machines. The factory default for thisitem is YES.To configure this option with the Touch Pilot display:DISPLAYNAME PATH LINENO. VALUECooler FluidTypeMain MenuServiceSERVICE1 1 2 = BrineBrine FreezeSetpointMain MenuServiceSERVICE1 3 Dependent onfluid concentrationITEM ITEM EXPANSION PATH VALUEFLUD Cooler Fluid Type ConfigurationSERV BrineLOSP Brine FreezeSetpoint ConfigurationSERV Dependent onfluid concentrationDISPLAY NAME PATH LINENO. VALUECooler PumpsSequenceMainMenuConfigUSER 8 0 (No PumpControl)ITEM ITEM EXPANSION PATH VALUEPUMP Cooler PumpsSequence ConfigurationOPTN No PumpDISPLAY NAME PATH LINENO. VALUECooler PumpsSequence MainMenuConfigUSER 8 1 (SinglePump Control)Pump StickingProtectionMainMenuConfigUSER 15 Default = NoNo = DisabledYes = EnabledFlow Checkedif C Pump OffMainMenuConfigUSER 17Default = YesNo = DisabledYes = Enabled