Reset function for return CWR | American Standard CH530 instruction

Machine Protection

and Adaptive

Control

Figure 33. Reset function for return CWR

Figure 34. Reset function for return CWR

Note: This graph assumes Maximum Reset is set to 20 degrees.

86

CDHF-SVU01C-EN

Image 86

American Standard CH530 manual Reset function for return CWR

Contents

X39640670030CDHF-SVU01C-EN Read these carefully Contents About this manual General InformationLiterature change Unit Nameplate General Information = 560 3 stage 935 2 stage Y = 500 3 stage 835 2 stage Commonly Used Acronyms Control Optional Packages Overview General Duplex unit components front view General Duplex unit components 2 stage compressor Cooling Cycle Compressor 1 or 2 2 Stage Pressure enthalpy curve 3 stage compressor Pressure enthalpy curve 2 stage compressor TechView Chiller Service Tool DynaView Human Interface Software States Figure Power Up DiagramSoftware Operation Overview Diagram Timeline Text Figures CDHE/F/G sequence of operation auto to running Staging Second Compressor On Staging Second Compressor Off Satisfied Setpoint CDHF/G sequence of operation lead 1/lag Fixed Sequence Compressor 2 / Compressor CDHE/F/G sequence of operation lead 2 lag Sequencing Balanced Starts and Hours CDHF/G sequence of operation equalize starts and hours Simultaneous Compressor Start/ Stop CDHF/G sequence of operation combined start Restart Inhibit Free Starts Restart Inhibit Start to Start Time SettingRestart Inhibit Clear Restart Inhibit Surface Temperatures Oil and Refrigerant Pump Oil refrigerant pump circuit 1 or Base Loading Control Algorithm 20 100 percent RLA General Information Ice Machine Control Sequence of operation ice making running to ice making Hot Water control Unit Control Panel UCP Unit Control Panel UCPControl Panel Devices and Unit Mounted Devices Variable water flow through the evaporator User-defined language support Operator Interface DynaView main processor Operator Interface Chiller Stop Prevention/Inhibit Feature How It Works Top Level Mode Description System Reset Reference Main Screen Chiller Operating ModeCircuit Operating Mode Main Screen Data Fields Table Diagnostic Screen Back button provides navigation back to the chiller screen Operator Interface Report Menu Reports Report name System Condenser Report name System EvaporatorReport name Circuit Evaporator Report name Circuit Condenser Historic Diagnostics Log Report name System Ashrae Chiller Log Setting Tab screens provides a user Header Screen Feature Settings Chiller Display Settings System Mode OverridesCircuit Mode Overrides Purge Operator Interface Operator Interface Operator Interface Operator Interface Operator Interface IPC3 Definitions Bus Management Interprocessor CommunicationInter Processor Communications IPC3 Binding Control System Components Control panel components layout Control System Components Control Panel Devices Maximum Capacity Relay Machine Shutdown Manual Reset MMRHead Relief Request Output Compressor Running Relay Refrigerant Monitor Input 1A17 Exop Epro Enhanced Protection Trmm TRM4 Tracer Comm 4 interfaceCdrp Condenser Refrigerant Pressure Output Condenser Pressure Output Temperature basedCdrp Refrigerant Pressure Output Option 1A15 Pressure based Refrigerant Differential Pressure Indication Output Gbas Generic Building Automation System Percent RLA Output External Current Limit Setpoint Module CharacteristicsExternal Chilled Water Setpoint Ecws Wpsr WFC Water Pressure Sensing Option 1A14 Communication interface Module 1A8, 1A9, 1A11, 1A12 Quad Relay Output Status1A13, 1A18, 1A19, 1A20 Dual Binary input module Analog Input Recommended Length to Run external Output signals1A15, 1A16, 1A17, 1A21 Dual Analog Input/output Module Unit mounted devices Control System Components Control System Components UCP and Wye-Delta Starter Control Circuits Control Sequence of OperationElectrical Sequence Delay time 200 msec. Opens 2K1 Control Sequence of Operation Control Sequence Operation Test and start timing sequence AFD Momentary Power Loss MPL Protection Machine Protection Adaptive Control Current Overload Protection Overload trip time versus percent RLA Reverse Rotation Protection Phase Loss ProtectionCurrent Limit Protection Minimum and Maximum Capacity Limit Differential to Start or StopSoftLoading Leaving Water Temperature Cutout Evaporator Limit Low Refrigerant Temperature Cutout Head Relief Relay Cutout strategy Condenser Limit Restart Inhibit High Vacuum Lockout Oil Temperature Control Maximum Reset Controls Chilled Water Reset CWROutdoor Air Temperature Return Water Constant Return Values for start reset typesDegrees of Reset Equation Reset Ratio Outdoor air temperature versus degrees of reset Reset function for return CWR Reset Ratio = 50% Return CWR Daily Unit Start-Up Unit Start-Up ProceduresUnit Startup Seasonal Unit Start-Up Live Electrical ComponentsToxic Hazards Mode Oil Pump Heater Operation Unit Shutdown ProceduresUnit Shutdown Seasonal Unit Shutdown Moisture Contamination Periodic MaintenanceDaily Maintenance and Checks Record Keeping Forms Hazardous Voltage w/Capacitors Weekly MaintenanceNormal Chiller Operating Characteristics Every 3 Months Off-Season Maintenance Annual Maintenance Heater Damage Oil MaintenanceOil Change Procedure Compressor Oil Change Oil Filter Replacement Replacing Oil Filter Other Maintenance Requirements MaintenanceOil Supply System Problems Hazardous Voltage w/ Capacitors Rotary valve in drain position Front View with Refrigerant Pump Contains Refrigerant Refrigerant Charge Cleaning the Condenser Recovery and Recycle ConnectionsLeak Testing Proper Water Treatment Unit Corrosion Damage Cleaning the EvaporatorControl Settings Adjustments Purge System Unit Preparation 103 104 105 106 107 108 109 110 111 112 113 114 115 Trane