Afd | American Standard CH530 instruction

Control Sequence of Operation

Current passing through circuit breaker 1Q5 reaches 2 normally open parallel sets of contacts: those of refrigerant and oil pump relay (1A7- J2-5 to 1), and the 2K11 interlocking relay. Connected at module 1A7-J2-2 to 4.

Note: While the (1A7-J2-5 to 1) relay automatically is closed by the main processor 1A22 as a part of the start sequence. It can also be closed manually by changing the oil pump status to “ON” in the manual over ride mode menu of DynaView™.

Closure of the (1A7-J2-5 to 1), or 2K11 contacts also allows current to pass through the coil of the refrigerant

pump starter relay (4K8), to the start windings of the refrigerant pump. When motor 4M3 first starts, current draw is high: This causes current sensing relay 4K8 to close its normally open contacts and pull in of pump Capacitor 4C1. Increasing motor speed and related decreasing current through the main winding and relay coil reduce the magnetic force and the armature “Drops out” to open the start contacts and disconnect the start windings and capacitor. Current now flows only to the Run windings of the oil pump motor or refrigerant and oil pump motor.

Maximum Acceleration

Timer Setting

by Starter Type

Wye-Delta	27 Seconds
Auto-Transformer	16
Primary Reactor	16
Across the Line	6
Solid State	15
AFD	30

CDHF-SVU01C-EN

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American Standard CH530 manual Afd

Contents

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