Gbas Generic Building Automation System | American Standard CH530

Control System

Components

GBAS (Generic Building Automation System)

1A15 Optional Dual	GBAS	Signal #1	Percent RLA Compressor Output	J2-1 Output #1, J2-3 Ground
Analog Input/
output Module
1A16 Optional Dual	GBAS	Signal #1	External Current limit Setpoint	J2-2 Input #1, J2-3 Ground
Analog Input/
output Module
1A16 Optional Dual	GBAS	Signal #2	Chilled Water Reset input,	J2-5 Input #2, J2-6 Ground
Analog Input/			or External Chiller Water Setpoint
output Module

Percent RLA Output

2 to 10 Vdc corresponding to 0 to

120% RLA. With a resolution of 0.146%. The Percent RLA Output connections are on the terminals 1A15 –J2-1 (+) to J2-3 (Ground). The Percent RLA Output is polarity sensitive.

The following graph illustrates the output:

Figure 27. Voltage versus percent RLA

60	CDHF-SVU01C-EN

Image 60

American Standard CH530 manual Gbas Generic Building Automation System, Percent RLA Output

Contents

X39640670030CDHF-SVU01C-EN Read these carefully Contents General Information Literature changeAbout this manual 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 Power Up Diagram Software Operation Overview DiagramSoftware States Figure 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 Start to Start Time Setting Restart InhibitRestart Inhibit Free Starts 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 Control Panel Devices and Unit Mounted DevicesUnit Control Panel UCP 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 Chiller Operating Mode Circuit Operating ModeMain Screen Main Screen Data Fields Table Diagnostic Screen Back button provides navigation back to the chiller screen Operator Interface Report Menu Reports Report name System Evaporator Report name Circuit EvaporatorReport name System Condenser Report name Circuit Condenser Historic Diagnostics Log Report name System Ashrae Chiller Log Setting Tab screens provides a user Header Screen Feature Settings Chiller System Mode Overrides Circuit Mode OverridesDisplay Settings Purge Operator Interface Operator Interface Operator Interface Operator Interface Operator Interface Interprocessor Communication Inter Processor Communications IPC3IPC3 Definitions Bus Management Binding Control System Components Control panel components layout Control System Components Control Panel Devices Machine Shutdown Manual Reset MMR Head Relief Request OutputMaximum Capacity Relay Compressor Running Relay Refrigerant Monitor Input 1A17 Exop Trmm TRM4 Tracer Comm 4 interface Cdrp Condenser Refrigerant Pressure OutputEpro Enhanced Protection Temperature based Cdrp Refrigerant Pressure Output Option 1A15Condenser Pressure Output Pressure based Refrigerant Differential Pressure Indication Output Gbas Generic Building Automation System Percent RLA Output Module Characteristics External Chilled Water Setpoint EcwsExternal Current Limit Setpoint Wpsr WFC Water Pressure Sensing Option 1A8, 1A9, 1A11, 1A12 Quad Relay Output Status 1A13, 1A18, 1A19, 1A20 Dual Binary input module1A14 Communication interface Module Recommended Length to Run external Output signals 1A15, 1A16, 1A17, 1A21 Dual Analog Input/output ModuleAnalog Input Unit mounted devices Control System Components Control System Components Control Sequence of Operation Electrical SequenceUCP and Wye-Delta Starter Control Circuits 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 Phase Loss Protection Current Limit ProtectionReverse Rotation Protection Differential to Start or Stop SoftLoadingMinimum and Maximum Capacity Limit 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 Controls Chilled Water Reset CWR Outdoor Air TemperatureMaximum Reset Return Water Values for start reset types Degrees of ResetConstant Return Equation Reset Ratio Outdoor air temperature versus degrees of reset Reset function for return CWR Reset Ratio = 50% Return CWR Unit Start-Up Procedures Unit StartupDaily Unit Start-Up Live Electrical Components Toxic HazardsSeasonal Unit Start-Up Mode Unit Shutdown Procedures Unit ShutdownOil Pump Heater Operation Seasonal Unit Shutdown Periodic Maintenance Daily Maintenance and ChecksMoisture Contamination Record Keeping Forms Weekly Maintenance Normal Chiller Operating CharacteristicsHazardous Voltage w/Capacitors Every 3 Months Off-Season Maintenance Annual Maintenance Oil Maintenance Oil Change ProcedureHeater Damage Compressor Oil Change Oil Filter Replacement Replacing Oil Filter Maintenance Oil Supply System ProblemsOther Maintenance Requirements Hazardous Voltage w/ Capacitors Rotary valve in drain position Front View with Refrigerant Pump Contains Refrigerant Refrigerant Charge Recovery and Recycle Connections Leak TestingCleaning the Condenser Proper Water Treatment Cleaning the Evaporator Control Settings AdjustmentsUnit Corrosion Damage Purge System Unit Preparation 103 104 105 106 107 108 109 110 111 112 113 114 115 Trane