Sterling A0544325 Microprocessor Control, Setting the Process Water Temperature

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5	Microprocessor Control

5-1 Introduction

Standard SMC Series chillers use a microprocessor based controller. The controller is a modular, self-contained unit that can slide from its mounting housing. It is factory set and adjusted; no field adjustment to the internal controls is necessary.

5-2 Setting the Process Water Temperature

•Press until the SP indicator lights.

•Press or to raise or lower the setpoint to the desired leaving water temperature.

Note: SMC leaving water temperature range of operation is 30ºF (-1°C) to 65ºF (18°C).

•Press to display the current process temperature (SP and AL are off).

5-3 Setting the Alarm Value

•Press until AL lights.

•Press or to raise or lower the alarm value. The factory setting is 10, and should be correct for most processes. Setting the alarm value to 10 creates an alarm if the process temperature rises or falls 10ºF/ºC or more from the chiller process setpoint.

•Press to display the current process temperature (SP and AL are off).

SMC Series Chillers

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Contents SMC-050 to SMC-150 Series SMC Series Chillers Safety Considerations Table of Contents Table of Contents Charts and Figures Introduction General InformationNecessary Documents Models CoveredUncrating Your New Chiller Available OptionsIf the Shipment is Not Complete Event of Shipping DamagesIf the Shipment is Incorrect SMC050A Process Pump Curves ReturnsSMC100A Process Pump Curves SMC150A Process Pump Curves SMC-150 25,400 16,000 12A 345 SMC Series Chiller SpecificationsElectrical Connections Chiller InstallationProcess Water Connections Water Reservoir SMC Condenser Air SupplyEthylene Glycol Curve Overhead Piping Overhead Process ConsiderationsChilled Water Circuit Sequence of OperationRefrigeration Circuit Low Pressure Cutout High Pressure CutoutRemote Start/Stop Interlock SMC Component Identification End of unit piping Piping Schematic 1 Pump with ReservoirPiping Schematic 1 Pump without Reservoir Piping Schematic No Pump, No Reservoir SMC Startup Checklist SMC Pre-Startup ChecklistSMC Water Circuit Pressure Drop Table Setting the Alarm Value Setting the Process Water TemperatureMicroprocessor Control SP AL SMC ControlSwitches Indicator LightsOptional Graphic Panel Optional Graphic Panel SMC SeriesCondenser Maintenance Routine MaintenanceLubrication Typical SMC SubpanelTypical SMC Wiring Schematic SMC Wiring Schematic for Chillers with No Pump or Reservoir SMC Series Chillers Problem Possible cause Solution Troubleshooting GuideProblem Possible cause Solution Description SMC Spare Parts ListService Notes Service Notes Milwaukee, WI Sterling/Sterlco5200 West Clinton Avenue 414 Fax 414