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Sterling GP Series Operation, Panel Buttons, Indicator Lights, and Switches, Controller Display

Models: GP Series

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Chapter 4: Operation

Chapter 4: Operation

4-1 Panel Buttons, Indicator Lights, and Switches

Microprocessor Controller

The standard chillers use a microprocessor-based PID controller. The Carel PCO controller along with the Carel PGD1 Interface 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. The standard operation range is 20ºF to 80ºF (-7ºC to 27ºC).

Figure 3 - Controller Display

Button	Button Description		Detailed description
	Menu Button		Used to access the menus structure of the PGD interface
			Used to access the menus structure of the PGD interface

	On/Off Button		Used to turn the entire chiller On or Off. The button is backlit and will
			turn amber when the chiller is On.

	Back Button		Used to back up from a menu and return to the main status screen


	Up Arrow Button		Used to increment a data field or scroll up within a menu structure.


	Enter Button		Used to accept a data field value or to select a menu item.
			Used to accept a data field value or to select a menu item.

	Down Arrow Button		Used to decrement a data field or scroll down within a menu structure.

GP Series Portable Chillers

Chapter 4: Operation

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Sterling GP Series Operation, Panel Buttons, Indicator Lights, and Switches, Microprocessor Controller, Controller Display

Contents

We are committed to a continuing program of product improvement GP Series Portable ChillersPart Number Bulletin Number SC2-620 Effective 5/1/2009 ECN No Copyright 2009 All rights reservedIn the Event of Shipping Damage Shipping InformationUnpacking and Inspection If the Shipment is Not CompleteCHAPTER 3 INSTALLATION Table of ContentsCHAPTER 1 SAFETY CHAPTER 2 FUNCTIONAL DESCRIPTIONCHAPTER 6 TROUBLESHOOTING CHAPTER 5 MAINTENANCECHAPTER 7 APPENDIX 1-1 How to Use This Manual Chapter 1 SafetySafety Symbols Used in this Manual 9 Use care when LOADING, UNLOADING, RIGGING, or MOVING this equipment 1-2 Warnings and Precautions9 Wear SAFETY GLASSES and WORK GLOVES SYSTEM. This must be performed by a qualified service technician only2-2 General Description Chapter 2 Functional Description2-1 Models Covered in This Manual Chilled Water CircuitOther Mechanical Features 2-3 Standard FeaturesMechanical Features Electrical FeaturesController Features 2-4 Safety Devices and InterlocksRefrigeration Features Other FeaturesFlow Switch 2-5 Optional FeaturesLow Pressure Cutout no switch but done through the transducer High Pressure CutoutMounting Features Construction Figure 1 Optional Pump AmperagesVoltage Full Load Amps3-1 Uncrating Chapter 3 Installation3-2 Electrical Connections 3-5 Galvanic Corrosion Considerations 3-3 Process Water Connections3-4 Bypass Valve Considerations 3-6 Water Treatment ConsiderationsWater-Cooled Chiller Condensers 3-7 Condenser ConsiderationsAir-Cooled Chiller Condensers Water Pumps Three-Phase Compressors3-8 Checking Motor Direction Condenser FanPart Number 3-9 Water ReservoirDescription Example 45F set point minus 20F = 25F Figure 2 Ethylene Glycol and Propylene Glycol CurvesFrom Figure 28, 25F equates to 10% by volume of glycol required Pe rce nt Glyc ol Cu rves for Free ze P rotec tion3-10 Automatic Water Make-Up Option 3-12 Finishing Setup Setting Up Passwords3-11 Initial Start-Up or the following screen for the Supervisor Password To set password protections1. Press the button to access the menu screen Chapter 3 InstallationGP Series Portable Chillers 6. Press to accept the Password and move to the next lineChapter 3 Installation 21 ofMicroprocessor Controller 4-1 Panel Buttons, Indicator Lights, and SwitchesChapter 4 Operation Figure 3 - Controller DisplayFigure 4 - Main Status Screen 4-2 Initial Start-upFigure 5 - Menu Screen Figure 6 - Operator Setpoints Screen 4-3 Status Screens Figure 7 - Main Status ScreenChapter 4 Operation 4-4 Access LevelsGP Series Portable Chillers 26 ofChapter 4 Operation GP Series Portable Chillers27 of Controller Setpoints OperatorFigure 8 - Menu Screen 4-7 Optional Communications 4-6 AlarmsFigure 9 - Operator Setpoints Screen Chapter 4 Operation GP Series Portable Chillers31 of 5-1 Lubrication Chapter 5 Maintenance5-2 Filter Cleaning 5-3 Maintaining the Condenser5-4 Maintaining the Evaporator 5-6 Preventative Maintenance Service5-5 Evaporator Process Piping Y-Strainer Chapter 6 Troubleshooting GP Series Portable Chillers Chapter 6 Troubleshooting35 of 7-1 Returned Material Policy Warranty ReturnsChapter 7 Appendix Credit ReturnsParts Department Service Department7-2 Technical Assistance Sales DepartmentG-PAC-20 7-3 SpecificationsAir-Cooled Portable Chillers G-PAC-3039 of GP Series Portable ChillersChapter 7 Appendix G-PAC-40G-PWC-30 Water-Cooled Portable ChillersG-PWC-20 G-PWC-4041 of GP Series Portable ChillersChapter 7 Appendix G-PWC-50Head ft 7-4 Pump Curves, Flow, and Pressure Considerations60 Hertz Pump Curves Capacity Gal/minCalculating Chiller Nominal Flow and Pressure to Process 7-5 Electrical Schematic