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Sterling 882.93092.00 specifications Operation, Panel Buttons, Indicator Lights, and Switches

Models: 882.93092.00

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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 7 - 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

29 of 73

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Sterling 882.93092.00 specifications Operation, Panel Buttons, Indicator Lights, and Switches, Microprocessor Controller

Contents

Part Number Bulletin Number SC2-620.2 Effective 1/12/2010 GP Series Portable ChillersWe are committed to a continuing program of product improvement ECN No Copyright 2010 All rights reservedUnpacking and Inspection Shipping InformationIn the Event of Shipping Damage If the Shipment is Not CompleteCHAPTER 1 SAFETY Table of ContentsCHAPTER 3 INSTALLATION Flow SwitchCHAPTER 7 APPENDIX CHAPTER 5 MAINTENANCECHAPTER 6 TROUBLESHOOTING Safety Symbols Used in this Manual Chapter 1 Safety1-1 How to Use This Manual 9 Wear SAFETY GLASSES and WORK GLOVES 1-2 Warnings and Precautions9 Use care when LOADING, UNLOADING, RIGGING, or MOVING this equipment SYSTEM. This must be performed by a qualified service technician only2-1 Models Covered in This Manual Chapter 2 Functional Description2-2 General Description Chilled Water CircuitMechanical Features 2-3 Standard FeaturesOther Mechanical Features Electrical FeaturesRefrigeration Features 2-4 Safety Devices and InterlocksController Features Other FeaturesLow Pressure Cutout no switch but done through the transducer 2-5 Optional FeaturesFlow Switch High Pressure CutoutMounting Features Voltage Figure 1 Optional Pump AmperagesConstruction Full Load Amps3-2 Electrical Connections Chapter 3 Installation3-1 Uncrating 3-4 Bypass Valve Considerations 3-3 Process Water Connections3-5 Galvanic Corrosion Considerations 3-6 Water Treatment ConsiderationsWater-Cooled Chiller Condensers 3-7 Condenser ConsiderationsAir-Cooled Chiller Condensers Remote Air-Cooled Chiller CondensersNote Piping should be type “L” or type “K” refrigerant grade copper tubing only. Proper sizing and installation has a significant effect on system performance, reliability, and safety 17 of Chapter 3 InstallationGP Series Portable Chillers Figure 3 Liquid Line Sizing Figure 2 Equivalent Length in Feet for Valves and FittingsLine Size AngleTotal Equiv 10 TON CIRCUITLength Ft 20 TON CIRCUITTotal Equiv 30 TON CIRCUITLength Ft 50 TON CIRCUITChapter 3 Installation Figure 4 Discharge Line SizingGP Series Portable Chillers 21 ofFigure 5 Refrigerant Charge Determination 3-8 Checking Motor Direction Three-Phase CompressorsWater Pumps Condenser FanDescription 3-9 Water ReservoirPart Number From Figure 28, 25F equates to 10% by volume of glycol required Figure 6 Ethylene Glycol and Propylene Glycol Curvespump Example 45F set point minus 20F = 25F3-11 Initial Start-Up 3-12 Finishing Setup Setting Up Passwords3-10 Automatic Water Make-Up Option 1. Press the button to access the menu screen To set password protectionsor the following screen for the Supervisor Password Chapter 3 InstallationChapter 3 Installation 6. Press to accept the Password and move to the next lineGP Series Portable Chillers 28 ofChapter 4 Operation 4-1 Panel Buttons, Indicator Lights, and SwitchesMicroprocessor Controller Figure 7 - Controller DisplayFigure 9 - Menu Screen 4-2 Initial Start-upFigure 8 - Main Status Screen Figure 11 - Main Status Screen 4-3 Status ScreensFigure 10 - Operator Setpoints Screen 32 of GP Series Portable ChillersChapter 4 Operation 4-4 Access Levels Figure 12 - Menu Screen Controller SetpointsFigure 13 - Operator Setpoints Screen 4-6 Alarms4-7 Optional Communications 36 of GP Series Portable ChillersChapter 4 Operation 37 of GP Series Portable ChillersChapter 4 Operation 5-2 Filter Cleaning Chapter 5 Maintenance5-1 Lubrication 5-3 Maintaining the Condenser5-5 Evaporator Process Piping Y-Strainer 5-6 Preventative Maintenance Service5-4 Maintaining the Evaporator Chapter 6 Troubleshooting 41 of Chapter 6 TroubleshootingGP Series Portable Chillers Chapter 7 Appendix Warranty Returns7-1 Returned Material Policy Credit Returns7-2 Technical Assistance Service DepartmentParts Department Sales DepartmentAir-Cooled Portable Chillers 7-3 SpecificationsG-PAC-20 G-PAC-30Chapter 7 Appendix GP Series Portable Chillers45 of G-PAC-40Chapter 7 Appendix GP Series Portable Chillers46 of GPAC-70Chapter 7 Appendix GP Series Portable Chillers47 of GPAC-105Chapter 7 Appendix GP Series Portable Chillers48 of GPAC-175G-PWC-30 Water-Cooled Portable ChillersG-PWC-20 Chapter 7 Appendix GP Series Portable Chillers50 of G-PWC-40Chapter 7 Appendix GP Series Portable Chillers51 of GPWC-70Chapter 7 Appendix GP Series Portable Chillers52 of GPWC-105Chapter 7 Appendix GP Series Portable Chillers53 of GPWC-1755-15 ALL 60 Hz 7-4 Pump Curves, Flow, and Pressure Considerations60 Hertz Pump Curves Head ftCapacity Gal/min 70-210 ALL 60 HzHead ft 50 Hertz Pump Curves 5-15 ALL 50 HzACS CHILLER PUMPS Head mACS CHILLER PUMPS 20-50 ALL 50 HzHead m Capacity liter/minPure Water at 40F Calculating Chiller Nominal Flow and Pressure to ProcessGP Series Portable Chillers 7-5 Remote Air-Cooled Chiller ConfigurationsChapter 7 Appendix 59 of7-6 Typical Ductwork for Air-Cooled Chillers 61 of GP Series Portable ChillersChapter 7 Appendix GP Series Portable Chillers 7-7 Piping DiagramsChapter 7 Appendix 62 of63 of GP Series Portable ChillersChapter 7 Appendix 64 of GP Series Portable ChillersChapter 7 Appendix 65 of GP Series Portable ChillersChapter 7 Appendix 66 of GP Series Portable ChillersChapter 7 Appendix 67 of GP Series Portable ChillersChapter 7 Appendix 68 of GP Series Portable ChillersChapter 7 Appendix 69 of GP Series Portable ChillersChapter 7 Appendix 70 of GP Series Portable ChillersChapter 7 Appendix 71 of GP Series Portable ChillersChapter 7 Appendix 72 of GP Series Portable ChillersChapter 7 Appendix 73 of GP Series Portable ChillersChapter 7 Appendix