Manuals / Sterling / Kitchen Appliance / Refrigerator

Sterling GP Series specifications Mounting Features

Models: GP Series

1 44

Download 44 pages 61.28 Kb

Page 11

interlock. The alarm signals anytime that a fault is recognized during the operation of the chiller.

Communications Options. RS-485 serial Modbus communications.

High Pressure Fans. Provides for an additional 1.0”WC (250 Pa) of static pressure on fan discharge. High-pressure fans are necessary and must be included in chiller installations where exiting air exhausts through ductwork.

They can be retrofitted without sheet metal modification, but will require changing out fan blades, and in some cases, fan motors and electrical components.

Variable Speed Fan. Reduces the speed of the fan based on entering air temperature and system load, allowing the chiller to operate in ambient temperatures below 60ºF (15.5ºC). This option will also reduce fan noise in ambient temperatures below 95ºF (35ºC).

Stainless Steel Reservoir. 5 hp to 15 hp models only. Manufactured from 304 stainless steel.

Mounting Features.

•Mounting rails with feet

Optional Operating Voltages. 208-230/3/60, 575/3/60, and 400/3/50 volt available

UL Labeled Electrical Subpanel. Provides for the subpanel to be listed with Underwriters Laboratory, with UL-related benefits and features.

Optional Pumps. Pump options are available for greater pressure and flow rates. A recirculation pump is required whenever process water flow is less than 1.2 gpm per ton or greater than 4.8 gpm per ton. See Figure 1 on page 12 for optional pump amperages.

NEMA 4 Electrical Enclosure. Provides for NEMA 4-level electrical enclosure protection.

GP Series Portable Chillers

Chapter 2: Functional Description

11 of 44

Image 11

Sterling GP Series specifications Mounting Features

Contents

ECN No Copyright 2009 All rights reserved GP Series Portable ChillersPart Number Bulletin Number SC2-620 Effective 5/1/2009 We are committed to a continuing program of product improvementIf the Shipment is Not Complete Shipping InformationUnpacking and Inspection In the Event of Shipping DamageCHAPTER 2 FUNCTIONAL DESCRIPTION Table of ContentsCHAPTER 1 SAFETY CHAPTER 3 INSTALLATIONCHAPTER 7 APPENDIX CHAPTER 5 MAINTENANCECHAPTER 6 TROUBLESHOOTING Safety Symbols Used in this Manual Chapter 1 Safety1-1 How to Use This Manual SYSTEM. This must be performed by a qualified service technician only 1-2 Warnings and Precautions9 Wear SAFETY GLASSES and WORK GLOVES 9 Use care when LOADING, UNLOADING, RIGGING, or MOVING this equipmentChilled Water Circuit Chapter 2 Functional Description2-1 Models Covered in This Manual 2-2 General DescriptionElectrical Features 2-3 Standard FeaturesMechanical Features Other Mechanical FeaturesOther Features 2-4 Safety Devices and InterlocksRefrigeration Features Controller FeaturesHigh Pressure Cutout 2-5 Optional FeaturesLow Pressure Cutout no switch but done through the transducer Flow SwitchMounting Features Full Load Amps Figure 1 Optional Pump AmperagesVoltage Construction3-2 Electrical Connections Chapter 3 Installation3-1 Uncrating 3-6 Water Treatment Considerations 3-3 Process Water Connections3-4 Bypass Valve Considerations 3-5 Galvanic Corrosion ConsiderationsAir-Cooled Chiller Condensers 3-7 Condenser ConsiderationsWater-Cooled Chiller Condensers Condenser Fan Three-Phase Compressors3-8 Checking Motor Direction Water PumpsDescription 3-9 Water ReservoirPart Number Pe rce nt Glyc ol Cu rves for Free ze P rotec tion Figure 2 Ethylene Glycol and Propylene Glycol CurvesFrom Figure 28, 25F equates to 10% by volume of glycol required Example 45F set point minus 20F = 25F3-11 Initial Start-Up 3-12 Finishing Setup Setting Up Passwords3-10 Automatic Water Make-Up Option Chapter 3 Installation To set password protections1. Press the button to access the menu screen or the following screen for the Supervisor Password21 of 6. Press to accept the Password and move to the next lineChapter 3 Installation GP Series Portable ChillersFigure 3 - Controller Display 4-1 Panel Buttons, Indicator Lights, and SwitchesChapter 4 Operation Microprocessor ControllerFigure 5 - Menu Screen 4-2 Initial Start-upFigure 4 - Main Status Screen Figure 6 - Operator Setpoints Screen Figure 7 - Main Status Screen 4-3 Status Screens26 of 4-4 Access LevelsGP Series Portable Chillers Chapter 4 Operation27 of GP Series Portable ChillersChapter 4 Operation Operator Controller SetpointsFigure 8 - Menu Screen Figure 9 - Operator Setpoints Screen 4-6 Alarms4-7 Optional Communications 31 of GP Series Portable ChillersChapter 4 Operation 5-3 Maintaining the Condenser Chapter 5 Maintenance5-2 Filter Cleaning 5-1 Lubrication5-5 Evaporator Process Piping Y-Strainer 5-6 Preventative Maintenance Service5-4 Maintaining the Evaporator Chapter 6 Troubleshooting 35 of Chapter 6 TroubleshootingGP Series Portable Chillers Credit Returns Warranty ReturnsChapter 7 Appendix 7-1 Returned Material PolicySales Department Service Department7-2 Technical Assistance Parts DepartmentG-PAC-30 7-3 SpecificationsAir-Cooled Portable Chillers G-PAC-20G-PAC-40 GP Series Portable ChillersChapter 7 Appendix 39 ofG-PWC-40 Water-Cooled Portable ChillersG-PWC-20 G-PWC-30G-PWC-50 GP Series Portable ChillersChapter 7 Appendix 41 ofCapacity Gal/min 7-4 Pump Curves, Flow, and Pressure Considerations60 Hertz Pump Curves Head ftCalculating Chiller Nominal Flow and Pressure to Process 7-5 Electrical Schematic