Manuals / Sterling / Kitchen Appliance / Refrigerator

Sterling GP Series specifications Standard Features, on remotes, Other Mechanical Features

Models: GP Series

1 44

Download 44 pages 61.28 Kb

Page 8

The refrigerant is compressed in the compressor and flows through the discharge line as a gas to the condenser. There it gives up its heat as it condenses to a liquid in the condenser.

An electronic hot gas bypass valve is used to control cooling capacity during intermittent or partial load conditions. This feature contributes substantially to chiller longevity by eliminating excessive cycling of the compressor and providing close temperature control.

2-3 Standard Features

Mechanical Features

Compressor. Hermetic scroll compressors.

Evaporator. Stainless steel copper brazed plate evaporators.

Air-Cooled Condenser. Aluminum fin/ tube with washable filters, package unit only (option

on remotes).

Water-Cooled Condenser. Tube-in-tube condensers. All come with electronic cooling water regulating valves for cooling tower water or city water.

Remote Air-Cooled Condenser. Aluminum fin/tube with low ambient control down to – 20ºF (-29ºC) via a variable-speed primary fan.

Reservoir. 5 hp and 7.5 hp models use a 20 gallon polyethylene tank. 10 hp and 15 hp models use a 40 gallon polyethylene tank.

Piping. Non-ferrous piping

Pump. TEFC motors (Optional 10 HP is ODP only)—horizontally mounted stamped stainless steel construction.

Other Mechanical Features

•Low process water thermal flow switch

•NEMA-rated fan motor(s) on air-cooled models

•Galvanized structural steel frame, painted cabinetry, with 4” (locking) swivel casters

•Internal process water bypass valve for system protection only

•Fully insulated refrigeration and process water piping

•20 mesh Y strainer on process water piping into the evaporator

•Tank level indication

•Pump pressure indication

Electrical Features

•Fully accessible NEMA 12-style electrical control enclosure

•Single-point power and ground connection

•Non-fused disconnect switch, lockable

•Branch circuit fusing

•208-230/3/60, 460/3/60, 575/3/60 volt; 400/3/50 volt

GP Series Portable Chillers

Chapter 2: Functional Description

8 of 44

Image 8

Sterling GP Series specifications Standard Features, on remotes, Other Mechanical Features, Electrical Features

Contents

GP Series Portable Chillers Part Number Bulletin Number SC2-620 Effective 5/1/2009We are committed to a continuing program of product improvement ECN No Copyright 2009 All rights reservedShipping Information Unpacking and InspectionIn the Event of Shipping Damage If the Shipment is Not CompleteTable of Contents CHAPTER 1 SAFETYCHAPTER 3 INSTALLATION CHAPTER 2 FUNCTIONAL DESCRIPTIONCHAPTER 7 APPENDIX CHAPTER 5 MAINTENANCECHAPTER 6 TROUBLESHOOTING Safety Symbols Used in this Manual Chapter 1 Safety1-1 How to Use This Manual 1-2 Warnings and Precautions 9 Wear SAFETY GLASSES and WORK GLOVES9 Use care when LOADING, UNLOADING, RIGGING, or MOVING this equipment SYSTEM. This must be performed by a qualified service technician onlyChapter 2 Functional Description 2-1 Models Covered in This Manual2-2 General Description Chilled Water Circuit2-3 Standard Features Mechanical FeaturesOther Mechanical Features Electrical Features2-4 Safety Devices and Interlocks Refrigeration FeaturesController Features Other Features2-5 Optional Features Low Pressure Cutout no switch but done through the transducerFlow Switch High Pressure CutoutMounting Features Figure 1 Optional Pump Amperages VoltageConstruction Full Load Amps3-2 Electrical Connections Chapter 3 Installation3-1 Uncrating 3-3 Process Water Connections 3-4 Bypass Valve Considerations3-5 Galvanic Corrosion Considerations 3-6 Water Treatment ConsiderationsAir-Cooled Chiller Condensers 3-7 Condenser ConsiderationsWater-Cooled Chiller Condensers Three-Phase Compressors 3-8 Checking Motor DirectionWater Pumps Condenser FanDescription 3-9 Water ReservoirPart Number Figure 2 Ethylene Glycol and Propylene Glycol Curves From Figure 28, 25F equates to 10% by volume of glycol requiredExample 45F set point minus 20F = 25F Pe rce nt Glyc ol Cu rves for Free ze P rotec tion3-11 Initial Start-Up 3-12 Finishing Setup Setting Up Passwords3-10 Automatic Water Make-Up Option To set password protections 1. Press the button to access the menu screenor the following screen for the Supervisor Password Chapter 3 Installation6. Press to accept the Password and move to the next line Chapter 3 InstallationGP Series Portable Chillers 21 of4-1 Panel Buttons, Indicator Lights, and Switches Chapter 4 OperationMicroprocessor Controller Figure 3 - Controller DisplayFigure 5 - Menu Screen 4-2 Initial Start-upFigure 4 - Main Status Screen Figure 6 - Operator Setpoints Screen 4-3 Status Screens Figure 7 - Main Status Screen4-4 Access Levels GP Series Portable ChillersChapter 4 Operation 26 of27 of GP Series Portable ChillersChapter 4 Operation Controller Setpoints OperatorFigure 8 - Menu Screen Figure 9 - Operator Setpoints Screen 4-6 Alarms4-7 Optional Communications 31 of GP Series Portable ChillersChapter 4 Operation Chapter 5 Maintenance 5-2 Filter Cleaning5-1 Lubrication 5-3 Maintaining the Condenser5-5 Evaporator Process Piping Y-Strainer 5-6 Preventative Maintenance Service5-4 Maintaining the Evaporator Chapter 6 Troubleshooting 35 of Chapter 6 TroubleshootingGP Series Portable Chillers Warranty Returns Chapter 7 Appendix7-1 Returned Material Policy Credit ReturnsService Department 7-2 Technical AssistanceParts Department Sales Department7-3 Specifications Air-Cooled Portable ChillersG-PAC-20 G-PAC-30GP Series Portable Chillers Chapter 7 Appendix39 of G-PAC-40Water-Cooled Portable Chillers G-PWC-20G-PWC-30 G-PWC-40GP Series Portable Chillers Chapter 7 Appendix41 of G-PWC-507-4 Pump Curves, Flow, and Pressure Considerations 60 Hertz Pump CurvesHead ft Capacity Gal/minCalculating Chiller Nominal Flow and Pressure to Process 7-5 Electrical Schematic