Checking Motor Direction, Three-Phase Compressors | HP A0554832

3-8 Checking Motor Direction

All of our portable chillers have their motor rotations properly phased at the factory. If compressors, pumps, or fans are running in reverse rotation, disconnect and lock out the power source and reverse any two power leads into the chiller disconnect switch.

Caution! Do not switch leads at the motors, motor starters, or contactors.

Three-Phase Compressors

Scroll compressors are directionally-dependent and compress in one rotational direction. Reversing rotation direction results in an elevated sound level and a substantially-reduced current draw.

Water Pumps

Correct pump rotation is indicated by a positive pressure of 20 to 40 psi on the pump pressure gauge. Pump rotation should be clockwise when viewed from the motor end. For chillers with optional pumps, check the appropriate pump curve in the Appendix.

Caution! Do not run pump dry. Doing so will result in seal damage.

Condenser Fan

Air should be drawn through the condenser and discharged vertically from the chiller.

2-40 HP Portable Chillers

Chapter 3: Installation

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HP A0554832 manual Checking Motor Direction, Three-Phase Compressors, Water Pumps, Condenser Fan

Contents

Hp Portable Chillers Shipping Information Table of Contents Operation HP Portable Chillers Safety How to Use This ManualSafety Symbols Used in this Manual Wear Safety Glasses and Work Gloves Responsibility Functional Description Models Covered in This Manual General Description Chilled Water CircuitRefrigeration Circuit Standard Features Mechanical FeaturesOther Mechanical Features Electrical Features Refrigeration FeaturesController Features Other Features Safety Devices and Interlocks High/Low Thermostat ControlCrankcase Heater High Pressure Cutout Oil Pressure Safety Switch Fan Cycling SwitchPressure Switch Flow Switch Optional Features Mounting Features Optional Pump Amperages Voltage Construction Full Load Amps Installation UncratingElectrical Connections Process Water Connections Bypass Valve ConsiderationsGalvanic Corrosion Considerations Water Treatment Considerations Condenser Considerations Water-Cooled Chiller CondensersAir-Cooled Chiller Condensers Remote Air-Cooled Chiller Condensers Page Equivalent Length in Feet for Valves and Fittings Chiller Condenser Charge Field Installed Piping Charge Refrigerant Charge Determination Three-Phase Compressors Checking Motor DirectionWater Pumps Condenser Fan Water Reservoir Part Number Description Ethylene Glycol and Propylene Glycol Curves Automatic Water Make-Up Option Initial Start-Up Panel Buttons, Indicator Lights, and Switches E5CK Controller Indicator Name DescriptionOperation Microprocessor Controllers Indicator Name Description Sterlco 2000 Controller Indicator Name Description 2000 See on Indicator Name Description Graphic Panel Indicator Name Description Typical Graphic Panels With E5CK Controller With Sterlco 2000 Controller Setting the Process Water Temperatures Auto-TuningStart-up Optional Communications Thermostat Buttons Indicator Name Description Programming the Electronic High/Low Thermostat Stage 2 High Temperature Protection Select Fahrenheit or CelsiusStage 1 Freeze Protection Maintenance Filter CleaningLubrication Maintaining the Condenser Maintaining the EvaporatorEvaporator Process Piping Y-Strainer Air- and Remote Air-Cooled Chillers Preventative Maintenance Service Troubleshooting HP Portable Chillers Troubleshooting HP Portable Chillers Troubleshooting Warranty Appendix Service Department Technical AssistanceParts Department Sales Department Drawings and Specifications Hp and 3 1/2 hp Air-Cooled Portable Chillers Hp and 7.5 hp Air-Cooled Portable Chillers Hp and 15 hp Air-Cooled Portable Chillers 20 hp, 25 hp, and 30 hp Air-Cooled Portable Chillers Hp and 3.5 hp Water-Cooled Portable Chillers Nominal Condenser water Nominal cooling Water ComIn. NPT Height Width Depth Lbs Hp and 7.5 hp Water-Cooled Portable Chillers Hp and 15 hp Water-Cooled Portable Chillers 20 hp, 25 hp, and 30 hp Water-Cooled Portable Chillers Hp and 40 hp Water-Cooled Portable Chillers Nominal cooling Com Refrigeration Power in amps e Hp and 7.5 hp Remote Air-Cooled Portable Chillers12.8 17.3 748 Hp and 15 hp Remote Air-Cooled Portable Chillers Nominal cooling Com RefrigerationPres Nom Connections 15.0 40.9 34.0 74.7 Hp through 40 hp Remote Air-Cooled Portable Chillers To/from No tank Tank, to/from Height Width Depth Lbs Remote Condenser Assembly Models ‘A’in ‘B’in ‘C’in ‘D’in ODSin Pump Curves, Flow, and Pressure Considerations Hertz Pump Curves DWG. No. S0554823 Water Pressure Drop Tables Calculating Chiller Nominal Flow and Pressure to Process Recirculation Pump Specifications Recirc. power Flow Rate ∆ pressure Gpm Lpm Psi KPaFlow and Pressure Considerations Remote Air-Cooled Chiller Configurations Configuration aConfiguration B Configuration C Typical Ductwork for Air-Cooled Chillers Piping Diagrams Central and Gravity Return Piping with Standpipe Diagram Typical Piping Schematic, 2 and 3 1/2 hp Models HP Portable Chillers Appendix HP Portable Chillers Appendix Typical Piping Schematic, 5 hp through 40 hp, No-Pump Models HP Portable Chillers Appendix Electrical Schematics Time-delay Relays Disconnect Switch OptionalTypical Electrical Subpanel Speed Fuses Typical Electrical Schematic, 2 hp and 3 1/2 hp Models Typical Power Wiring Schematic, 5 hp through 40 hp Models A0554815 HP Portable Chillers Appendix DWG A0554931 DWG A0562343 DWG A0562435 Typical Wiring Schematic, 35 hp and 40 hp Models with Pump DWG A0562434