Sterling GP Series - Manual

GP Series Portable Chillers Chapter 1: Safety 6 of 44 1-2 Warnings and Precautions Our equipment is designed to provide safe and reliable operation when installed and operated within design specifications, following national and local safety codes. To avoid possible personal injury or equipment dama...

GP Series Portable Chillers Chapter 2: Functional Description 7 of 44 Chapter 2: Functional Description 2-1 Models Covered in This Manual This manual provides operation, installation, and maintenance instructions for air-, water-and remote air-cooled portable chillers. Model numbers are listed on th...

GP Series Portable Chillers Chapter 2: Functional Description 8 of 44 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...

GP Series Portable Chillers Chapter 2: Functional Description 9 of 44 Refrigeration Features • HFC-410a refrigerant • Electronic hot gas bypass capacity control • High refrigerant pressure cutout switches • Suction and discharge pressure transducers. • High pressure spring actuated relief valve • Mu...

GP Series Portable Chillers Chapter 2: Functional Description 12 of 44 Figure 1: Optional Pump Amperages Voltage Construction HP Full Load Amps 460/3/60 SS 1 1.7 1.5 2.3 2 4.0 3 4.2 5 8.2 10 12.0

GP Series Portable Chillers Chapter 3: Installation 13 of 44 Chapter 3: Installation 3-1 Uncrating All models are are shipped mounted on a skid, enclosed in a plastic wrapper, and open-crated on all four sides and top. 1. Pry the crating away from the skid. 2. Use a pry bar to remove the blocks secu...

GP Series Portable Chillers Chapter 3: Installation 15 of 44 3-7 Condenser Considerations Water-Cooled Chiller Condensers Water-cooled portable chillers can use city water or tower water as a cooling medium. Make sure that all external piping and connections supplying and discharging water to and fr...

GP Series Portable Chillers Chapter 3: Installation 16 of 44 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 t...

GP Series Portable Chillers Chapter 3: Installation 17 of 44 3-9 Water Reservoir All portable chillers shipped during the fall, winter, or spring, or those units that are shipped from stock are flushed at the factory with a water/ethylene glycol solution to prevent piping components prone to retaini...

GP Series Portable Chillers Chapter 3: Installation 18 of 44 Figure 2: Ethylene Glycol and Propylene Glycol Curves Pe r ce n t G lyc o l Cu rves fo r F ree z e P r o tec t ion -60.0 -50.0 -40.0 -30.0 -20.0 -10.0 0.0 10.0 20.0 30.0 40.0 0.0 10.0 20.0 30.0 40.0 50.0 60.0 % Gl y col b y V ol um e Eth y...

GP Series Portable Chillers Chapter 3: Installation 19 of 44 3-10 Automatic Water Make-Up Option The chiller may be connected to an automatic make-up system if the optional package (pipe fittings, solenoid valve and 1/2” NPT city water make-up connection) is factory installed. If the automatic make-...

GP Series Portable Chillers Chapter 4: Operation 22 of 44 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-...

GP Series Portable Chillers Chapter 4: Operation 24 of 44 Enter the established Operator Password by depressing the to move the position of the cursor, and then depressing the or button to increment or decrement the number. Once all of the numbers have been entered depress the to accept the password...

GP Series Portable Chillers Chapter 4: Operation 25 of 44 Elevated sound level and substantially reduced current draw indicate reverse rotation. After several minutes of operation, the compressor internal protector trips. 4-3 Status Screens The controller has eight (8) preconfigured status screens. ...

GP Series Portable Chillers Chapter 4: Operation 26 of 44 4-4 Access Levels The controller is setup to allow access to three distinct password groups: operator, supervisor, and service. Operator access allows the user to modify the Leaving Water Temp, Hi Temp

GP Series Portable Chillers Chapter 4: Operation 28 of 44 4-5 Controller Setpoints Access Level Variable Description Operator Supervisor Leaving Temp Temperature of fluid out to process x x Hi Temp Warning Setpoint for alarm to warn when leaving fluid temperature is too high x x Hi Temp Fault Setpoi...

GP Series Portable Chillers Chapter 4: Operation 29 of 44 1. Set the Leaving Fluid temperature by depressing the button to display the menu. Figure 8 - Menu Screen 2. Depress the or button to highlight SETPOINTS and press . If passwords were setup (See Section 3-12 for information on the controller ...

GP Series Portable Chillers Chapter 4: Operation 30 of 44 the to accept the password. The following screen will appear. Figure 9 - Operator Setpoints Screen 3. Depress to move the cursor to the Leaving Temp line. Use the or button to increment or decrement the value. Depress to accept the value and ...

GP Series Portable Chillers Chapter 5: Maintenance 32 of 44 Chapter 5: Maintenance 5-1 Lubrication Grease all blower bearings, fan and blower motors, and pump motors that do not have permanently sealed bearings. Be sure to use an all-purpose industrial grease with a temperature reference of 185 ˚ F ...

GP Series Portable Chillers Chapter 6: Troubleshooting 34 of 44 Chapter 6: Troubleshooting Problem Possible cause Solution No power. Check main disconnect, fuses, wiring, and power lead to unit. Wrong voltage supplied to unit. Voltage must be within plus or minus 10% of nameplate rating. Defective o...

GP Series Portable Chillers Chapter 7: Appendix 36 of 44 Chapter 7: Appendix 7-1 Returned Material Policy Credit Returns Prior to the return of any material, authorization must be given by the manufacturer . A RMS number will be assigned for the equipment to be returned. Reason for requesting the re...

GP Series Portable Chillers Chapter 7: Appendix 37 of 44 7-2 Technical Assistance Parts Department Call toll-free 7am–5pm CST [800] 423-3183 or call [262] 641-8610, Fax [262] 641-8653 The ACS Customer Service Group will provide your company with genuine OEM quality parts manufactured to engineering ...

GP Series Portable Chillers Chapter 7: Appendix 44 of 44 7-5 Electrical Schematic Please refer to your owner’s information packet for more details regarding your specific unit .