Sterling A0544325 installation manual Overhead Process Considerations, Overhead Piping

Page 16
Vent

2-5 Overhead Process Considerations

If your application has chilled water or process piping above the reservoir fill and vent level, install a standpipe to a point 1’ (30 cm) above the highest point in the system.

In applications where the process or its piping is 15 feet (4.6 m) or more above the reservoir, you must take steps to prevent over-pressurization of the reservoir. This condition can occur on system shutdown when the water in the system drains into the reservoir.

To prevent this, install a check valve in the unit TO PROCESS line and a vacuum breaker at the high point of the return FROM PROCESS line. See Figure 6 on Page 18 for more information.

Note: The reserve capacity of the reservoir can hold a volume equal to 20 feet (6.1 m) of 1-inch(2.5 cm) pipe.

Figure 6

Overhead Piping

The reservoir vent & fill line

to be piped 12" above the highest point of the system. The vent line must remain open to the atmosphere.

Vacuum Breaker

Assembly

Cap

12"Check

Valve

1/8"

 

Hole

1/4"

 

 

6" Min.

 

Process Return

Strainer

Process Supply

Add check valve if system piping extends 15 feet above reservoir.

Indicates end of STERLCO piping

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SMC Series Chillers

 

 

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Contents SMC-050 to SMC-150 Series SMC Series Chillers Safety Considerations Table of Contents Table of Contents Charts and Figures General Information IntroductionNecessary Documents Models CoveredAvailable Options Uncrating Your New ChillerIf the Shipment is Not Complete Event of Shipping DamagesIf the Shipment is Incorrect SMC050A Process Pump Curves ReturnsSMC100A Process Pump Curves SMC150A Process Pump Curves SMC Series Chiller Specifications SMC-150 25,400 16,000 12A 345Electrical Connections Chiller InstallationProcess Water Connections SMC Condenser Air Supply Water ReservoirEthylene Glycol Curve Overhead Process Considerations Overhead PipingChilled Water Circuit Sequence of OperationRefrigeration Circuit Low Pressure Cutout High Pressure CutoutRemote Start/Stop Interlock SMC Component Identification Piping Schematic 1 Pump with Reservoir End of unit pipingPiping Schematic 1 Pump without Reservoir Piping Schematic No Pump, No Reservoir SMC Pre-Startup Checklist SMC Startup ChecklistSMC Water Circuit Pressure Drop Table Setting the Alarm Value Setting the Process Water TemperatureMicroprocessor Control SMC Control SP ALSwitches Indicator LightsOptional Graphic Panel SMC Series Optional Graphic PanelRoutine Maintenance Condenser MaintenanceLubrication Typical SMC SubpanelTypical SMC Wiring Schematic SMC Wiring Schematic for Chillers with No Pump or Reservoir SMC Series Chillers Troubleshooting Guide Problem Possible cause SolutionProblem Possible cause Solution SMC Spare Parts List DescriptionService Notes Service Notes Milwaukee, WI Sterling/Sterlco5200 West Clinton Avenue 414 Fax 414
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