Sterling A0544325 installation manual SMC Condenser Air Supply, Water Reservoir

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Process Water Bypass

All SMC chillers have an internal bypass device (patent pending). If the process flow becomes blocked during chiller operation, this component allows water to flow through the chiller. This protects the chiller from freeze-up, excessive pressures, and pump damage, and allows other safety features to remain effective.

2-3 SMC Condenser Air Supply

SMC chillers use the surrounding air to cool the condenser.

;Condenser air entering the SMC unit should be at least 65°F (18°C). Operation with air below 65°F (18°C) can cause the low pressure cutout to shut down the chiller due to the low refrigerant pressure.

;Install the chiller in an area where there is free passage of air for condensing.

;Provide 18” (46 cm) or more clearance for the chiller’s air intake.

;Make provisions to exhaust the heated air discharged from the chiller.

;Do not put the SMC unit where steam, hot air or fume exhausts will be drawn into the condenser.

;Air-cooled condensers must be cleaned frequently. Neglect reduces capacity, increases operating costs, and leads to possible chiller failure. See Chapter 7 on Page 31 for cleaning instructions.

;Normal condensing pressure with 95°F (35°C) air is approximately 180 psi (1,241 kPa) for the SMC050A and SMC100A; 275 psi (1,897 kPa) for the SMC150A.

SMC Ambient Temperature Ranges

Ambient temperature range

Minimum temperature

Maximum temperature

Operation

65°F (18°C)

100°F (38°C)

Storage

40°F (4°C)

120°F (49°C)

2-4 Water Reservoir

During startup and when additional solution is required, see Figure 5 on Page 17 for the recommended ethylene glycol/water solution. This chart shows the proportions needed to provide freeze protection to 20°F/°C below the desired process setpoint.

;Add a pre-mixed solution to provide freeze protection to a temperature 20°F/°C below the normal operating temperature of the chiller.

;Use industrial quality (not automotive) ethylene glycol.

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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 Necessary Documents General InformationIntroduction Models CoveredAvailable Options Uncrating Your New ChillerIf the Shipment is Incorrect Event of Shipping DamagesIf the Shipment is Not Complete SMC100A Process Pump Curves ReturnsSMC050A Process Pump Curves SMC150A Process Pump Curves SMC Series Chiller Specifications SMC-150 25,400 16,000 12A 345Process Water Connections Chiller InstallationElectrical Connections SMC Condenser Air Supply Water ReservoirEthylene Glycol Curve Overhead Process Considerations Overhead PipingRefrigeration Circuit Sequence of OperationChilled Water Circuit Remote Start/Stop Interlock High Pressure CutoutLow Pressure Cutout 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 Microprocessor Control Setting the Process Water TemperatureSetting the Alarm Value SMC Control SP ALOptional Graphic Panel Indicator LightsSwitches SMC Series Optional Graphic PanelLubrication Routine MaintenanceCondenser Maintenance 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 5200 West Clinton Avenue 414 Fax 414 Sterling/SterlcoMilwaukee, WI
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