Emerson 2 user manual Economizer Cooling Optional, Heating Optional, Enthalpy Sensor, Actuator

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Operation

5.2Economizer Cooling - Optional

The Economizer mode uses outside air to cool the room when the outside air temperature is cool enough to allow for economical cooling. Components include the damper, spring return direct drive actuator, enthalpy sensor and actuator control board with an integral mixed air sensor. Economizer operation is enabled when the outside conditions meet required temperature and humidity as set on the enthalpy sensor. If outdoor conditions are favorable on a call for cooling, the damper actuator will open the Economizer damper. The damper position will be controlled based on the mixed air tempera- ture in the evaporator section. The factory set mixed air temperature target is 50-56°F (10-13°C).

The amount of damper opening depends on the cooling capacity of the outside air; the cooler the out- side air, the less that is needed to cool the room, and so a smaller damper opening is required. As the outside air temperature rises, the damper will open wider since more of that air is required to keep the room at the same temperature.

The Economizer and compressorized cooling will never operate at the same time. If outdoor conditions meet the required enthalpy sensor setpoint during a cooling cycle, the unit will automatically shut down the compressor and begin using outside air.

5.2.1Enthalpy Sensor

The enthalpy sensor responds to the total heat content of the outdoor air to provide changeover from compressorized cooling to free-cooling operation. The changeover point is factory set (at the “D” posi- tion). This setting will ensure rated capacity when the outdoor conditions allow for Economizer cooling.

Figure 5 Enthalpy control setting

 

70

 

 

 

 

 

 

 

 

 

65

 

 

 

 

 

 

 

 

(DB°F)

60

 

 

 

 

 

 

 

 

 

 

Enthalpy Control

 

 

 

 

 

55

 

Operating Range

 

 

 

 

 

Temperature

50

 

 

 

 

 

 

 

 

45

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

10

20

30

40

50

60

70

80

90

Outdoor Relative Humidity (%RH)

5.2.2Actuator

The Economizer actuator is mounted in the lower part of the Economizer section below the electric box. It is accessible by opening the lower front panel. The actuator is a 24 VAC, spring return device that will fully close the Economizer damper. The actuator has internal controls that allow it to oper- ate based on signals from the enthalpy control and mixed air sensor.

5.3Heating - Optional

On units supplied with optional resistance heating, a call for heating closes the heat relay and ener- gizes the evaporator fan and resistive elements.

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Contents Liebert InteleCool2 Page Table of Contents Specifications Troubleshooting Maintenance Inspection Checklist PartsFigures ET 0 36 H R P F B T Standard Features GeneralOptional Features Accessories Ancillary ComponentsRoom Preparation Unit InstallationPreparation Location ConsiderationsMounting dimensional data See below for keys to dimensionsPiping Connections Electrical Connections Power ConnectionsDucting Control ConnectionsLiebert Thermostat Tele2Outside Air Damper Optional InstallationAdjustment Economizer OptionalChecklist for Complete Installation START-UP Procedure Compressorized Cooling Refrigeration systemEnthalpy Sensor Economizer Cooling OptionalHeating Optional ActuatorHigh Pressure Standard Remote Control InterfaceUnit Controls Refrigeration Control OptionsPack1 package Anti-Short Cycle Timer StandardCommon Alarm Optional Pack2 packageHeat FiltersBlower Package Refrigeration SystemAir-Cooled Condenser CompressorThermostatic Expansion Valve Mechanical FailureCompressor Replacement Electrical FailurePressure information Design Minimum MaximumPsig kPa Psig kPA Dimensional Data InteleCool2 dimensional data in. mmTechnical Data Technical data, 60 HzCFM m 3/hr 490 22280F DB/19.4C 67F WB indoor ambient kW Btuh Outdoor ambient M3/hr CFMTechnical data, 50 Hz Ambient kW BtuhHr CFM Heater Capacity kW Nominal Heater Rating Ton Optional heater capacity, 60 HzOptional heater capacity, 50 Hz 10 kWKW Heat No Heat Circ1 Circ2 Model Volts Phase Electrical data, 60 Hz ampsElectrical data, 50 Hz amps Troubleshooting guide Problem Probable Cause RemedyFan Section Liebert InteleCool2Monthly Filters Semiannually Compressor SectionParts Refrigeration system parts, 1.5 and 2 ton unitsRefrigeration system parts, 3 ton units Refrigeration system parts, 4-ton units Refrigeration system parts, 5-ton units Electric panel, 1.5- and 2-ton units 11-10Electric panel parts, 3-ton units Electric panel parts, 4-ton unit Electric panel parts, 5-ton unit Motor parts, heater, Economizer, 1.5- and 2-ton units High ambient optionMotor parts, heater, Economizer, 3-ton units Motor parts, heater, Economizer, 4-ton units Motor parts, heater, Economizer, 5-ton units Condenser/piping assembly Crankcase heater reciprocating compressor onlyEvaporator blower Evaporator coil and expansion valveElectric panels Heater assembly Economizer assembly Soft start device To compressor capacitorParts Parts Page Ti n Ne tIti That

2 specifications

Emerson 2 is an advanced automation and control technologies platform designed to enhance operational efficiencies across various industries. This next-generation system builds upon its predecessor, incorporating cutting-edge technologies that facilitate seamless integration and data-driven decision-making.

One of the main features of Emerson 2 is its robust IIoT (Industrial Internet of Things) capabilities. These features allow for real-time data collection and monitoring, which empower users to gain insights into their processes. By leveraging smart sensors and devices, Emerson 2 ensures that vital information is captured and communicated effectively, leading to improved process optimization and reduced downtime.

Emerson 2 also offers enhanced analytics tools, enabling organizations to analyze large volumes of data efficiently. Users can utilize advanced algorithms and machine learning models to identify patterns, predict equipment failures, and optimize maintenance schedules. This predictive maintenance capability is critical for minimizing operational disruptions and maximizing asset life.

The platform is designed with user experience in mind, featuring an intuitive interface that simplifies navigation and enhances usability. Operators can easily access real-time dashboards and visualizations, allowing them to make informed decisions rapidly. Customizable reporting tools further enhance user interaction, enabling teams to generate reports that meet their specific operational needs.

Security is a top priority for Emerson 2, which incorporates advanced cybersecurity measures to protect sensitive data. With built-in encryption protocols and secure communication standards, Emerson 2 ensures that information is safeguarded against potential threats and cyberattacks.

Another noteworthy characteristic of Emerson 2 is its scalability. The platform is designed to grow with businesses, allowing for the integration of additional sensors, devices, and modules as operational demands evolve. This flexibility means that companies can adapt their automation strategies without overhauling their entire system.

Finally, Emerson 2 supports various industry standards and protocols, facilitating interoperability with existing systems and equipment. This feature enables a smoother transition for businesses looking to upgrade their automation capabilities without extensive overhauls.

In summary, Emerson 2 represents a significant leap in automation technology, featuring IIoT integration, advanced analytics, user-friendly interfaces, robust security, scalability, and interoperability. As industries seek smarter and more efficient solutions, Emerson 2 stands out as a versatile platform equipped to meet the challenges of modern manufacturing and process control.