Operation

The Motor Amps Load Limit protects the com- pressor from overloading by decreasing the compressor capacity if the motor amperage is at the Maximum Amps setpoint, or preventing an increase in capacity if the motor amperage is above the Full Load Amps setpoint. ( See manual for the appropriate microprocessor.)

3. Oil Separator Heater

The oil separator heater keeps the oil in the separator from becoming too viscous and helps keep gas from condensing in the receiver section of the separator.

The heater is turned on only when the compres- sor is off. The separator heater is supplied with an integral temperature control.

B. Safety Setpoints

A detailed explanation of all safety setpoints can be found in the Compact Logix PLC manual, p/n 35391CL.

1. Oil Pressure

Low oil pressure differential stops the compressor unit when there is an insufficient difference in pres- sure between the oil manifold and suction.

2. Discharge Pressure

High discharge pressure cutout stops the compres- sor unit, when the discharge pressure in the oil separator exceeds the setpoint.

 

TABLE 1.

VSS / VSR / VSM COMMAND SHAFT ROTATION AND TRAVEL

 

 

 

 

 

 

 

 

 

 

 

COMMAND SHAFT ROTATION

NO. OF TURNS / ROTATION ANGLE / SLIDE TRAVEL

COMP.

CAPACITY

VOLUME

CAPACITY

 

VOLUME

MODEL

INC

 

DEC

INC

 

DEC

TURNS/ANGLE/TRAVEL

TURNS/ANGLE/TRAVEL

 

 

VSS 291

CW

 

CCW

CW

 

CCW

0.91 /

328

/ 3.568”

0.52

/

187

/ 2.045”

VSS 341

CW

 

CCW

CW

 

CCW

0.91 /

328

/ 3.568”

0.52

/

187

/ 2.045”

VSS 451

CW

 

CCW

CW

 

CCW

0.91 /

328

/ 3.568”

0.52

/

187

/ 2.045”

VSS 601

CW

 

CCW

CW

 

CCW

0.91 /

328

/ 3.568”

0.52

/

187

/ 2.045”

VSS 751

CCW

 

CW

CCW

 

CW

1.09 /

392

/ 4.283”

0.63

/

227

/ 2.473”

VSS 901

CCW

 

CW

CCW

 

CW

1.09 /

392

/ 4.283”

0.63

/

227

/ 2.473”

VSS 791

CCW

 

CW

CCW

 

CW

1.22 /

439

/ 4.777”

0.74

/

266

/ 2.889”

VSS 891

CCW

 

CW

CCW

 

CW

1.22 /

439

/ 4.777”

0.74

/

266

/ 2.889”

VSS 1051

CCW

 

CW

CCW

 

CW

1.22 /

439

/ 4.777”

0.74

/

266

/ 2.889”

VSS 1201

CCW

 

CW

CCW

 

CW

1.22 /

439

/ 4.777”

0.74

/

266

/ 2.889”

VSS 1301

CCW

 

CW

CCW

 

CW

1.22 /

439

/ 4.777”

0.74

/

266

/ 2.889”

VSS 1501

CCW

 

CW

CCW

 

CW

1.36 /

490

/ 5.325”

0.82

/

295

/ 3.200”

VSS 1801

CCW

 

CW

CCW

 

CW

1.36 /

490

/ 5.325”

0.82

/

295

/ 3.200”

VSM 71

CW

 

CCW

CW

 

CCW

0.80 /

288

/ 3.141”

0.45

/

162

/ 1.767”

VSM 91

CW

 

CCW

CW

 

CCW

0.80 /

288

/ 3.141”

0.45

/

162

/ 1.767”

VSM 101

CW

 

CCW

CW

 

CCW

0.80 /

288

/ 3.141”

0.45

/

162

/ 1.767”

VSM 151

CW

 

CCW

CW

 

CCW

0.80 /

288

/ 3.141”

0.45

/

162

/ 1.767”

VSM 181

CW

 

CCW

CW

 

CCW

0.80 /

288

/ 3.141”

0.45

/

162

/ 1.767”

VSM 201

CW

 

CCW

CW

 

CCW

0.80 /

288

/ 3.141”

0.45

/

162

/ 1.767”

VSM 301

CW

 

CCW

CW

 

CCW

0.80 /

288

/ 3.141”

0.45

/

162

/ 1.767”

VSM 361

CW

 

CCW

CW

 

CCW

0.80 /

288

/ 3.141”

0.45

/

162

/ 1.767”

VSM 401

CW

 

CCW

CW

 

CCW

0.80 /

288

/ 3.141”

0.45

/

162

/ 1.767”

VSM 501

CCW

 

CW

CCW

 

CW

0.91 /

328

/ 3.568”

0.52

/

187

/ 2.045”

VSM 601

CCW

 

CW

CCW

 

CW

0.91 /

328

/ 3.568”

0.52

/

187

/ 2.045”

VSM 701

CCW

 

CW

CCW

 

CW

0.91 /

328

/ 3.568”

0.52

/

187

/ 2.045”

NOTE: These refer to the old style gear motors and DO NOT apply to the new optical motors.Rotation for the optical motors is the OPPOSITE of what is shown in the chart.

50

Page 50
Image 50
Emerson VSS, VSR, VSM service manual Ccw

VSS, VSM, VSR specifications

Emerson VSM, VSR, and VSS are advanced technologies designed for process automation and control, often utilized in industrial applications. These systems are part of Emerson's broader portfolio of solutions aimed at enhancing operational efficiency, safety, and reliability.

The Emerson VSM, or Valve Signature Management, focuses on the digital management of valves within a system. One of its main features includes advanced diagnostics that monitor the health and performance of control valves. This technology allows for predictive maintenance, ensuring that valves operate at peak efficiency and reducing the risk of unexpected failures. The VSM utilizes a combination of smart sensors and actuators to gather data, enabling real-time analytics that can enhance decision-making and operational strategies.

On the other hand, VSR, or Valve Status Reporting, enhances visibility into the operational state of valves in real time. This system provides operators with critical updates and alerts related to valve conditions, significantly reducing response times to potential issues. The VSR technology integrates seamlessly with existing control systems, allowing for easier implementation and minimal disruption to ongoing operations. The reporting capabilities feature user-friendly dashboards that present complex data in a straightforward manner, empowering operators to make informed decisions quickly.

The Emerson VSS, or Valve Service Solutions, complements the VSM and VSR by focusing on the maintenance and support of valve systems. This offering includes comprehensive service packages that range from routine maintenance to advanced troubleshooting and repair. The VSS is designed to improve the lifespan of valves through proactive service, ensuring reliability and minimal downtime. Emerson’s trained technicians leverage predictive analytics derived from VSM and VSR data, allowing for timely intervention before issues escalate.

In summary, Emerson’s VSM, VSR, and VSS technologies work together to create a robust ecosystem for valve management in industrial settings. The combination of advanced diagnostics, real-time reporting, and comprehensive service solutions provides operators with a powerful toolkit aimed at optimizing performance and ensuring operational reliability. With these technologies, companies can embrace digital transformation, reduce operational risks, and improve overall process efficiency, leading to a safer and more productive environment. Each component plays a crucial role in empowering industries to meet the challenges of modern automation and maintain competitive advantages in their respective markets.