Installation

After the system is leak-free and evacuation has been completed, it is ready for charging. Before actual charging, however, the entire operation of the refrigeration system should be inspected as outlined below:

A.Low Side Equipment

1.Fans on air handling equipment running.

2.Pumps on water cooling equipment run- ning.

3.Proper location and attachment of thermo- static expansion valve bulb to suction line.

4.Correct fan and pump rotation.

5.Evaporator pressure regulators and solenoid valves open.

6.Water pumps and motors correctly aligned.

7.Belt drives correctly aligned and tensioned.

8.Proper voltage to motors.

B.Compressors

1.Proper oil level.

2.Voltage agrees with motor characteristics.

3.Properly sized motor fuses and heaters.

4.Direct drivers aligned and couplings tight.

5.All suction and discharge valves open.

6.All transducers and RTD’s calibrated and reading correctly.

C.Condensers

1.Water available at water cooled condensers and supply line valve open.

2.Water in receiver of evaporative condenser and makeup water available.

3.Correct rotation of pump and fan motors.

4.Belt drives aligned and tensioned correctly.

5.Pump, fans and motors lubricated.

D.Controls

Controls should be at the initial set points. See microprocessor manual for further information.

E.Initial Charging – High Side Charging

There are two methods of charging refriger- ant into the system, through the “high side” or through the “low side”. High side charging is usually used for initial charging as filling of the

system is much faster. Low side charging is usually reserved for adding only small amounts of refrigerant after the system is in operation.

High side charging of refrigerant into the system is accomplished as follows:

1.Connect a full drum of refrigerant to the liquid charging valve. This valve is gener- ally located in the liquid line immediately after the king or liquid line valve. Purge the air from the charging line.

2.Invert the refrigerant drum if the drum is not equipped with “Liquid” and “Vapor” valves, and place in such a position so the liquid refrigerant only can enter the sys- tem. Close the liquid line or king valve, if it is not already closed. Open the “Liquid” charging valve slowly to allow refrigerant to enter the system. The vacuum in the system will draw in the refrigerant.

It is important that, during this operation, air handling units be running and water is circulating through the chillers. The low pressures on the system can cause the refrigerant to boil at low temperature and possibly freeze the water if it is not kept circulating.

Water freezing in a chiller can rupture the tubes and cause extensive damage to the system. It would be desirable to charge the initial amount of refrigerant without water in the shell and tube equipment to eliminate the possibility of freeze up.

3.After some refrigerant has entered the system, the compressor unit starting pro- cedure may be followed. See Start-Up and Operation Section of this manual.

4.Continue charging refrigerant into the system until the proper operating require- ments are satisfied. Then, close the liquid charging connection and open the liquid line valve allowing the system to operate normally. To check that enough refriger- ant has been added, the liquid sight glass

28

Page 27 Page 29
Page 28
Image 28
Emerson VSM, VSR, VSS service manual Installation
Page 27 Page 29

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.
Top Page Image Contents