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Emerson DH, VH, DE, VE manual Initial START-UP Procedure, Additional Considerations for Upflow Units

Models: VE DH VH DE

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Initial Start-Up Procedure

2.0INITIAL START-UP PROCEDURE

Before beginning start-up, make certain that unit was installed according to the instructions in the Installation Manual. All exterior panels must be in place.

Locate the Start-Up form supplied with your unit documents. Complete the form during your start-up and mail it to Liebert when start-up is completed. Contact your Liebert supplier if you have any ques- tions or problems during your unit installation, start-up, or operation.

! WARNING

Potentially lethal voltages exist within this equipment during operation. Observe all cautions and warnings on the unit and in this manual. Failure to do so could result in serious injury or death. Only qualified service and maintenance personnel should work with this equipment.

1.Disconnect all power to the environmental control unit.

2.Tighten all electrical wiring connections on electric panel and at all major components such as compressors, reheats, humidifiers and motors which may have loosened during shipping.

3.Remove all line voltage fuses except the main fan fuses at the far right of the electric panel and the Control Voltage fuses at the far left of the electric panel. For units supplied with circuit breakers, open them instead of removing fuses.

4.Turn on power and check line voltage on main unit disconnect switch. Line voltage must be within 10% of nameplate voltage.

5.Turn ON main unit disconnect switch and check secondary voltage at transformer T1. Voltage at T1 must be 24 VAC ±2.5 VAC (check at TB1-1 and TB1-8). T1 voltage must not exceed 28 VAC. Change primary tap if necessary.

6.Push ON button. Blower will start and ON lamp will light (lighted switch on Standard Controls only).

7.If you do not want your unit to operate at factory default settings, set temperature and humidity setpoints and sensitivity, alarms, and other control functions. Refer to 3.0 - Advanced Microprocessor Controls Setup or to Advanced Microprocessor with Graphics Control Setup on page 18.

8.Turn OFF main unit disconnect and main breaker. Unit ON button should be OFF.

9.Replace all fuses you removed during step three (or reset circuit breakers).

10.Restore power to unit; turn ON the main unit disconnect switch.

11.Check the current draw on all line voltage components and match with serial tag.

12.Push ON button, putting the unit into operation.

13.Check for unusual noises and vibration.

14.Check all refrigerant and water lines for leaks.

15.Test all functions of your unit for proper operation.

Return completed startup form to:

Liebert Corporation

1050 Dearborn Drive P.O. Box 29186 Columbus, OH 43229

2.0.1Additional Considerations for Upflow Units

These units are manufactured with factory supplied adjustable motor sheaves. Due to variations in applications, a fixed motor pulley may be desired and can be substituted for the adjustable sheave after obtaining and confirming the desired air flow. This will reduce vibration and wear on the belts and pulleys. Consult Liebert Applications Engineering for more information.

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Emerson DH, VH, DE, VE manual Initial START-UP Procedure, Additional Considerations for Upflow Units
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VE, DH, VH, DE specifications

Emerson is a well-known brand in the field of automation solutions, offering a range of products that cater to various industries. Among its diverse portfolio, Emerson’s products like DE (Digital Electronics), VH (Variable Frequency Drives), DH (Distributed Control Systems), and VE (Valve Positioners) stand out for their advanced features, cutting-edge technologies, and unique characteristics.

Digital Electronics (DE) from Emerson represents the backbone of modern automation systems. These devices are characterized by their highly reliable digital communication capabilities, providing robust solutions for process monitoring and control. DE products integrate seamlessly with various automation platforms, allowing for easy data exchange and system interoperability. The advanced analytics embedded in these systems enable predictive maintenance strategies, enhancing overall operational efficiency.

Variable Frequency Drives (VH) are integral to motor control technologies, maximizing energy efficiency in various applications. Emerson's VH drives are designed for flexibility, supporting multiple motor types and configurations. These drives utilize pulse width modulation (PWM) technology, allowing for precise speed control and improved application performance. Their built-in protection features help extend motor life, prevent downtime, and reduce maintenance costs. Furthermore, the user-friendly interfaces of VH drives facilitate quick setup and troubleshooting.

Distributed Control Systems (DH) from Emerson provide a holistic approach to managing complex industrial processes. They enable centralized control while ensuring that local operations continue seamlessly. DH systems are characterized by their modular architecture, making them highly scalable and adaptable to changing operational needs. Advanced control algorithms within these systems help optimize processes, ensuring maximum productivity. Additionally, their enhanced cybersecurity features protect critical industrial operations from potential threats.

Emerson's Valve Positioners (VE) play a crucial role in regulating flow and pressure in various processes. These devices provide precise positioning capabilities, enhancing the performance of control valves. The VE systems incorporate smart technologies such as adaptive control and diagnostics, allowing them to self-tune and deliver accurate performance over time. Their compact design and robust build ensure they operate effectively in challenging environments.

In summary, Emerson's DE, VH, DH, and VE offerings embody the latest innovations in automation technology. Their main features, including digital communication, energy efficiency, scalability, and precision control, cater to the diverse demands of modern industries. With these products, Emerson not only enhances operational efficiency but also paves the way for intelligent automation solutions that are crucial for the future of industrial processes.