Liebert VM18000, VM12000 user manual Test, Maintenance

Page 19

Test

When the rotary switch is placed in the Test position, contacts A and B are closed and C is open. The power for the load is now coming from the maintenance bypass source, as illustrated in below. The connection from the output of the UPS is open. Input power to the UPS is still available for testing and troubleshooting purposes.

UTILITY

FEED

MAINTENANCE BYPASS

 

 

CRITICAL

 

B

LOAD

 

 

A

 

C

 

 

BYPASS

PFC

INVERTER

BYPASS

BATTERIES

Maintenance

UPStation S™

When the rotary switch is placed in the Maintenance position, contacts A and C are open and B is closed. The power for the load is coming from the maintenance bypass source, as illustrated below. The UPS is now completely isolated from the source as well as the critical load.

 

MAINTENANCE BYPASS

 

UTILITY

 

CRITICAL

FEED

B

LOAD

 

 

A

 

C

BYPASS

PFC

BATTERIES

INVERTER

BYPASS

UPStation S™

19

Image 19
Contents UPStation S Page Page Remote Emergency Power Off Repo Cable Liebert UPStation S Site Planning Data Unloading the UPS IntroductionOptional System Components Output InstallationKVA Start-up Checklist UPS accepts two-phase or three-phase power KVA Start-Up Checklist 18kVA Single Line DiagramLCD Display OperationControl / Display Panel Control ButtonsSee Options Configuration Setting Default ValueDisabled Table #2 Factory Default SettingsLCD Menu Tree Auto-Bypass On BatteryBattery Recharge Manual Restart after Manual OffManual Off Remote Emergency Power OffOptions Distribution Configurable Distribution CDLoad Modules Receptacle Voltage Circuit Configuration BreakerHardwire Load Module Standard Load ModuleOn-Line Standard Features Maintenance Bypass 8 18kVAWeights/Dimensions Approximate Weights in Pounds Model Number 125 175Test MaintenanceMounting InstallationKVA UPS Connections KVA Maintenance Bypass Connections Initial System Start-up OperationTransfer to On-Line from Test Transfer to Maintenance Bypass from On-LineTransfer to Test from Maintenance Bypass TroubleshootingSelect a Load Module Select a Time DelayGetting Started ∙ Programming ∙ Review ∙ Override ∙ Load LabelsLoads Power Management Programming Elements∙ Utility Failed ∙ Utility Restored ∙ Turn OFF load ∙ Turn on load ∙ Warning DelaysStep #1C Define Parameters Start ClosureStep #1A Step #1BSiteNet 1 Shutdown Interface Kits SiteNet 2 Power SurveillanceCables RS-232 with User-Configurable Relays VCR232CVBD121 8 12 kVA Standard External Battery CabinetsVBD061 3.5-6 kVA VBS061 / VBS062 6 kVARoutine Maintenance Appendix NEC Wire Gauge ChartMins UPStation S 6 kVA Battery Run Times #1 UPStation S 10 kVA Battery Run Times #1 UPStation S 18 kVA Battery Run Times #1 Alarm Messages, Meanings, and Corrective Actions Company Behind The Products UPStation S

VM18000, VM12000 specifications

The Liebert VM12000 and VM18000 are advanced precision cooling systems designed to provide reliable temperature and humidity control in critical environments such as data centers, telecommunications facilities, and industrial applications. These systems are engineered to meet the diverse needs of modern infrastructures that demand optimal performance, energy efficiency, and robust reliability.

One of the key features of the Liebert VM series is its high cooling capacity. The VM12000 offers a cooling capacity of 12,000 BTU/h, while the VM18000 provides an impressive 18,000 BTU/h. This makes both models ideal for environments where heat load is significant, ensuring that critical equipment remains within operational limits. The systems employ variable speed technology, allowing them to dynamically adjust cooling output based on real-time conditions, which enhances energy efficiency and performance.

The Liebert VM series is equipped with advanced control systems, including microprocessor controls that enable precise monitoring and adjustments. Users can easily access real-time data through intuitive interfaces, allowing for seamless management of cooling settings. Additionally, the systems can be integrated into building management systems (BMS), offering centralized control that enhances operational efficiency.

Another notable characteristic of the VM series is its modular design. This allows for easy scalability, making it suitable for both small setups and large, complex installations. The flexibility offered by the modular design permits the addition of cooling units as cooling demands grow, ensuring that users can keep pace with their evolving requirements.

In terms of energy efficiency, the Liebert VM12000 and VM18000 meet and exceed the efficiency standards set by the industry. The systems utilize R-410A refrigerant, which is environmentally friendly and contributes to higher energy performance. This focus on sustainability not only reduces the carbon footprint but also lowers operating costs, providing significant savings over time.

Furthermore, the Liebert VM series is built with robust components designed for durability and longevity. The systems are engineered for high performance in demanding conditions, ensuring reliability even in the most challenging environments.

Overall, the Liebert VM12000 and VM18000 precision cooling units stand out for their high capacity, energy efficiency, advanced controls, and modularity. These features make them a top choice for businesses needing reliable cooling solutions to protect their critical infrastructure while also promoting energy sustainability.