Liebert VM12000 Manual Restart after Manual Off, On Battery, Battery Recharge, Auto-Bypass

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Bypass
Switch

System Start-Up

Manual Restart after Manual Off

If Manual Restart has been selected (rather than Auto- Restart) and someone has turned the unit off, the Output Circuit Breaker will probably be closed. Just press the ON button to turn on the UPS inverter.

Auto-Restart

The factory enables this feature. The UPS automatically restarts and supplies power to the load after battery depletion. The UPS supplies power to the load as soon as utility service is restored.

Turning the UPS OFF disables Auto-Restart until the ON button is pressed.

Manual Restart after Low Battery Shutdown or REPO Manual Restart (instead of Auto-Restart) opens the Output Circuit Breaker upon battery depletion during a power outage. Pressing the customer-supplied REPO switch also opens the Output Circuit Breaker. To manually restart the UPS, close the Output Circuit Breaker (turn it OFF, then ON to reset breaker). When the ”Press ON to start system...” message appears, press the ON button.

Normal Operation

When the utility power is available and within acceptable limits, the unit supplies filtered and regulated power to the load through the inverter. The battery charger maintains a charge on the battery.

During normal operation, the LCD display informs you of UPS status. The display indicates when the UPS transfers the load to or from bypass (if available), when the load is On Battery, and when alarms or faults occur.

See the alarm chart in the Appendix for alarm message meanings and corrective actions.

Battery Operation

On Battery

During low input voltage, the battery supplements inverter power. During a utility power failure, the battery provides all power required for normal operation. A fully charged battery provides at least 10 minutes of output power. More battery power is available if your system includes an optional external battery cabinet (see Options). Less load increases the battery back- up time. If your UPS supports several computer systems, turning some of them off allows others to run longer. Battery Run Time curves in the Appendix show performance of the internal battery and external battery cabinets.

NOTE: If utility power remains off, perform an orderly shutdown of the critical load before exhausting the battery. If utility power returns during battery operation, normal operation resumes and battery recharging begins.

Battery Recharge

Upon return of acceptable utility power after battery operation, the battery charger begins to charge the batteries. Battery charging stops upon pressing the OFF button four times or activating the REPO.

The battery charger compensates for battery temperature. In addition, the charger has two recharge rates, user- selectable through the LCD display. The ”turbo” rate recharges batteries to 95% capacity within 10 times the discharge duration. The ”standard” rate recharges batteries to 95% capacity within 20 times the discharge duration. Select the ”standard” factory default setting rate if your utility system has frequent (weekly) blackouts.

With ”turbo” mode enabled, the microprocessor determines how often to use the fast recharge rate, in order to optimize battery life.

Bypass Operation

The bypass provides an alternate path for power to the critical load. On bypass, utility power feeds directly to the load.

Auto-Bypass

Upon overload or inverter

failure, the UPS automatically transfers to

(and from) bypass. During an overload, the

UPS attempts to retransfer from bypass to the inverter up to 15 times within a 20-minute period. If the overload prohibits

retransfer after 20 minutes, the unit remains on bypass.

Manual Bypass

Manually select the bypass power to the critical load by operating

the bypass switch on the back of the unit. When

activated, the unit immediately transfers to bypass and turns OFF the inverter, PFC, and battery charger. The UPS remains in bypass until the switch is moved to the UPS position. The user may also initiate manual bypass via the LCD display or RS-232 remote communications.

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Contents UPStation S Page Page Remote Emergency Power Off Repo Cable Liebert UPStation S Site Planning Data Optional System Components IntroductionUnloading the UPS Installation OutputKVA Start-up Checklist UPS accepts two-phase or three-phase power 18kVA Single Line Diagram KVA Start-Up ChecklistControl Buttons OperationControl / Display Panel LCD DisplayTable #2 Factory Default Settings Configuration Setting Default ValueDisabled See OptionsLCD Menu Tree Manual Restart after Manual Off On BatteryBattery Recharge Auto-BypassRemote Emergency Power Off Manual OffDistribution Configurable Distribution CD OptionsStandard Load Module Receptacle Voltage Circuit Configuration BreakerHardwire Load Module Load ModulesApproximate Weights in Pounds Model Number 125 175 Maintenance Bypass 8 18kVAWeights/Dimensions On-Line Standard FeaturesMaintenance TestInstallation MountingKVA UPS Connections KVA Maintenance Bypass Connections Operation Initial System Start-upTroubleshooting Transfer to Maintenance Bypass from On-LineTransfer to Test from Maintenance Bypass Transfer to On-Line from Test∙ Programming ∙ Review ∙ Override ∙ Load Labels Select a Time DelayGetting Started Select a Load Module∙ Turn OFF load ∙ Turn on load ∙ Warning Delays Power Management Programming Elements∙ Utility Failed ∙ Utility Restored LoadsStep #1B Define Parameters Start ClosureStep #1A Step #1CSiteNet 2 Power Surveillance SiteNet 1 Shutdown Interface KitsRS-232 with User-Configurable Relays VCR232C CablesVBS061 / VBS062 6 kVA Standard External Battery CabinetsVBD061 3.5-6 kVA VBD121 8 12 kVARoutine Maintenance NEC Wire Gauge Chart AppendixMins 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 UPStation S Company Behind The Products

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.
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