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Liebert 3000 manual Circuit Board Adjustments, Drain Tempering Feature

Models: 3000

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Component Operation and Maintenance

Figure 14 Canister replacement

Circuit Board Adjustments

! WARNING

Circuit board adjustment should be performed by qualified personnel only. Hazardous voltages are present in the equipment throughout the procedure. Use extreme caution. If desired, power may be disconnected prior to the procedure.

Humidifier operation is governed by the humidifier control board. This board is located on the right side of the humidifier compartment. There are three potentiometers mounted on the board. These pots can be used to adjust for extreme water conductivity conditions and capacity.

The “%” pot controls the amperage at which the drain will energize. The pot is clearly marked in per- centages. This adjustment is factory set at 90%, which indicates that the unit will drain when the amperage falls off to 90% of the capacity setpoint. Raising the value increases the frequency of drain cycles. Lowering the value decreases the frequency of drain cycles. The frequency should be increased for highly conductive water and decreased for less conductive water. If adjustment is necessary, and a change of three to four percent in either direction does not permit normal operation of the unit, con- sult your Liebert supplier.

The pot marked “SEC” controls the duration of the drain cycle. The pot is clearly marked in seconds. This adjustment is factory set at 60 seconds and should not be readjusted without consulting your Liebert supplier.

The pot marked “CAP ADJ” is factory set at 100%. The maximum capacity is determined by a fixed resistor (R4) which is factory selected based on unit voltage.

Drain Tempering Feature

All units are equipped with a drain tempering feature which mixes cold fill water with hot drain water to protect drain piping. This feature can lower drain water temperature to as low as 140°F (60°C), depending on water pressure. To deactivate this feature, remove the diode from socket CR18 on the circuit board (lower left, above LED).

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Liebert 3000 manual Circuit Board Adjustments, Drain Tempering Feature
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3000 specifications

The Liebert 3000 is a cutting-edge power protection solution designed to provide reliable and efficient backup power for critical applications. This uninterruptible power supply (UPS) system is engineered to safeguard sensitive electronic equipment from power disturbances, ensuring uninterrupted operations in data centers, telecommunications, and industrial environments.

One of the standout features of the Liebert 3000 is its high-efficiency design. With an efficiency rating of up to 94%, the system minimizes energy loss, resulting in lower operational costs and a reduced carbon footprint. This is particularly important in today's environmentally conscious climate, as organizations strive to meet sustainability goals while maintaining top-tier performance.

The Liebert 3000 employs advanced technologies to enhance its functionality. It incorporates online double-conversion technology, which provides a continuous supply of clean and regulated power. This technology ensures that connected loads receive stable voltage and frequency, shielding them from voltage spikes, sags, and outages. Additionally, the UPS offers features such as automatic battery testing, which helps ensure peak battery performance and reliability.

Another key characteristic of the Liebert 3000 is its modular design, allowing for flexible scalability. This means that organizations can easily expand the capacity of their UPS system as their power needs grow, without the need for extensive system overhauls. The modular architecture also facilitates simplified maintenance and reduces downtime, as individual modules can be serviced without interrupting power to the critical load.

The system is equipped with comprehensive monitoring and management capabilities. The Liebert 3000 provides real-time data on power usage, battery status, and system performance, enabling facility managers to make informed decisions and proactively address potential issues. The integration of remote management tools allows for seamless monitoring from anywhere, providing peace of mind for operators.

Overall, the Liebert 3000 combines high efficiency, advanced technology, and flexible design to deliver a robust power protection solution. Its reliability and performance make it a preferred choice for organizations seeking to protect their critical infrastructure while enhancing operational efficiency and sustainability. As businesses continue to rely on technology for their everyday operations, the Liebert 3000 stands out as a dependable safeguard against the uncertainties of power quality.