The Vertiv Liebert AHU is a precision air conditioning unit designed for data centers and other IT environments requiring optimal environmental control, high reliability, and energy efficiency. It is engineered to manage large heat loads and air volumes, addressing the increasing power densities and data consumption in modern IT infrastructure.
Function Description:
The Liebert AHU serves as a comprehensive thermal management solution, maintaining precise temperature and humidity levels within technological ecosystems. It integrates advanced cooling, airflow management, and control technologies to ensure the stable and reliable operation of critical IT equipment. The unit is designed for high scalability, supporting rapid growth in dynamic and virtualized environments.
Important Technical Specifications:
The AHU series models are fully defined by a 25-digit nomenclature, indicating various configurations and features. Key technical parameters include:
- Air Volume: Models like FA065HC1NE09020F1070P0000 and FA065HC1NE09020M1070P0000 offer an air volume of 65 x 1000 CMH (65,000 m³/h).
- Air Discharge: Available in both horizontal and vertical airflow configurations.
- System Type: Options include Chilled Water (CW), CW+Free Cooling, and DX+ Free Cooling.
- Airflow: Utilizes EC Fans with either plastic or metal impellers, and PFC Fans (THDi <5%).
- Power Supply: Typically 380-415 V/3 ph/50,60 Hz+N or 380-415 V/3 ph/50,60 Hz without N.
- Cooling System: Features CW EPIV, CW Two-way valves, CW EV, and CW PICV options.
- Humidification: Available with or without a humidifier.
- Display: Equipped with a Global HMI 9-inch color touchscreen display.
- Re-Heating: Options for electric heating (Std 1 stage or Opt. 2 stage).
- Filtration: Standard G4 filters, with options for F6. MERV8 plate air filters are standard, with MERV11 filters available for higher filtration levels.
- Special Power Option: Includes Power meter and UPS options, with controller backup via Ultracap.
- Enclosure Options: Available with aluminum profile and foaming board or sheet metal.
- Mains Switch High Voltage Option: ATS C1000 and ATS C300.
- Installation Option: Includes vibration isolators (PAD type) & seismic restraint bracket.
- Monitoring: Integrated Unity card.
- Sensors: Options for Smoke Sensor, Supply air pressure differential sensor, Remote air temperature sensor, Airflow meter, and Multi Sensors.
- Packaging: Standard Wooden Pallet and EPE package.
- Performance Parameters (for FA065HC1NE09020F1070P0000 / FA065HC1NE09020M1070P0000):
- Return Air T&H: 36 °C/26%
- Supply Air T&H: 22 °C/60%
- Chilled Water Temp (°C): 15/22
- Water Flow (L/s): 10.8
- Water PD (kPa): 60
- Cooling Capacity (kW): 300
- Sensible Cooling Capacity (kW): 300
- Air Flow (m³/h): 65000
- Fan Quantity: 4
- ESP (Pa): 100
- Power (kW): 13
- Coil Type: Copper Tube & Aluminum Fin (Tube 15.88 mm×0.4 mm Cu/Epoxy Aluminum Fin 0.145 mm, 4 rows, 14 fins per inch).
- Filter Grade: G4 (Dimensions: 725 x 460 x 96 mm, Quantity: 16).
- Water Valve: Belimo EPO80F+MP, EPIV type.
- Product Dimensions (FA065HC):
- Net Dimensions (W×D×H): 2800 x 1600 x 3600 mm
- Upper Section: 2800 x 1600 x 1740 mm (Net Weight: 1100 kg, Gross Weight: 1400 kg)
- Lower Section: 2800 x 1600 x 1860 mm (Net Weight: 1300 kg, Gross Weight: 1400 kg)
- Operating Environment Requirements:
- Indoor temperature: 18 °C ~ 40 °C
- Chilled water pressure: max. 16 bar
- Protection level: IP20
- Altitude: <1000 m (derating required above 1000 m)
- Operation voltage range: 380-415 V, 3 Ph + N~50/60 Hz
- Storage Environment Requirements:
- Clean room (no dust)
- Environment humidity: Less than 95% RH (30 °C)
- Ambient temperature: -25 °C to +55 °C
- Storage time: Not to exceed six months without re-calibration.
Usage Features:
- iCOM Controller: The unit is equipped with an iCOM Controller featuring an easy-to-use interface and "auto-restore on power-failure" capability. It can store up to 400 records and connects directly to the facility network (Ethernet) for synchronous communication with multiple AHU units, enhancing reliability and centralized monitoring.
- 9-inch Color Display: A standard 9-inch multi-color 800×480 dot-matrix liquid crystal touchscreen with white backlight simplifies operation and visualizes unit status.
- Dual Power Supply- ATS: Automatic Transfer Switch (ATS) detects and switches between two power sources, ensuring continuous operation and providing power alarm signals.
- Sensors:
- Supply Air Temperature Sensor: Monitors and allows setting of supply air temperature, triggering alarms if set values are exceeded.
- Return Air Temperature & Humidity Sensor: Detects return air temperature and humidity, with user-definable setpoints and alarm triggers.
- Supply Air Pressure Sensor: Detects pressure difference to control fan speed.
- Airflow Meter: Calculates real-time airflow based on pressure difference.
- Power Meter: Detects electrical parameters like power, frequency, voltage, and current.
- Smoke Detector: Active smoke detection system designed for data center airflow environments, triggering alarms at the first sign of smoke.
- EC Fans: Energy-efficient fans with integrated electronics, providing cost-effective airflow regulation and reduced input power.
- EPIV (Electronic Pressure Independent Valve): Accurately controls water flow, maintaining stability even with fluctuating water pressure.
- PICV (Pressure Independent Control Valve): Mechanical alternative to EPIV, ensuring constant water flow independent of pressure fluctuations.
- Air Damper: Motorized air damper with digital value control for reliable operation.
- Ultracap: Provides 120 seconds of power to the controller and display during mains voltage failure, preventing data loss and long restart cycles.
- User Interface: Password-protected user and service menus prevent unauthorized changes. The touchscreen is backlit and auto-dims for energy saving.
- Status Dial: Circular display on the main screen shows setpoints and environmental conditions, with background colors indicating unit status (e.g., green for normal, red for alarm).
- Teamwork Modes: Supports various teamwork configurations (No teamwork, Parallel Teamwork, Independent Teamwork, Optimized Aisle Teamwork) for synchronized operation of multiple units.
- Context-Sensitive Help: Provides on-screen information about panels and dialogs.
- Search Function: Allows users to find settings, service codes, or parameters quickly.
Maintenance Features:
- Easy Installation: The unit is delivered in two sections (upper and lower cabinets) for easier handling and installation. Lifting tooling is required for hoisting the upper cabinet.
- Maintenance Space: A minimum of 1.1 m maintenance space is required at the rear of the equipment for servicing and repairs.
- Filter Replacement: Features MERV8 plate air filters (or optional MERV11) with large dust capacity, large airflow, small resistance, and easy installation.
- Belt Type Leak Detector: Placed in low-lying areas to detect water leakage, covering a larger range than standard leak detection plates.
- iCOM Controller Logging: Stores up to 400 records, aiding in proactive maintenance and troubleshooting by providing insights into trends and unit functioning.
- Event Log: Records the last 400 events by date/time, with color-coded status indicators for easy identification of warnings and alarms.
- Alarm Management: Allows viewing, silencing, and acknowledging alarms. Unacknowledged alarms remain active until the triggering condition is resolved.
- Run Hours Management: Users can view and reset run hours for components, and set total run-time limits.
- Modular Design: Components like EC Fans and coils are designed for efficiency and ease of maintenance. The coil has a hydrophilic coating to minimize water resistance and improve efficiency.
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