CRAH
Delivering the World's Most Energy Efficient and Sustainable Thermal Management Solutions
The Air2O range of CRAH units designed specifically for the Hyperscale Data Center and Mission Critical Industries are designed to maximize cooling output whilst minimizing footprint. Designed with ease of maintenance in mind our standard product ranges encompasses a wide range of highly efficient and reliable units from 63kw to 441kw. These units are available with upflow or downflow air distribution with chilled water, Water (Glycol) and ewe cooled options. Air2O’s unique and integral controls and monitoring system provides precise control of temperature and humidity, sequence control of EC fans to maximize energy savings , multiple 10 for all major components to optimize energy savings and control. BMS/Modbus interface for remote monitoring, network control capability. For larger or out of the box requirements Air2O have a full custom build ability to produce solutions of limitless size and we have the expertise and experience to design and produce the most practical and efficient cooling solution for your project.
Chilled Water Computer Room Air Handler for Data Centers
The Air2O CRAH is a chilled water computer room air handler, engineered to the project mechanical schedule and built to order in Phoenix, Arizona. Ten reference models cover 20 to 560 kW of nominal gross sensible cooling and 2,500 to 70,000 CFM, with direct-drive EC fans and a choice of two cooling coils for entering water from 40°F to 65°F.
20 to 560 kW Nominal Cooling
Ten reference models deliver 20 to 560 kW of nominal gross sensible cooling, or 79.1 kW (22.5 tons) per 10,000 CFM at a 25°F air-side rise. Send the schedule, and Air2O returns a design datasheet that confirms capacity at the scheduled airflow, air-side rise, and entering water temperature.
- 20 to 560 kW nominal gross sensible cooling
- 2,500 to 70,000 CFM airflow
- Ten reference models, CRAH 020 to CRAH 560
- Cooling coil certified to AHRI Standard 410
Basis: Nominal rating at a 25°F air-side rise and 0.25 in. w.g. external static pressure, at standard air density. The Standard coil is rated at 85°F entering air and 45°F entering water, and the Warm Water coil at 95°F entering air and 60°F entering water. Gross sensible capacity is the sensible cooling at the coil, with no deduction for fan heat. The cooling coil is certified to AHRI Standard 410 by the coil manufacturer within that standard's rating conditions, and the certification does not extend to the assembled unit.
Warm Water Coil, 50°F to 65°F
Each unit has one of two coils: Standard for 40°F to 50°F entering water or Warm Water for 50°F to 65°F. The Warm Water coil carries about 1.5 times the surface per kW, operates dry at its 60°F rating point, and gives the plant more water-side economizer hours.
- Standard coil for 40°F to 50°F water
- Warm Water coil for 50°F to 65°F water
- More water-side economizer hours at the plant
- 0.33 W/CFM fan power, FEI 1.59 at rating
Basis: Coil surface compared with the Standard coil. The Warm Water coil is rated at 95°F and 30% RH entering air and 60°F entering water, where it operates dry, and the Standard coil, rated at 85°F and 36% RH, operates wet and carries a latent load. Fan power and Fan Energy Index (FEI, AMCA Standard 208) at the nominal rating point, with 1.75 in. w.g. fan static pressure.
Downflow, Upflow, or Front Discharge
Units are factory configured for downflow into a raised floor plenum, upflow for slab floor rooms, or front discharge from a gallery through the wall. Where the schedule calls for a capacity or cabinet outside the reference models, Air2O builds the unit on the same fan and coil construction.
- Perimeter, slab floor, or gallery installation
- 92.5 in. cabinet height, optional 116.1 in. extended
- Two-way or three-way valve, optional pressure-independent valve
- 2 in. MERV 8 filters, optional MERV 11
DDC Control, Modbus and BACnet
A DDC controller manages supply air temperature and humidity, fan sequencing, valve modulation, and alarms, with Modbus TCP and RTU standard and BACnet available. The submittal includes the points list and sequence of operations, so the controls contractor has them before the unit arrives on site.
- DDC controller, Modbus TCP and RTU standard
- Points list and sequence with the submittal
- Optional BACnet/IP and MS/TP, SNMP, and web access
- Optional group control, redundant sensing, and cooling override
Fan Array With Optional N+1 Spare
On multi-fan models, a single fan fault reduces airflow in proportion, and an optional N+1 spare fan holds full airflow. Filters, fans, and controls are reached from the front once the unit is isolated, and the control panel is built to UL 508A and run tested at the factory.
- ETL listed, control panel to UL 508A
- Factory-wired, run-tested panel and single-point power
- Optional N+1 spare fan
- Optional dual power feed with automatic transfer switch
Designed for greater performance,
energy efficiency and reliability!
Tailored Precision. We understand that no two data centers are the same. That's why we work closely with you to design and manufacture air handling units that perfectly align with your unique requirements, whether it's a small-scale operation or a massive cloud computing facility.
Energy Efficiency. In a world that's increasingly conscious of its environmental impact, our units are designed with energy efficiency in mind. We help you reduce your carbon footprint while optimizing performance, thus saving on operational costs.
Uncompromised Quality. We use the highest quality materials and cutting-edge technology to build units that are not just efficient but also reliable. Trust in the durability of our systems to safeguard your data center's continuity.
Industry-Leading Expertise. With a team of experts in air handling and data center cooling, we stay at the forefront of industry developments, ensuring that your data center remains ahead of the curve.
