Replacement CRAH

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Replacement CRAH for Legacy Data Centers

Increase cooling capacity and achieve significant energy savings without redesigning your data center.

STULZ Replacement CRAHs are high capacity, direct drop-in, chilled water units with modern EC fans. They replace inefficient legacy units with belt-driven fans and provide instant energy savings and improved performance.

Data center
Data center
Our units are designed for highest requirements and maximum reliability
Small, medium & large rooms
Small, medium & large rooms
Precision air conditioning units for low to high heat loads
Low Noise
Low Noise
Particularly noise-optimized in operation
Control accuracy
Control accuracy
Temperature and humidity are kept precisely constant
Energy saving
Energy saving
Saving energy and costs

Product Overview

At a glance

STULZ Replacement CRAHs are high capacity, direct drop-in, chilled water units with modern EC Fans. They replace inefficient legacy units with belt-driven fans and provide instant energy savings and improved performance. Increase cooling capacity and achieve significant energy savings without redesigning your data center.

STULZ Replacement CRAHs provide energy saving advantages of up to 40%*, simply by replacing the CRAH. Additional energy savings of 50%* and beyond can be achieved using advanced controls. 

 

Replacement CRAHs Apply to:

  • Liebert FH 422C
  • Liebert FH 529C
  • Liebert FH 600C
  • Liebert FH 740C
Benefits
  • No modification to existing piping mains, primary electric, or floorstand
  • STULZ V-Coil arrangement
  • Energy saving advantages of up to 40%, simply replacing the CRAH
  • EC Fans consume less energy, therefore higher net cooling capacity
  • EC Fans provide optimized under-floor pressure and balanced airflow
  • Fast ROI; qualifies for utility rebates
  • Additional energy savings of 50% and beyond can be achieved using advanced controls
  • Provides advanced communication and control capabilities
  • Increased air volume at maximum fan speed
  • Lowers maintenance costs
  • EC Fans operate at lower speeds, lower energy, even air flow
  • Made in the USA
Features
  • State-of-the-art E2 Microprocessor with a range of BMS interface options
  • No modification to existing piping mains, primary electric, or floorstand
  • Increased flow rates at maximum fan speed • EC Fans produce less motor heat, therefore providing higher net cooling capacity
  •  EC Fans operate at lower speeds, lower energy, even air flow
  •  EC Fans provide optimized under-floor pressure and balanced air flow
  •  Fast ROI; qualifies for utility rebates
  •  Lowers maintenance costs
Technical Data


Chilled Water
kW76-124
BTU/hr261,000-423,000
Tons21-35
CFM12,500-18,600

Savings estimate is derived from actual performance text results of (1) STULZ CCD-1805 CWE-LR vs. (1) Liebert model FH740C, at 16,500 cfm, against 0.3" of external static pressure. Results may vary.

 Technical Data subject to change without notice.

STULZ E2 Control and Monitoring

  • The E2 Controller will allow communication with all major BMS/BAS systems
  • Updated existing control options (under-floor pressure control; return or supply air temperature control; independent fan and valve control)

STULZ E2 Controller ties everything together

  • Designed specifically for precision control of mission critical environments

  • Multiple I/O capabilities for all major components to optimize control for energy savings

  • Supports universal BMS interface for remote monitoring (address readable) and remote control (address writable)

  • Capable of network controllers in a workgroup (pLAN) to work as one (no BMS required)

  • Pre-engineered controls for economizers and adiabatic cooling

Benefits

Backlit LCD alphanumeric display for visual indicationOptional UPS backup module
Operated via 6-key menus, in five different modesIndependent EC fan and cooling control (CW valve or DX)
Unit functions for cooling, heating, humidifying and dehumidifyingCooling control sequence: return air temperature, humidity, supply air temperature, dew point
Three levels of restricted entry into the configurationFan control sequence: BMS, local/static pressure, and temperature based (supply or return air)
Sensor inputs control inputs/outputsCapable of networking up to eight E2 controllers with an independent LAN
Additional I/O sensors and alarmsPsychrometeric control provided as a user configurable temperature and humidity (relative humidity) or dew point control


STULZ E2 Controller communicates with BMS/BAS systems via the following protocols:

  • BACnet IP

  • BACnet over Ethernet

  • BACnet MS/TP

  • HTTP

  • SNMP V1, V2c

  • Modbus IP

  • Modbus RTU

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