Chapter 8: Product Guide Specifications
8. Product Guide Specifications
SUMMARY
This specification describes requirements for a precision environmental control system. The Cold Row CW is a row-based cooling system that provides precision temperature control (and humidity control for the 24" models) for computer rooms, or rooms containing telecommunications or other highly sensitive heat load equipment, where continuous 24 hours a day, 365 days a year air conditioning is required. Designed with both front and rear access, Cold Row CW systems require minimum floor space. The supplied system has ETL Certification. The part numbers are CRCW-12 and CRCW-24.
DESIGN REQUIREMENTS
The environmental control system is a Cold Row Chilled Water (CW) factory-assembled unit. The unit is designed for a row-based installation with removable front and rear access panels. No allowance for side service access is required, however, removable side access panels are provided for additional access.
Cold Row CW units are especially adapted for both raised and non-raised floors. The air handling system is specifically designed for high sensible heat ratio. Each system is capable of handling ___CFM. The unit shall have the cooling capacity of ___BTU/H, and the sensible cooling capacity of ___BTU/H based on entering air condition of ___°F (°C) dry bulb and ___°F (°C) wet bulb. The main fan motors shall be ___HP. The unit shall have a power supply of ___volts.
QUALITY ASSURANCE
The manufacturer will maintain a set of international standards of quality management to ensure product quality. Each system will be subjected to a complete operational and functional test procedure at the factory before shipment.
CABINET
Access panels must be fabricated from 18-gauge galvannealed steel and must be securely fastened to the 10-gauge base and
16-gauge top plates, fabricated from galvannealed steel. Both must be painted with a 2-ply epoxy finish to match and to protect from corrosion. The main unit color shall be satin black. Armaflex® elastomeric thermal insulation must be used to insulate the cabinet, block noise, and prevent damage from vibration. Casters and leveling feet shall be included to ease the installation and level the equipment with existing IT solutions.
AIRFLOW PATTERNS
All units must be designed using a front discharge with a rear return airflow pattern. An optional plenum with a front diverted discharge pattern is available.
AIR FILTRATION
All units must be equipped with permanent washable filters. These filters must consist of an open cell structured polyurethane foam with a roll-formed 3000 series aluminum frame. Filters shall meet both UL® 900 and UL 94 HF-1 standards.
MECHANICAL COMPONENTS
BACKWARD-INCLINED, PLENUM-STYLE FAN, WITH AN EC MOTOR
The blowers must be backward-inclined, plenum-style fans with an electronically commutated (EC) motor, for maintenance-free operation. The motor must include: integrated electronic control board and direct microprocessor control signaling for fan speed control, soft-starting capabilities, and integrated current limitations. Each fan must be low noise, low vibration manufactured with an anti-corrosive aluminum impeller. Each fan impeller must be dynamically and statically balanced in two planes to minimize vibration during operation.
