Lenovo 5468 Setup Manual page 8

Table 1. Enclosure specifications (continued)
Specification
Acoustical noise emissions
Heat output
Electrical input
Water requirement
4
ThinkSystem SD650 Dual Node DWC Tray and NeXtScale n1200 DWC Enclosure Setup Guide
Description
Note: The following readings are worst case for the air cooling. The water cooling
results would be significantly less.
• Operation: 7.0 bels
• Idle: 6.5 bels
Approximate heat output:
• Minimum configuration (with one minimal configuration tray): 433 BTU per hour
(127 watts)
• Maximum configuration (with six maximal configuration trays): 40946 BTU per
hour (12000 watts)
• Sine-wave input (50-60 Hz) required
• Input voltage range:
– Minimum: 200 V AC
– Maximum: 240 V AC
• Minimum water flow rate: 6.0 liters per minute per enclosure, assuming 1.0 lpm
per compute tray with 6 trays per enclosure (1 tray consists of 2 compute nodes)
– For processors below 205 W: 6.0 liters per minute per enclosure, assuming 1.0
lpm per compute tray with 6 trays per enclosure (1 tray consists of 2 compute
nodes)
• Maximum pressure: 4.4 bars
Note: The water required to initially fill the system side cooling loop must be
reasonably clean, bacteria- free water (<100 CFU/ml) such as de-mineralized water,
reverse osmosis water, de-ionized water, or distilled water. The water must be
filtered with an in-line 50 micron filter (approximately 288 mesh). The water must be
treated with anti-biological and anti-corrosion measures.