Environmental specifications

Summary of the environmental specifications of solution. Depending on the model, some features might not be available, or some specifications might not apply.

Attention

Environment quality must be maintained over the lifetime of the system to receive warranty and support on affected components. For water quality requirement, see Lenovo Neptune Direct Water-Cooling Standards.

Note

Up to eight SC777 V4 trays can be installed in an N1380 13U enclosure.
Each SC777 V4 tray contains two GB200-NVL4 boards

Environment
Air temperature requirements: Operating: ASHRAE class A3: 5°C - 40°C (41°F - 104°F); when the altitude exceeds 900 m (2953 ft), the maximum ambient temperature value decreases by 1°C (1.8°F) with every 175 m (574 ft) of altitude increase. Powered off: 5°C - 45°C (41°F - 113°F) Shipping/storage: -40°C - 60°C (-40°F - 140°F) Relative humidity (non-condensing): Operating: ASHRAE Class A3: 8% - 85%, maximum dew point : 24°C (75°F) Shipment/storage: 8% - 90% Maximum altitude: 3048 m (10 000 ft) Note The solution is designed for standard data center environment and is recommended for placement in an industrial data center.

Environment

Air temperature requirements:
- Operating:
  - ASHRAE class A3: 5°C - 40°C (41°F - 104°F); when the altitude exceeds 900 m (2953 ft), the maximum ambient temperature value decreases by 1°C (1.8°F) with every 175 m (574 ft) of altitude increase.
- Powered off: 5°C - 45°C (41°F - 113°F)
- Shipping/storage: -40°C - 60°C (-40°F - 140°F)
Relative humidity (non-condensing):
- Operating: ASHRAE Class A3: 8% - 85%, maximum dew point : 24°C (75°F)
- Shipment/storage: 8% - 90%
Maximum altitude: 3048 m (10 000 ft)

Note

The solution is designed for standard data center environment and is recommended for placement in an industrial data center.

Water requirements — pressure drop

Table 1. Pressure drop for S45 (45°C from CDU)
	1 PCS	2 PCS	3 PCS	4 PCS
SC777 V4 quantity	Pressure drop (bar)	Pressure drop (bar)	Pressure drop (bar)	Pressure drop (bar)
1	0.63	0.64	0.65	0.65
2	0.64	0.65	0.66	0.67
3	0.66	0.67	0.69	0.70
4	0.68	0.70	0.72	0.73
5	0.71	0.73	0.75	0.77
6	0.75	0.77	0.79	0.83
7	0.79	0.82	0.84	0.88
8	0.84	0.87	0.89	0.93

Table 2. Pressure drop for S40 (40°C from CDU)
	1 PCS	2 PCS	3 PCS	4 PCS
SC777 V4 quantity	Pressure drop (bar)	Pressure drop (bar)	Pressure drop (bar)	Pressure drop (bar)
1	0.46	0.46	0.46	0.48
2	0.47	0.47	0.48	0.50
3	0.48	0.49	0.50	0.52
4	0.50	0.51	0.52	0.54
5	0.53	0.54	0.55	0.57
6	0.55	0.57	0.58	0.62
7	0.58	0.60	0.62	0.65
8	0.62	0.64	0.66	0.70

Table 3. Pressure drop for S32 (32°C from CDU)
	1 PCS	2 PCS	3 PCS	4 PCS
SC777 V4 quantity	Pressure drop (bar)	Pressure drop (bar)	Pressure drop (bar)	Pressure drop (bar)
1	0.29	0.29	0.30	0.31
2	0.30	0.30	0.31	0.32
3	0.31	0.32	0.32	0.34
4	0.32	0.33	0.34	0.35
5	0.34	0.35	0.35	0.37
6	0.36	0.37	0.38	0.39
7	0.38	0.39	0.40	0.42
8	0.40	0.41	0.43	0.45

Table 4. Pressure drop for S27 (27°C from CDU)
	1 PCS	2 PCS	3 PCS	4 PCS
SC777 V4 quantity	Pressure drop (bar)	Pressure drop (bar)	Pressure drop (bar)	Pressure drop (bar)
1	0.25	0.25	0.25	0.25
2	0.25	0.26	0.26	0.26
3	0.26	0.27	0.27	0.28
4	0.27	0.28	0.28	0.30
5	0.29	0.29	0.30	0.32
6	0.30	0.31	0.32	0.33
7	0.32	0.33	0.34	0.35
8	0.34	0.35	0.36	0.38

Water requirements — water flow rates

Water requirements — water flow rates
Attention 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. Environment quality must be maintained over the lifetime of the system to receive warranty and support on affecting components. For more information, please see Lenovo Neptune Direct Water-Cooling Standards. Water flow rates 45°C water temperature Water flow rate per SC777 V4 tray: 7.0 lpm Water flow rate per PCS: 3.4 lpm Water flow rate per enclosure: the sum of 7.0 lpm(the number of trays) plus 3.4 lpm(the number of PCS) 40°C water temperature Water flow rate per SC777 V4 tray: 6.0 lpm Water flow rate per PCS : 2.8 lpm Water flow rate per enclosure: the sum of 6.0 lpm(the number of trays) plus 2.8 lpm(the number of PCS) 32°C water temperature Water flow rate per SC777 V4 tray: 4.8 lpm Water flow rate per PCS : 2.2 lpm Water flow rate per enclosure: the sum of 4.8 lpm(the number of trays) plus 2.2 lpm(the number of PCS) 27°C water temperature Water flow rate per SC777 V4 tray: 4.4 lpm Water flow rate per PCS : 2.0 lpm Water flow rate per enclosure: the sum of 4.4 lpm(the number of trays) plus 2.0 lpm(the number of PCS) For example, when an N1380 enclosure is installed with eight SC777 V4 trays and four PCS, and the water temperature is 45°C, the enclosure water flow rate is 69.6 lpm (7.0 lpm8 plus 3.4 lpm4)

Attention

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. Environment quality must be maintained over the lifetime of the system to receive warranty and support on affecting components. For more information, please see Lenovo Neptune Direct Water-Cooling Standards.

Water flow rates

45°C water temperature
- Water flow rate per SC777 V4 tray: 7.0 lpm
- Water flow rate per PCS: 3.4 lpm
- Water flow rate per enclosure: the sum of 7.0 lpm*(the number of trays) plus 3.4 lpm*(the number of PCS)

40°C water temperature
- Water flow rate per SC777 V4 tray: 6.0 lpm
- Water flow rate per PCS : 2.8 lpm
- Water flow rate per enclosure: the sum of 6.0 lpm*(the number of trays) plus 2.8 lpm*(the number of PCS)

32°C water temperature
- Water flow rate per SC777 V4 tray: 4.8 lpm
- Water flow rate per PCS : 2.2 lpm
- Water flow rate per enclosure: the sum of 4.8 lpm*(the number of trays) plus 2.2 lpm*(the number of PCS)

27°C water temperature
- Water flow rate per SC777 V4 tray: 4.4 lpm
- Water flow rate per PCS : 2.0 lpm
- Water flow rate per enclosure: the sum of 4.4 lpm*(the number of trays) plus 2.0 lpm*(the number of PCS)

For example, when an N1380 enclosure is installed with eight SC777 V4 trays and four PCS, and the water temperature is 45°C, the enclosure water flow rate is 69.6 lpm (7.0 lpm*8 plus 3.4 lpm*4)

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Environmental specifications

Water requirements — pressure drop​

Water requirements — water flow rates​

Water requirements — pressure drop

Water requirements — water flow rates