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Environment Specifications
Environment Specifications
Climatic Environment Requirements
Table 11-3 Climatic environment requirements
Item
Specifications
Temperature
Operating temperature: 5°C to 45°C (41°F to 113°F) (ASHRAE Class A3 compliant)
Storage temperature: –40°C to +70°C (–40°F to +158°F)
Non-operating temperature: 5°C to 40°C (41°F to 104°F)
Long-term storage temperature: 21°C to 27°C (69.8°F to 80.6°F)
Maximum temperature change rate: 20°C/h (36°F/h)
Humidity (RH, non-condensing)
Operating humidity: 10%–90%
Storage humidity: 5%–95%
Long-term storage humidity: 30%–69%
Maximum humidity change rate: 20%/h
Altitude
Operating altitude: ≤ 3000 m (9842.4 ft), 40°C@900 m (104°F@2952.72 ft)
NOTE:
When the altitude is above 900 m (2952.76 ft), the highest operating temperature decreases by 1°C (1.8°F) for every increase of 300 m (984.24 ft).
Corrosive gas contaminants
Corrosion rate of the copper test piece < 300 Å/month (in compliance with the ANSI/ISA-71.04-2013 gaseous corrosion level G1).
Corrosion rate of the silver test piece < 200 Å/month
Particulate pollutant
Meets the ISO14664-1 Class8 requirements. It is recommended that a professional organization monitor particulate pollutants in the equipment room.
There is no explosive, conductive, magnetic, or corrosive dust in the equipment room.
Equipment Room Environment Requirements
Table 11-4 Specifications of the connector between the full liquid cooling cabinet and the secondary pipe
Item
Specifications
Operating temperature
Minimum water temperature: 3°C (37.4°F) above the dew point temperature or 5°C (41°F), whichever is lower
Maximum water temperature: 50°C (122°F)
Ambient temperature: 5°C to 40°C (41°F to 104°F)
Temperature change rate: < 20°C (36°F)/h
Flow rate
The cabinet is fully configured with 2288C V5 (CH121L V5): 40 L/min
Operating pressure
≤ 3.5 bar
Inlet-outlet water pressure difference of the full liquid cooling cabinet
≥80 kPa
Connectors on the full liquid cooling cabinet
1-inch male quick connect coupling (G1 female threaded, water inlet)
1-inch female quick connect coupling (G1 female threaded, water outlet)
Table 11-5 Secondary pipe requirements
Item
Specifications
Working medium
25% glycol and deionized water (with BTA corrosion inhibitor)
Connector between the CDU and the primary side
See the CDU manual.
Connector between the CDU and the secondary side
See the CDU manual.
Pipe materials
Hose: Inner rubber layers made of butyronitrile synthetic rubber are recommended.
Hard pipe: stainless steel (304, 316, or 316L)
Pressure-bearing capability
> 1 MPa
Water overpressure protection threshold
6 bar
Pipe diameter
Hose and hard pipe: Calculate the diameter based on the site survey, flow rate, and pressure drop.
When the 2288C V5 uses the 6290 CPU, only 45°C (113°F) is supported.
Supply water temperature of the primary side
The inlet water temperature supported by the primary pipe is 5°C to 32°C (41°F to 89.6°F). In special scenarios, the maximum inlet water temperature supported is 35°C (95°F).
NOTE:
Special scenarios refer to the scenarios with restrictions on device configurations and environment specifications. For details, contact Huawei engineers.
Water quality of the primary side
pH (25°C (77°F)): 7.5–10
Turbidity: ≤ 10 NTU
Conductivity (25°C): ≤ 2000 uS/cm
Cl: ≤ 250 mg/L
Total Fe: ≤ 1.0 mg/L
Ca (CaCO3): ≤ 300 mg/L
Total basicity (CaCO3): ≤ 500 mg/L
Dissolved oxygen: ≤ 0.1 mg/L
Organic phosphorus (P): ≤ 0.5 mg/L
Auxiliary equipment of the primary side
Filter (with a maximum particle diameter of 380 um)
Condensate drainpipe (with a diameter greater than 25 mm)
Manifold flow requirements
Number of nodes x Flow of a single node x 1.05
Flow requirements for the air/liquid heat exchanger in the cabinet
≥40LPM
Maximum pressure difference between supply and return water of the air/liquid heat exchanger in the cabinet
≥80kPa
Maximum operating pressure of the liquid pipe of the cabinet
