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FusionStorage OBS 7.0 Hardware Installation Guide 06

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Checking the Installation Environment

Checking the Installation Environment

Check the device installation environment before installation.

Table 3-4 lists the check items and requirements on the installation environment.

Table 3-4 Installation environment checklist

Check Item

Requirement

Site selection

The site of the equipment room must be free of high or low temperature, heavy dust, harmful gas, dangerous goods (substances that easily catch fire or explode), electromagnetic interference (nearby a large-sized radar station, broadcast transmitting station, or transformer station), unstable electric voltage, and large vibration or strong noise. During the engineering design, you need to consider hydrology, geology, earthquake, electric power, and transportation conditions according to the technical requirements for communications network planning and communication devices.

Equipment room

  • The size of the equipment room must be enough for product installation and capacity expansion.
  • The floor of the equipment room can bear at least 600 kg per square meter.
  • The cabling slot, ladder, and hole are complete or ready. The decoration is complete.

Air conditioner

If the temperature in the equipment room exceeds 30°C, install air conditioners (which can automatically restart when power is supplied). Do not let the air conditioners blow directly to the devices.

Moisture proof

When the relative humidity is greater than 70%, install dehumidifying devices, such as the air conditioner with the dehumidification function or a special dehumidifier. Ensure that the equipment room is protected from moisture and water seepage.

Heating

If the number of accumulated days whose average day temperature is below 5°C around the year is greater than or equal to 90, a heating device must be installed. If the number of accumulated days whose average day temperature is below 5°C is greater than or equal to 60 but less than 90 around the year, a heating device is recommended.

Ventilation and heat dissipation

A cabinet should be at least 1000 mm away from the walls and have a clearance of at least 1200 mm with another cabinet. This ensures smooth ventilation.

To keep a convective air transfer between the cabinet and the equipment room, no enclosed space is allowed in the cabinet. It is recommended that you leave 1 U (1 U = 44.45 mm) space above and below each device.

Dust proof

If the equipment room is located around a sand source (such as a coal mine, countryside road, and farming land), you must use double aluminum alloy windows and anti-theft fire doors. Separate the devices from the door of the room with a partition board to avoid part of dust.

Particle contaminants

  • Meet the cleanliness requirements defined by ISOa 14664-1 Class 8.
  • You are advised to ask a professional organization to monitor the particle contaminants in the equipment room.

Corrosive airborne contaminants

  • The corrosion rate of the copper test wafer is lower than 300 Åb/month as per ANSI/ISA-71.04 severity level G1.
  • The corrosion rate of the silver test wafer is lower than 200 Åb/month as per ANSI/ISA-71.04 severity level G1.
  • You are advised to ask a professional organization to monitor the corrosive airborne contaminants in the equipment room.
  • The following is an example of initial evaluation for environmental corrosion risks.
    • Whether the equipment room is near any sulfurous gas emission sources, for example, porcelain factories, rubber plants, tire factories, chemical factories, sewage plants, power stations, paper mills, smelters, automobile factories, coal mines, electroplating factories, food factories, and tanneries? If yes, environmental corrosion risks may exist.
    • Whether the equipment room is near the sea, saline lakes, sewer outlets, sewage treatment tanks, and industrial/heating boilers? If yes, environmental corrosion risks may exist.
    • Whether the equipment room was decorated in the latest six months? If yes, environmental corrosion risks may exist.
    • Whether batteries are stocked in the equipment room? Whether the storage battery leaks? If yes, environmental corrosion risks may exist.
    • Whether the equipment room is closed tightly? Whether the room windows and doors are always closed? If no, environmental corrosion risks may exist.

Ground resistance

Less than 10 Ω. The distance between the top of a grounding terminal and the ground should be at least 0.7 m. In cold regions, the grounding terminal should be buried under the layer of frozen earth. Monitor ground resistance periodically to ensure effective grounding.

Ground lead-in

The ground bar in the equipment room should be connected to the network of ground cables reliably. The ground lead-in should not be longer than 30 m and should use the zinc-coated flat steel whose cross-sectional area is equal to or more than 40 mm x 4 mm. The contact point should be handled for insulation and anticorrosive purposes. The above-ground steel should be provided with measures to avoid mechanical damage and should be intact without soldering points for the break.

Lightning protection

The equipment room must be equipped with a lightning protection device, such as a lightning rod or lightning strip. The grounding of the lightning protection device (such as the lightning rod) shares the same ground body as the protection ground of the equipment room.

AC voltage

The AC voltage in the equipment room must be within 100 V to 127 V or 200 V to 240 V. The AC power distribution switches and the AC power cable must be installed correctly.

AC grounding

Do not connect the neutral line of a power cable to the protection ground bar of any communication devices in the equipment room. You are advised to deploy leading-out terminals for the AC safety ground to ground the devices conveniently.

AC lightning protection

The AC power system of the equipment room must be equipped with a lightning arrester with the rated discharging current no less than 20 kA. The arrester must be properly grounded.

Cabinet

The cabinet must be a standard 19-inch cabinet with a depth of at least 800 mm.

a: International Organization for Standardization

b: a unit of length equal to 1/10,000,000,000 (one ten billionth) of a meter

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Updated: 2019-07-17

Document ID: EDOC1100051333

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