Seawater (Salt Damage) - Fujitsu M10 Series Installation Planning Manual

CHAPTER 4 Air Conditioning
Gas name
Nitrogen dioxide (nitrogen oxide) (NO
Ammonia (NH
Ozone (O
Oil vapor
4.3.6

Seawater (salt damage)

The air in the vicinity of coastal areas contains large amounts of airborne sea salt
particles. If these particles remain inside computers, substances are formed by a
condensation reaction of chemicals. These substances and the humidity lead to
insulation failure and the corrosion and deterioration of components and materials.
Therefore, computers should be installed in locations at a distance from coastal areas.
The following outlines installation criteria for preventing salt water damage due to
airborne sea salt particles.
Criteria: The installation site shall not be within 0.5 km of the ocean or coastal areas
(unless the computer room uses air conditioners to filter out airborne sea salt particles
from outside air).
44
Table 4.4 Tolerable limits for corrosive gases (2/2)
)
3
)
3
Tolerable limit
) Up to 52 ppb
2
Up to 420 ppb
Up to 5 ppb
3
Up to 0.2 mg/m
C120-H007-08EN