Metallic Particulate Contamination; Cooling Requirements; Basic Air-Conditioning Equipment Requirements; Maximum Contaminant Gas Levels - HP 9000 rp3410 Manual

See http://www.isa.org/
If the environment does not meet G1 levels, third party experts in remediation should be engaged
to help bring the site into compliance. This work will include verifying contaminant levels and
sources, as well as determining the most effective remediation techniques. Those may include
filtration and abatement of the environment by qualified professionals to remove the contaminants.
Table 1-1 Maximum Contaminant Gas Levels
Maximum Group A contaminant gas levels in customer environments for class G1 in Table 3 of ISA–71.04
Contaminant Gas
H S
2
SO , SO
2 3
Cl
2
NO
x
These values have been included for convenience and reflect the gas concentration levels in Table 3 of ISA–71.04.
The complete ISA document is available through the ISA website at:
http://www.isa.org/.
Be aware when reviewing air quality that temperature and relative humidity can be a factor in
corrosive issues.

Metallic Particulate Contamination

Metallic particles can be especially harmful around electronic equipment. This type of
contamination can enter the data center environment from a variety of sources, including but
not limited to raised floor tiles, worn air-conditioning parts, heating ducts, rotor brushes in
vacuum cleaners, or printer component wear. Because metallic particles conduct electricity, they
have an increased potential for creating short circuits in electronic equipment. This problem is
exaggerated by the development of more dense circuitry of electronic equipment.
Over time, very fine whiskers of pure metal can form on electroplated zinc, cadmium, or tin
surfaces. If these whiskers are disturbed, they can break off and become airborne, possibly causing
failures or operational interruptions. For more than 50 years, the electronics industry has been
aware of the relatively rare but possible threat posed by metallic particulate contamination.
During recent years, concern has increased regarding metallic particulate contamination in
computer rooms where these conductive contaminants are formed on the bottom of some raised
floor tiles.
Although this problem is relatively rare, it can be an issue within your computer room. Because
metallic contamination can cause intermittent or permanent failures on your electronic equipment,
HP strongly recommends to test your site for metallic particulate contamination before installing
electronic equipment.

Cooling Requirements

Air-conditioning equipment requirements and recommendations are described in the following
sections.

Basic Air-Conditioning Equipment Requirements

The cooling capacity of the installed air-conditioning equipment for the computer room must
be sufficient to offset the computer equipment dissipation loads, as well as any space envelope
heat gain. This equipment must include:
• Air filtration
• Cooling or dehumidification
for more information.
Maximum Parts per Billion (ppb)
3
10
1
50
Environmental Elements 21