Environmental requirements

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Your facility should meet specified temperature, humidity, and air quality requirements before installing the TS7700.

Table 1 shows recommended environmental conditions for the TS7700.

Table 1. Temperature, altitude, and humidity specifications
Condition Air temperature Altitude Relative humidity1 Wet bulb temperature
Operating (low altitude) 10°C to 32°C (50°F to 89.6°F) up to 5000 ft amsl 20% to 80% 23°C (73°F)
Operating (high altitude) 10°C to 28°C (50°F to 82.4°F) 5001 ft amsl to 7000 ft amsl 20% to 60% 23°C (73°F)
Recommended Operating Range2 20°C to 25°C (68°F to 77°F) up to 7000 ft amsl 40% to 55% —
Power Off 10°C to 43°C (50°F to 109°F) — 8% to 80% 27°C (80°F)
Storage 1°C to 60°C (33.8°F to 140°F) — 5% to 80% 29°C (84°F)
Shipping -40°C to 60°C (-40°F to 140°F) — 5% to 100% 29°C (84°F)
Notelist:
  1. Non-condensing
  2. Although the TS7700 operates outside this range, it is advised that the user adhere to the Recommended Operating Range provided.
Table 2. Air quality specifications
Specification Restrictions
Gaseous contamination Severity level G1 according to ANSI/ISA 71.04-19851, which states that the reactivity rate of copper coupons is fewer than 300 Angstroms per month (Å/month, ≈ 0.0039 μg/cm2-hour weight gain)2. In addition, the reactivity rate of silver coupons is less than 300Å/month (≈ 0.0035 μg/cm2-hour weight gain)3. The reactive monitoring of gaseous corrosivity should be conducted approximately 5 cm (2 in.) in front of the rack on the air inlet side at one-quarter and three-quarter frame height off the floor or where the air velocity is much higher
Particulate contamination Data centers must meet the cleanliness level of ISO 14644-1 class 8. For data centers without airside economizer, the ISO 14644-1 class 8 cleanliness might be met by the choice of the following filtration: The room air might be continuously filtered with MERV 8 filters. Air entering a data center might be filtered with MERV 11 or preferably MERV 13 filters. For data centers with airside economizers, the choice of filters to achieve ISO class 8 cleanliness depends on the specific conditions present at that data center. The deliquescent relative humidity of the particulate contamination should be more than 60% RH4. Data centers must be free of zinc whiskers5.
Notelist:
  1. ANSI/ISA-S71.04. 1985. Environmental conditions for process measurement and control systems: Airborne contaminants, Instrument Society of America, Research Triangle Park, NC, 1985.
  2. The derivation of the equivalence between the rate of copper corrosion product thickness growth in Å/month and the rate of weight gain assumes that Cu2S and Cu2O grow in equal proportions.
  3. The derivation of the equivalence between the rate of silver corrosion product thickness growth in Å/month and the rate of weight gain assumes that Ag2S is the only corrosion product.
  4. The deliquescent relative humidity of particulate contamination is the relative humidity at which the dust absorbs enough water to become wet and promote ionic conduction.
  5. Surface debris is randomly collected from 10 areas of the data center on a 1.5-cm diameter disk of sticky electrically conductive tape on a metal stub. If examination of the sticky tape in a scanning electron microscope reveals no zinc whiskers, the data center is considered free of zinc whiskers.