Table 2-2 Critical Temperature Limits - Emerson Centellis 2000 Shelf Release 3.0 Manual

Table 2-1 Environmental Conditions (continued)
Feature
Free fall
Noise
The ambient temperature is defined as the air inlet temperature.
The system regulates the fan speed based on the temperature sensors present in the
shelf. The fan speed is adjusted to the lowest speed which still keeps the evaluated
temperature readings below or at their respective "upper non-critical threshold". Hence,
the fan speed depends on the ambient temperature, blade design, temperature
threshold settings, and system configuration.
To guarantee proper blade operation, you have to make sure that the temperatures at the
locations specified in the following are not exceeded. If not stated otherwise, the temperatures
should be measured by placing a sensor exactly at the given locations.

Table 2-2 Critical Temperature Limits

Component
Air inlet (system's front)
Centellis 2000 Shelf Release 3.0 Installation and Use (6806800L99F)
Operating
-
ETSI ETS 300 753 (Oct. 1997)
Telecommunication equipment rooms
(attended): 7.2 Bel
Measurement of "declared A-weight
sound power level"
All values are applicable to normal
operating conditions (~23 °C/73.4 °F)
NEBS GR-63-CORE, Issue 3
Telecommunication equipment rooms
(attended): 78 dB
Measurement of "declared A-weight
sound power level"
All values are applicable to normal
operating conditions (~27 °C/80.6 °F).
Non-Operating (packed state)
800 mm (packaged)
10 kg to 25 kg: 75 mm, >25 kg: 50 mm
(unpacked) per GR-63-CORE
fully populated system
-
Maximum Temperature
55 °C (131 °F)
Site Preparation
45