Temperature And Humidity Requirements For Storage Expansion Enclosure When In Storage Or In Transit; Airflow And Heat Dissipation - IBM DCS3860 Installation, User's, And Maintenance Manual

Temperature and humidity
Table 8 lists the acceptable temperature and humidity ranges for the DCS3860
storage expansion enclosure when in storage or in transit.
Note: Substantial deviations from the suggested operating range, in either
direction, if sustained for extended periods of time, expose the unit to greater risk
of failure from external causes.
Table 8. Temperature and humidity requirements for storage expansion enclosure when in
storage or in transit.
Condition
Temperature
Relative humidity (no
condensation)
Altitude
Table 9 lists the acceptable altitudes for operating, storing, and shipping the
DCS3860.
Table 9. DCS3860 altitude ranges
Environment
Operating
Storage
Transit

Airflow and heat dissipation

Figure 11 on page 20 shows the intended airflow for the DCS3860. Allow at least 30
inches in front of the storage system and at least 24 inches behind the storage
system for service clearance, ventilation, and heat dissipation.
Parameter
Operating range
Maximum rate of change
Storage range
Maximum rate of change
Transit range
Maximum rate of change
Operating range
Storage range
Transit range
Maximum dew point
Maximum gradient
Altitude
30.5 m (100 ft.) below sea level to 3000 m
(9,840 ft) above sea level
30.5 m (100 ft.) below sea level to 3000 m
(9,840 ft) above sea level
30.5 m (100 ft.) below sea level to 12,000 m
(40,000 ft.) above sea level
Requirement
10° - 35° C (50° - 95° F)
10° C (18° F) per hour
-10° - 65° C (14° - 149° F)
15° C (27° F) per hour
-40° C to 65° C (-40° F to 149°
F)
20° C (36° F) per hour
20% to 80%
10% to 90%
5% to 95%
26° C (79° F)
10% per hour
Chapter 1. Introduction
19