Airflow And Heat Dissipation; Shock And Vibration Requirements; Exp810 Airflow - IBM DS4000 EXP810 Installation, User's, And Maintenance Manual

Table 15. EXP810 altitude ranges
Environment
Operating
Storage
Transit

Airflow and heat dissipation

Figure 13 shows the intended airflow for the EXP810. Allow at least 30 inches in
front of the storage subsystem and at least 24 inches behind the storage subsystem
for service clearance, proper ventilation, and heat dissipation.
Figure 13. EXP810 airflow
Table 16 lists the KVA, watts, and Btu calculations. These values assume the power
supplies have a 73 percent efficiency and a power factor of 0.99. These tabulated
power and heat dissipation values are typical for the storage subsystem. Maximum
configuration units are typically operated at higher data rates, have larger random
access memory (RAM) capacities, or have different host interface boards.
Table 16. EXP810 power and heat dissipation
Parameter KVA
EXP810 0.454

Shock and vibration requirements

Operational shock and operational vibration requirements are shown in this section.
Operational Shock: The EXP810 will be able to withstand the following shock.
Subjecting the equipment to a single shock pulse with the following characteristics
will simulate this level of shock:
v Velocity change = 20 inches per second
®
v Wave form = Triangular, 10g @3.75 ms
Altitude
30.5 m (100 ft.) below sea level to 3000 m
(9842 ft.) above sea level
30.5 m (100 ft.) below sea level to 3000 m
(9842 ft.) above sea level
30.5 m (100 ft.) below sea level to 12,000 m
(40,000 ft.) above sea level
Watts (ac) Btu per hour
443 1516
Chapter 1. Introduction
21