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2.7 Checking Cooling Conditions

2.7 Checking Cooling Conditions
This section describes the cooling conditions for the SPARC M10 systems. Note the following conditions when installing the system:
  1. The air conditioning facilities for the room are sufficient to meet the cooling conditions of the entire system
  2. The air conditioning facilities have control functions for preventing excessive temperature changes
Table 2-7 lists the cooling conditions for each chassis.
Table 2-7  Cooling conditions
Configuration Input voltage CPU type Maximum heat dissipation Maximum exhaust airflow
200 to 240 VAC
SPARC64 X 10,410 kJ/hr (9,864 BTU/hr) 17.1 m3/min
    SPARC64 X+ 11,550 kJ/hr (10,950 BTU/hr) 18.7 m3/min
PCI expansion unit AC100 - 120 V - 1,005 kJ/hr (953 BTU/hr) 4.5 m3/min
200 to 240 VAC
972 kJ/hr (921 BTU/hr)
The SPARC M10 systems are designed to function in an environment with natural convection airflow.

The following requirements must be followed to meet the environmental specifications.
  1. Ensuring sufficient airflow for the entire system
    Each chassis is equipped with a cooling function for front-to-rear cooling. Each chassis has air vents on the front. Exhaust is expelled from the rear of each chassis. The SPARC M10 systems use internal fans whose airflow reaches the maximum exhaust airflow shown in Table 2-7 under normal operating conditions.
    Example: 17.1 m3 (603.8 ft.3) per minute for each SPARC M10-4 unit
  2. Ensuring that temperature at the intake part of each chassis does not exceed the limit value
    Other devices mounted in the rack must not cause the temperature at the intake part of any chassis to exceed the limit value. This limit value in environmental conditions assumes that each chassis operates with the rack door closed.