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2.7 Checking Cooling Conditions


2.7 Checking Cooling Conditions
This section describes the cooling conditions for the SPARC M12 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 Maximum Heat Dissipation Maximum Exhaust Airflow
SPARC M12-1
100 to 120 VAC
2,830 kJ/hr (2,680 BTU/hr) 2.2 m3/min
 
200 to 240 VAC
2,790 kJ/hr (2,640 BTU/hr)
PCI expansion unit
100 to 120 VAC
1,005 kJ/hr (953 BTU/hr) 4.5 m3/min
 
200 to 240 VAC
972 kJ/hr (921 BTU/hr)
The SPARC M12 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 M12 systems use internal fans whose airflow reaches the maximum exhaust airflow shown in Table 2-7 under normal operating conditions.
  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.