IBM SAN256B-6, Installation, Service And User Manual

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Airflow direction can be verified by entering the chassisShow command. Following is an example from
command output indicating mis-matching airflow. WWN units should indicate "Non-portside Intake".
POWER SUPPLY Unit: 1
Power Source: AC
Fan Direction: Non-portside Intake
...
FAN
Unit: 2
Fan Direction: Non-portside Intake
...
WWN
Unit: 1
System AirFlow: Non-portside Exhaust
...
WWN
Unit: 2
System AirFlow: Non-portside Exhaust
Note:
Ensure that captive screws securing the fan and power supply assemblies are tightened. If they are
not, air pressure inside chassis may unseat these FRUs from chassis connectors.
Power supply assembly numbering
The following figure illustrates the location and number identification of power supply assemblies in the
chassis.
1 - Power supply 1
2 - Power supply 2
HVAC/HVDC power supply overview
The SAN256B-6 device supports a dual-function high-voltage AC, high-voltage DC (HVAC/HVDC)
power supply assembly. This power supply converts AC or DC input to the required DC output power
required for device operation.
Each HVAC/HVDC power supply assembly provides the following power outputs in Watts at the
indicated AC and DC input rated voltages:
v 1450 W (100-120 VAC)
v
2870 W (200-277 VAC)
v 2870 W (240-380 VDC)
The following HVAC/HVDC power supply models are supported:
v Power supply model supporting nonport-side air intake (NPI). This assembly has two fans that move
the air from the nonport side to the port side of the device.
v Power supply model supporting nonport-side air exhaust (NPE). This assembly has two fans that
move the air from the port side to the nonport side of the device.
Consider the following important notes about installing this power supply:
v You cannot upgrade from standard voltage AC power supplies in an existing chassis to HVAC/HVDC
power supplies. You must order a new base chassis and the required HVAC/HVDC power supplies.
Figure 67. Power supply assembly numbering
Power Supply Assemblies
163