System Fans; Resetting The Power Supply; Environmental Specifications; Energy Star - HP Xw4550 - Workstation - 2 GB RAM Technical Reference Manual

System fans

The workstation includes a rear chassis fan, one processor heatsink fan, and one power supply fan. An
optional front PCI fan is available for special considerations, such as graphics PCI cards.

Resetting the power supply

If an overload triggers the power supply overload protection, all power is immediately disconnected. To
reset the power supply unit:
1. Disconnect the power cord.
2. Determine what caused the overload and correct the problem.
3. Reconnect the power cord, apply power, and reboot the workstation.
NOTE: When you power down your workstation with the power button on the front panel, the power
consumption falls below 10W. To reach zero power consumption, remove power from the workstation.
For additional information on power-saving features, see your operating system documentation.

Environmental specifications

This section describes environmental specifications of your workstation.
Temperature
Humidity
Altitude
Shock
Vibration

ENERGY STAR

Hewlett-Packard computers marked with the ENERGY STAR® Logo are compliant with the applicable
U.S. Environmental Protection Agency (EPA) ENERGY STAR specifications for computers. The EPA
ENERGY STAR Logo does not imply endorsement by the EPA. As an ENERGY STAR Partner, Hewlett-
Packard Company has determined the products marked with the ENERGY STAR Logo are ENERGY
ENWW
Operating: 5 to 35°C (40 to 95°F)
Non-operating: -40 to 60°C (-40 to 140°F)
NOTE: Derate by one degree C (1.4 degrees F) for every 305m (1,000 ft.)
altitude over 1,524m (5,000 ft.).
Operating: 8 to 85% RH, non-condensing
Non-operating: 8 to 90% RH, non-condensing
Operating: 0 to 3,048m (10,000 ft.)
Non-operating: 0 to 9,144m (30,000 ft.)
Operating: ½-sine: 40g, 2-3ms
Non-operating:
●
½-sine: 160 cm/s, 2-3ms (~100g)
● square: 422 cm/s, 20g
NOTE: Values represent individual shock events and do not indicate repetitive
shock events.
Operating random: 0.5g (rms), 5-300 Hz
Non-operating random: 2.0g (rms), 10-500 Hz
NOTE: Values do not indicate continuous vibration.
ENERGY STAR 11