Electrical specifications Table 1-3 lists the electrical specifications required to run the printer safely. Table 1-3 Electrical specifications * When the printer is in standby (off) mode, it continues to consume a minimal amount of energy. Note This information is preliminary and might not be current. Please see http://www.hp.com/support/ lj4550 for current information. Environmental specifications Keep the printer within the environmental conditions shown in Table 1-4 for optimum performance.
Table 1-4 Environmental specifications 22 Printer description C7085-90921 Item 110-volt models 220-volt models Power requirements 100-127 V (+/- 10%) 50/60 Hz (+/- 2 Hz) 220-240 V (+/- 10%) 50/60 Hz (+/- 2 Hz) Power consumption (typical) During printing During standby* During PowerSave Off 470 W (average) 80 W (average) 4500: 32 W 4550: 0 W 480 W (average) 90 W (average) 4500: 32W 4550: 0 W Minimum recommended circuit capacity for typical product 4500: 16.0 A at 120 V 4550: 10.2 A at 120 V 4500: 7.1 A at 220 V 4550:
5.1 A at 220 V Item Operating Temperature Recommended Allowed 20° to 26° C (68° to 79° F) 15° to 30° C (59° to 86° F) Humidity Recommended Allowed 20% to 50% RH 10% to 80% RH Altitude Allowed 0 to 3100 m (0 to 10,000 ft)