HP Designjet L28500 HP Designjet L28500 Printer Series - Site preparation guid - Page 7

Environmental specifications These environmental conditions must be kept within the specified ranges to ensure the correct operation of the printer. Failure to do so may cause print-quality problems or damage sensitive electronic components. Table 2-2 Printer environmental specifications 1 2 Relative humidity range for best print quality 20-80%, depending on substrate type Temperature range for best print quality 18 to 25°C (64 to 77°F), depending on substrate type Temperature range for printing 15 to 30°C (59 to 86°F) Temperature range when not in operation Temperature gradient -25 to +55°C (-13 to +131°F) no more than 10°C/h (18°F/h) Maximum altitude when printing 3000 m (10000 ft) 1 The above specifications are pre-conditioning requirements for printer usage, the printer should stabilize to these environmental conditions at least 1 hour before starting to print, or 2 hours if it is starting from a lower temperature. 2 Some substrates may require longer pre-conditioning than the printer. Further environmental requirements ● The printer must be kept indoors. ● Do not install the printer where it will be exposed to direct sunlight or a strong light source. ● Do not install the printer in a dusty environment. Remove any accumulated dust before moving the printer into the area. ● If the printer or ink cartridges are moved from a cold location to a warm and humid location, water from the atmosphere can condensate on the printer parts and cartridges and can result in ink leaks and printer errors. In this case, HP recommends that you wait at least 3 hours before turning on the printer or installing the ink cartridges, to allow the condensate to evaporate. Ventilation and air conditioning As with all equipment installations, to maintain comfortable ambient levels, air conditioning or ventilation in the work area should take into account the printer's heat dissipation. Maximum power dissipation is 8-10 kW (27.3-34.1 kBTU/h). Adequate conditions can be established by air renewal if the external temperature is cold enough. Air conditioning and ventilation should meet with local environmental, health and safety (EHS) guidelines and regulations. Consult your usual air conditioning or EHS specialist for advice on the appropriate measures for your location. For a more prescriptive approach to adequate ventilation, see the ANSI/ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) 62.1-2007 Ventilation for Acceptable Indoor Air Quality. As an example, a minimum exhaust rate of 2.5 L/s.m² (0.50 cfm/ft²) of freshly made air for "copy, printing rooms" is recommended. NOTE: The ventilation and air-conditioning units should not blow air directly onto the printer. NOTE: Some air-conditioning systems or air-humidity control systems merely recycle the existing air in the room, which could cause saturation and lead to condensation. For optimal reliability and print quality, ensure adequate ventilation with fresh air and proper pre-conditioning. ENWW Physical space requirements 3