HP ProLiant SL270s HP ProLiant SL Servers Planning Guide - Page 10

Recommended operating environment To help ensure continued safe and reliable equipment operation, install or position the rack in a well ventilated, climate-controlled environment. Air inlet temperature to the rack should be between 20 to 25ºC under normal operating conditions in the data center, per ASHRAE standard TG9 HDEC. The following table shows product technical requirements based on customer environments. Operating Environment (ambient)1 Environment Industry equivalent3 ASHRAE Temperature (ºC, dry bulb)2 Relative humidity %; noncondensing Allowable4 Recommended6 Allowable5 Recommended6 Dew ,5 point (max)7 Controlled 1 computer room 15 to 32 20 to 25 20 to 80 40 to 55 17 Controlled office 2 10 to 35 20 to 25 20 to 80 40 to 55 21 Uncontrolled 3 5 to 35 NA8 8 to 85 NA8 28 office Home 3 5 to 35 NA8 8 to 85 NA8 28 Light industrial 4 5 to 40 NA8 8 to 90 NA8 28 Portable/mobile 4 5 to 40 NA8 8 to 90 NA8 28 Special Product specifications are controlled by contract or other requirements. Rate of chg (ºC/hr, max) 5 5 NA8 NA8 NA8 NA8 1 The maximum elevation for all operating environmental classes is 3050 m. 2 Dry bulb temperature is the regular ambient temperature. Derate maximum dry bulb temperature 1ºC/300 m above 900 m. 3 The values in each row meet or exceed the stated industry equivalent class specifications. 4 With installed media, the minimum temperature is 10ºC and maximum relative humidity is limited to 80%. Specific media requirements may vary. 5 Allowable: equipment design extremes as measured at the equipment inlet. 6 Recommended: target facility design and operational range. 7 Must be noncondensing environment. 8 Local product groups must make business decisions for the appropriate values. The operating temperature inside the rack is always higher than the room temperature and is dependent on the configuration of equipment in the rack. Check the TMRA for each piece of equipment before installation. CAUTION: To reduce the risk of damage to the equipment when installing third-party options: • Do not permit optional equipment to impede airflow around the chassis or to increase the internal rack temperature beyond the maximum allowable limits. • Do not exceed the manufacturer's TMRA. Airflow requirements HP rack-mountable products typically draw in cool air through the front and exhaust warm air out through the rear of the rack. The front door of the rack must be ventilated adequately to enable ambient room air to enter the rack with as little restriction as possible. Likewise, the rear door must offer as little restriction as possible to the warm air escaping from the rack. Environmental requirements 10