Table 58. Environment requirements
1
Environment Recommended operating Allowable operating Nonoperating
ASHRAE class A3
Airflow direction Front-to-back
Temperature
2
18°C - 27°C (64°F - 80°F) 5°C - 40°C (41°F - 104°F) 1°C - 60°C (34°F - 140°F)
Humidity range 5.5°C (42°F) dew point
(DP) to 60% relative
humidity (RH) and 15°C
(59°F) dew point
-12.0°C (10.4°F) DP and
8% - 80% RH
8% - 80% RH
Maximum dew point 24°C (75°F) 27°C (80°F)
Maximum operating
altitude
3050 m (10000 ft)
Shipping temperature -40°C to 60°C (-40°F to
140°F)
Shipping relative humidity 5% - 100%
1. The nal ASHRAE class is determined by the hardware that is installed in the rack. Individual specications
for each piece of hardware must be reviewed.
2. Derate maximum allowable dry-bulb temperature 1°C per 175 m above 950 m. IBM recommends a
temperature range of 18°C - 27°C (64°F - 80.6°F).
Table 59. Service clearances
Front
1
Back
915 mm (36 in.) 915 mm (36 in.)
1
Storage racks require larger service clearances in the front of the rack.
Rear door heat exchanger
Specications for Power orderable feature code (FC) EC05 (Rear door heat exchanger indicator (Model
1164-95X)).
Table 60. Dimensions for rear door heat exchanger
Width Depth Height Weight (empty) Weight (lled)
600 mm (23.6 in.) 129 mm (5.0 in.) 1950 mm (76.8 in.) 39 kg (85 lb) 48 kg (105 lb)
For more information, see “Model 1164-95X rear door heat exchanger” on page 47.
Electrical
For electrical requirements, see Power distribution unit and power cord options.
Floor cutout
Racks with water hoses and power cords that exit from the bottom of the rack require a floor tile cutout of
at least 30.48 cm (12 in.) long by 22.86 cm (9 in.) wide. Due to the hose bend radii, the hole must be
positioned towards the side of the rack without the manifold (the left side of the rack when looking at the
rear of the rack). The left edge of the hole must be at least 11.43 cm (4.5 in.) from the side and 3.81 cm
(1.5 in.) from the back edge of the rack (not including doors). Hole placement on the tile depends on the
location of the rack, tile size, and tile load limitations.
Site and hardware planning
53
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