7311 Model D20 
 
Dimensions 
Height  178 mm (7.0 in) 
Width  445 mm (17.5 in) 
Depth  610 mm (24.0 in) 
Weight  45.9 kg (101 lbs) 
Electrical    
Power source loading (max.)  0.358 kVA 
Voltage range  100 to 240 V ac, V dc not supported 
Frequency  50 or 60 Hz 
Thermal output (typical)  774 Btu/hr 
Thermal output (max.)  1161 Btu/hr 
Power requirements (typical)  227 watts 
Power requirements (max.)  340 watts 
Power factor  0.91 
Inrush current²  60 amps 
Maximum altitude
3, 4 
3048 m (10000 ft.) 
Temperature Requirements³  Operating
5 to 35°C
41 to 95°F)
 
Non-Operating
1 to 60°C
(34 to 140°F)
 
Storage
1 to 60°C
(34 to 140°F)
 
Humidity Requirements⁴  Operating  Non-Operating  Storage 
(Noncondensing)  8 to 80%  8 to 80%  5 to 80% 
Wet Bulb  23°C (73°F)  27°C (81°F)  29°C (84°F) 
Noise Emissions
1, 5 
Operating  Idle 
L
WAd 
6.1 bels  6.0 bels 
<L
pA
>
m 
44 dBA  43 dBA 
Install/Air Flow  Maintenance of service clearance will allow proper air flow. 
Service Clearances  See “T00 and T42 Service Clearances and Caster Location” on page 33 for 
T00 or T42 rack service clearances.
 
1.    See “Noise Emission Notes” on page 336 for definitions of noise emissions positions. See noise emissions note 
4. 
2.    Inrush currents occur only at initial application of power, no inrush occurs during normal power off-on cycle. 
3.    The upper limit of the dry bulb temperature must be derated 1° C per 137 m (450 ft.) above 915 m (3000 ft.). 
4.    The upper limit of the wet bulb temperature must be derated 1°C per 274 m (900 ft. ) above 305 m (1000 ft.).
 
 
 
 
210  Site and Hardware Planning Information