DA Series
Operation Manual
6
Fig. 3.2
Note:
(1)
Fig. A: when the exhaust duct is not used for ventilation, refer to Table 3.1 Ventilation Rate (1) for the
recommended exhaust air rate of ventilating fans, and please install the ventilating fans as high as
possible.
(2)
Fig. B: While using exhaust duct without installing the ventilating fans, the exhaust air rate of
the compressor and the pressure loss in the exhaust duct shall be calculated. When the pressure
loss is less than 20Pa, there is no need to install ventilating fans and the dismountable exhaust air
hose shall be directly installed at the air outlet of the compressor.(It is recommended that
customers should use the ventilation design of Fig. A and Fig. C best).
(3)
Fig. C: When the pressure loss in the exhaust duct is greater than 20Pa, ventilating fans
shall be installed additionally where the distance between the exhaust duct and the air
outlet of the compressor shall be 200-300mm. Refer to Table 3.1 Ventilation Rate (2) for the
recommended exhaust air rate of ventilating fans. Pay attention to the exhaust air rate and
such conditions as the pressure loss in the exhaust duct and exhaust temperature increase
while choosing ventilating fans.
3.4 Selection Requirements for Air Rate of Ventilating fans
Table 3.1
Cooling method of the unit
Air cooling
Motor power of the unit
(KW)
5.5
7.5
11
15
18
22
30
37
45
55
75
Exhaust air rate (1)
(m3/min)
95
95
140
180
225
270
360
450
540
540
900
Exhaust air rate (2)
(m3/min)
50
50
50
90
90
170
170
170
240
240
340