Instruction book
1904 0504 83
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1 Install the compressor unit on a solid, level floor suitable for taking the weight.
2 Position of the compressed air outlet valve.
3
The pressure drop over the air delivery pipe can be calculated from:
ǻp = (L x 450 x Qc
1.85
) / (d5 x P), with
d = inner diameter of the pipe in mm
ǻp = pressure drop in bar (recommended maximum: 0.1 bar (1.5 psi))
L = length of the pipe in m
P = absolute pressure at the compressor outlet in bar(a)
Qc = free air delivery of the compressor in l/s
It is recommended that the connection of the compressor air outlet pipe is made on top
of the main air net pipe in order to minimize carry-over of possible condensate residue.
4
Ventilation: the inlet grids and ventilation fan should be installed in such a way that any
recirculation
of cooling air to the compressor or dryer is avoided. The maximum air velocity through
the grids is
5 m/s (16.5 ft/s).
The maximum allowed pressure drop in ventilation ducts before or after the compressor
is 30 Pa.
The maximum air temperature at the compressor intake is 46 ˚C (115 ˚F), the minimum
temperature
is 0 ˚C (32 ˚F).
• For air-cooled compressors and ventilation alternatives 1 and 3, the ventilation
capacity
required to limit the compressor room temperature can be calculated as follows:
• For compressors without dryer:
Qv = 1.06 N/ǻT
• For compressors with dryer:
Qv = (1.06 N + 1.2 D)/ǻT
with
Qv = required ventilation capacity in m3/s
N = nominal power of the compressor motor in kW
D = electric power of the dryer in kW
ǻT = temperature increase in the compressor room in °C
For ventilation alternatives 2 and 4: the fan capacity should match the compressor fan
capacity at a pressure head equal to the pressure drop over the air ducts.
• For water-cooled compressors, the ventilation capacity required to limit the
compressor
room temperature can be calculated from:
• For compressors without dryer:
Qv = 0.13 N/ǻT
• For compressors with dryer:
Qv = (0.13 N + 1.2 D)/ǻT
with
Qv = required ventilation capacity in m3/s
N = nominal power of the compressor motor in kW
D = electric power of the dryer in kW
ǻT = temperature increase in the compressor room in °C
The cooling air of the dryer can be ducted outside
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