Atlas Copco SF 1 Instruction Book page 22

Recommendations
1. Install the compressor on a level horizontal industrial floor, suitable for taking the weight of the
compressor. The location must be frost-free and preferably low dust location. The compressor unit
must be installed on a level floor.
2. Delivery pipe. The pressure drop in the delivery pipe can be calculated from:
Δp = (L x 450 x Q
d = inner diameter of the pipe in mm
Δp = 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
Q = free air delivery of the compressor in l/s
c
3. Ventilation: the inlet grids and ventilation fan should be installed in such a way that any recirculation
of cooling air to the compressor is avoided. The maximum air velocity through the grids is 5 m/s
(16.5 ft/s). The maximum allowable pressure drop over the cooling air ducts is 30 Pa (0.12 in wc).
The maximum air temperature at the compressor intake opening is 40 ˚C (104 ˚F).
Take care that the temperature of the ambient air and the cooling air may never be lower than
0 °C (32 °F) to avoid freezing of condensate.
.
The required ventilation capacity to limit the compressor room temperature can be calculated
from:
• Q = 1.06 N/Δt for compressors without integrated dryer.
v
• Q = (1.06 N + 0.2)/Δt for compressors with integrated dryer.
v
with
Q = required ventilation capacity in m
v
N = shaft input of the compressor in kW
Δt = temperature increase in the compressor room in °C
4. Air receiver: an optional air receiver can be necessary to limit the cycle frequency. Recommended
maximum is 20 starts per hour.
5. Optional filters can be installed in the pressure line downstream the air outlet valve, e.g.:
• A DD
• A PD
downstream a DD filter.
6. Control cubicle with monitoring panel.
7. Compressor and dryer cooling air outlet
8. Compressor cooling air inlet
9. Refrigerant dryer cooling air inlet
10. Connect condensate drain outlet to a sewer. It is recommended to provide a funnel to allow visual
inspection of the condensate flow. If the condensate piping has been led outside the compressor room
where it may be exposed to freezing temperatures, the piping must be insulated. The condensate drain
pipe from the compressor to the sewer must not dip into the water of the sewer.
11. All piping to be connected free of stress.
20
1.85 5
) / (d x P), with
c
+
filter for general purpose filtration. The filter traps solid particles down to 1 micron.
+
filter for filtration down to 0.01 micron. A PD filter must always be installed
3
/s
Instruction book
2920 7110 11