Product Manual

Q
c
= Free air delivery of the compressor in l/s
4.
Ventilation: The inlet grid(s) and ventilation fan should be installed in such a way that any
recirculation of hot cooling air to the inlet gratings of the compressor/dryer is avoided.
The air velocity to the grid(s) has to be limited to 5 m/s (16.5 ft/s).
Maximum allowable pressure drop over cooling air ducts is 50 Pa (0.12 in WC).
When 50 Pa is exceeded, a ventilation fan is needed at the outlet of the cooling air ducts.
The maximum air temperature at the compressor intake opening is 40° C (104 °F), the
minimum is 0° C (32 °F).
Alternative 1 and 3: The required ventilation to limit the compressor room temperature can
be calculated from :
Q
v
= 0,92 N /Δt
with
Q
v
= required ventilation capacity in m
3
/s
N = nominal motor power of the compressor in kW
Δt = temperature increase in the compressor room in °C
Alternative 2 and 4: The fan capacity should match the compressor fan capacity at a
pressure head equal to the pressure drop caused by the cooling air ducts.
5. Control cubicle with monitoring panel.
6. Mains cable entry.
7. Optional filters can be installed in the pressure line downstream the air outlet valve,
e.g.:
• A DD filter for general purpose filtration. The filter traps solid particles down to 1 micron.
• A PD filter for filtration down to 0.01 micron. A PD filter must always be installed
downstream a DD filter.
It is recommended to provide bypass pipes and valves across the filters in order to isolate
the filters during maintenance without disturbing the compressed air delivery.
8. Safety valve.
9. The drain pipes to the drain must not dip into the water.
10. Compressor cooling air outlet.
11. Ventilation outlet
12. Aftercooler and dryer cooling air outlet.
13. Data plate.
4.3 Electrical connections
Attention
The electrical installation must correspond to the local codes. The mains supply and
earthing lines must be of suitable size.
The installation must be earthed and protected by fuses in each phase. An isolating
switch should be installed near the compressor.
Make sure that this switch is open to isolate the compressor from the mains
before carrying out any connection.
To preserve the protection degree of the electric cubicle and to protect its components
from dust from the environment, it is mandatory to use a proper cable gland when
connecting the supply cable to the compressor.
Supply cable
Consult section Electric cable size and fuses
for the section of the power supply cable.
Instruction book
78 2920 7140 52