Instruction book
52
909935AIB
Drawing
reference
Description
(6)
Notations
(7)
Motor ventilation / Outlet of cooling air
(8)
Inlet of cooling air
(9)
Inlet of compressor air
(10)
Inlet of cooling air of the motor
(11)
Inlet of cooling air
(12)
Ducts should be fixed within the area indicated by…
Description
The numbers mentioned in the table below refer to the balloon references in the installation
proposal drawing.
Balloon
reference
Description
1
The compressor should be installed on a levelled floor capable of carrying the weight of
the compressor.
2
An outlet valve (to isolate the compressor from the air net) is not included in the delivery.
3
The maximum total length of the air delivery pipe can be calculated as follows:
For SI Units:
L
max
= (dp x d
5
x p) / (450 x Qc
1.85
)
d = Inner diameter of the outlet pipe in mm
dp = Pressure drop (recommended maximum = 0.1 bar)
L = Length of outlet pipe in m
p = Absolute pressure at the compressor outlet in bar(a)
Q
c
= Air flow (FAD) of the compressor in l/s
The connection of the compressor air outlet pipe should be 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 is avoided. The maximum air velocity
through the grids is 5 m/s (16.5 ft/s).
The required ventilation to limit the compressor room temperature can be calculated as
follows:
For SI Units:
On air-cooled compressors: Qv = 0.92 N/dT
Qv = Required ventilation capacity in m
3
/s
N = Shaft input of compressor in kW (for Pack compressors)
dT = Temperature increase in compressor room
If cooling air ducts are installed, the maximum allowable pressure drop over all cooling
air ducts together is 30 Pa. ( 4.35 x 10
-3
psi)
The maximum air temperature at the compressor intake opening is 46 °C (114.8 °F) (55
°C (131 °F) for HAT version), minimum 0 °C (32 °F).
5
The drain pipes are guided to the condensate collector. They may not enter the
collector. Free, atmospheric outlet should be allowed. Individual drain pipes may not be
interconnected, to avoid interference. Compressor condensate contains oil. Depending
on local legislation it is recommended to install an oil/water separator, consult Chicago
Pneumatic.