2. Make sure that the machine and exhaust fan can only operate when the inlet aperture is ac‐
tually open.
3. Keep the inlet and exhaust apertures free of obstructions so that the cooling air can flow freely
through the room.
4. Ensure clean air in order to support the proper functioning of the machine.
5.2.3 Exhaust duct design
The machine can only overcome the air resistance at the cooling air inlet and exhaust determined
by the duct design. Any additional air resistance will reduce airflow and deteriorate machine cool‐
ing.
➤ Consult the KAESER service representative before deciding on:
■ the design of the exhaust air ducting
■ the intersection between the machine and the exhaust air duct
■ the length of the ducting
■ the number of duct bends
■ the design of flaps or shutters
5.3 Operating the machine in a compressed gas network
High pressure side
If the compressor is integrated in a gas network the pressure side may not exceed 17 bar (a).
Initial filling of a fully vented gas network generally creates very a high rate of flow through treat‐
ment devices. These devices cannot function correctly under such conditions and compressed gas
quality suffers.
Gas inlet side
The compressor is designed for inlet pressures between 1.05 ± 0.05 bar (a). When starting, a
maximum inlet pressure of ≤ 2.5 bar (a) can be tolerated for a short period (5 - 10 minutes).
Inlet pressure monitoring is the responsibility of the user.
➤ The manufacturer must be consulted if higher inlet pressures are to be conditioned.
5 Installation and Operating Conditions
5.3 Operating the machine in a compressed gas network
ESD_2C_10357405_10–LIN_00 E
Service Manual Screw Compressor
ESD 442/14 bar (abs) SFC SIGMA CONTROL 2
35
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