2 Machine description
2 - 8
2.3 Compressor unit
(continued)
Electric motor (item 8)
The electric motor (from 1.5 to 7.5 kW) drives the compressor
using the corresponding transmissionby using one or two drive
belt(s).
Discharge pressure switch (electric)
The pressure switch is connected to the compressed air outlet
of the system. It controls the on and off switching of the com-
pressor, depending on the set end-pressure. The values for p
max
and p
min
are set at the pressure switch: p
max
: upper limit of oper-
ating pressure at which the unit cuts out in normal mode. P
min
:
lower limit of operating pressure at which the unit cuts in again
in normal mode.
The pressure switch is adjusted to the correct setting at the fac-
tory. The pressure switch may only be adjusted by personnel
authorised by the manufacturer!
Combistat (item 11)
The Combistat is a temperature indicator and control unit. It is
integrated in the instrument panel. It monitors the permitted
maximum operating temperature of the system (red marking).
When this temperature is reached the circuit is broken and the
unit cuts out automatically. The line (capillary) connecting the
Combistat to the compressor unit must not be kinked as this will
break the contact.
Safety valve
The safety valve is installed after the cooler. It limits the maxi-
mum pressure occurring in the unit to 1-2 bar above the rele-
vant operating pressure (end pressure). The safety valve blows
off if the end pressure is exceeded due to a fault in the system.
Description
aggregate
components
Summary of Contents for Scroll Line Industry Series
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