MEGA SD - Cod.197DD8100
GB
START-Up AND OpERATION
• Pressures
MAX, OPErATING PrESS:.
The pressure above which the compressor starts to idle. The rated pressure of the machine
represents the upper limit of this value.
MIN OPErATING PrESS.:
The pressure below which the compressor restarts operation at full load (supply of compressed air)
or at which it restarts if it has stopped at the end of unload run (no supply of air). This value must be set so that the minimum
supply pressure to the pneumatic service points is guaranteed, taking into account losses of head of the distribution system. The
minimum pressure value cannot be close to the maximum pressure by more than the factory setting (minimum difference).
• Timings
UNLOAD rUN TIME:
This setting defines the time during which the compressor idles when there is no demand for air from the
network. At the end of this period, the compressor stops and is ready to start again when network pressure has dropped below
the minimum threshold value.
This parameter is effective only if operating mode has been set to AUTOMATIC (see paragraph 4.2.3).
This parameter must be optimized according to the consumption trend of the network and its accumulation capacity.
In the case of Iow consumption and if it is seen that the compressor remains inactive for long periods (motor stopped),
it is advisable to reduce idling time so as to restrict power consumption during the inattive phases to a minimum.
Low air consumption will also assure a Iimited number of automatic start-up operations of the compressor, thus
promoting a further reduction in power consumption.
If air consumption is consistent and lor characterized by major variations, it is advisable to extend the idling time
in order to “offset”, through the periods of idling, the various periods of operation at full load: this avoid stopping
of the compressor with con sequent delays in the supplier of compressed air due to the start-up phases which are
characterized by current take-off peaks tied to frequent starting.
