Refrigeration Unit; Heater Battery; Thermal Sensor After Cooler; Safety Temperature Limiter - BÖWE M21 Instruction Manual

7. Functional Units

7.12.2 Refrigeration Unit:

Refrigeration technology is used to cool the air cooler in the airshaft and to cool the solvent.
The low aftercooler temperature of the air cooler reduces the solvent residue concentration in the
cage and the solvent emissions.
The heated gas that arises in the cooling compressor (heat pump principle) is fed through the pre-
heater. The energy consumed for drying is considerably reduced because the thermal energy is fed
back.
The air cooler is specially coated as protection against corrosion.

7.12.3 Heater Battery:

The drying air is heated up in the heater battery. The heater battery is fed either by external steam or by
the small electric steam generator (only at M21) that is integrated in the machine.

7.12.4 Thermal Sensor After Cooler:

A thermal sensor regulates the aftercooler temperature.

7.12.5 Safety Temperature Limiter:

In addition, an independent safety temperature limiter is built in after the cooler, in order to monitor the
function of the cooler. It is set to a maximum temperature. When the temperature reaches this level, the
machine switches off.
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M21-M26-M30