Drying Controller (Volume Drystat) - BÖWE M21 Instruction Manual

7. Functional Units

7.13 Drying Controller (Volume Drystat)

The drying controller is in the solvent drain line from the air duct to the extraction tank. It consists of a
valve and a sight-glass with built-in level sensor, positioned above the valve.
The drying controller determines the amount of recovery to be expected in a predefined period of time.
If this particular level of recovery is no longer attained during the predefined time period, the garments
are dry.
The valve closes after the end of the specified drying time. The recovery causes the volume
(measurement chamber) between the valve and sensor to fill.
When the filling level has been reached, the sensor opens the valve and the solvent drains into the
extraction tank. This process repeats until the filling time (adjustable in the specification code) is
exceeded.
The programme enters the post-drying phase, when additionally a certain temperature is reached.
The measurement chamber must empty within a specific time. If this time is exceeded, an error message
is displayed and the machine switches to the malfunction state.
Note the diagnostic message!
A = solvent feed from air duct
B = solvent drain to extraction tank
1 = level sensor
2 = solvent level
35
3 = measurement chamber (sight-glass)
4 = valve
7.
7.13
707760-03-0
M21-M26-M30