Start-up
A190-930TX_EN_03_ 2009-02-06 31
Setting times of the operating phases
In its standard version the dryer is delivered with a time-dependent control
system. The phase sequence occurs in a fixed cycle.
With the optional dewpoint-sensing control, the dryer can also be operated at
variable cycles (depending on the dewpoint).
The following table provides information on the duration of the individual phases.
Phase duration Fixed cycle Variable cycle
Adsorption 5 min 60 min, maximum
Regeneration, total 5 min 5 min
− of which: expansion time
~ 0.2 min ~ 0.2 min
− of which: dehumidification time
~ 4 min ~ 4 min
− of which: pressure build-up
~ 1 min ~ 1 min
Standby — ~ 55 min, maximum
Overview of operating and control elements
ON/OFF switch
The ON/OFF switch (2) is located to the side of the control cabinet and above the
mains plug (1, see figure):
If it is set to 0, the power supply is disconnected and the dryer is switched off.
The expansion valves are normally closed.
If the switch is set to I, the dryer is switched
on and begins to operate in fixed cycle mode
(i.e. time-controlled).
If the switch is set to position II, the dryer is
switched on and begins to operate
— with compressor synchronisation
— in variable cycle mode (i.e. dew-point-
controlled).
Position II is only relevant for operation with
the optional compressor synchronisation
and/or dewpoint-sensing control.
Control cabinet with ON/OFF switch
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