SRC Service Manual
Revision 02
Aug 2007
9.4 Drain Operating Mode (Parameter D3)
Parameter D3 changes the operating mode of the condensate drain. There are 3 settings available for
this parameter:
Capacitive (Zero Air Loss): The drain solenoid valve (output YV1) is controlled by the
level sensor (input ID4) found inside the integrated condensate chamber. (SR-400 to
1000 ONLY)*
Timed: The drain solenoid valve (output YV1) is controlled by the duration and interval
settings in Parameters D1 & D2.
Continuous (Deactivated): For use when customer prefers to install a separate self
controlled external drain. (Signal to open N03 is always activated - even if the dryer is
off.)
*Note: Since the SR-250 & 325 have no level sensor, if the “Capacitive” mode was set on
one of these models, the microprocessor would get no signal to open, and would keep
the valve closed permanently.
Note that when the drain is set to Continuous (Deactivated) Mode, the drain solenoid valve
must be removed and an external self controlled condensate drain must be installed. The
external drain can be powered through the board output NO3 (24V) or directly from the
electrical cabinet.
9.5 Manual
Drain
Activation
When set in either Capacitive or Timed mode, the drain valve can be manually activated by
pressing the Drain Button. When the button is pressed the solenoid valve coil is energized
for the duration time set in parameter D1. The manual drain activation is always possible no
matter what the dryer status or signal coming from the level sensor.
If you press the Drain Button while the drain is activated by the controller, it will cause the drain valve
to close.
For further information on the Drain LED and Drain Button, please refer to Sections 4.3.4.1 & 4.3.4.2.
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