SRC Service Manual
Revision 02
Aug 2007
9. Condensate Drain Operation
9.1 SRC-150 to 200
The SRC-150 through have a timed solenoid condensate drain located in an externally accessible
drain compartment. It is controlled by interval and duration settings adjustable on the drain itself. It is
wired into the electrical box on the dryer to provide power.
9.2 SRC-250
to
325
The SRC-250 & 325 have a solenoid valve (coil YV1) that is controlled as a timed drain by the
microprocessor on the dryer. The user can adjust the operation of the drain by changing User
Parameters D1 (Interval) and D2 (Duration) on the dryers control panel. See Section 5.3.7 for further
information on accessing and adjusting User Parameters.
Parameters
Units
Min
Max
Default
D1
Drain Duration (Time open)*
sec
1
60
5
D2
Drain Interval (Time closed)*
sec
1
900
120
9.3 SRC-400
to
1000
The SRC-400 through 1000 have a solenoid valve that is controlled as a
zero air loss drain by the microprocessor on the dryer. Factory
Parameters D4 through D8 control the operation to ensure zero air loss
operation. (Note: Factory Parameters are locked and should NOT be
adjusted.)
Parameters
Units
Min
Max
Default
D4
Drain Open Delay*
sec
0
900
60
D5
Drain Close Delay (Normal Cycle)*
sec 0
120 5
D6
Drain Close Delay (Extended Cycle)*
sec
0
300
10
D7
Extended Cycle Interval*
-
0
900 100
D8
Drain Alarm Setting*
sec
10
900
30
Condensate collects in the Condensate Chamber (2.4.4). The Level Sensor (2.4.6) continuously
monitors the level of condensate, closing the contacts and sending a signal to the microprocessor
(digital input ID4) when it senses liquid.
The microprocessor opens the solenoid drain valve (coil YV1) when it gets a signal from the Level
Sensor continuously for 30 seconds (Parameter D4 – Drain Open Delay).
The condensate is then discharged from the Condensate Chamber through the solenoid drain valve
under pressure.
The microprocessor closes the solenoid drain valve when it stops getting a signal from the level
Sensor continuously for 5 seconds (Parameter D5 – Drain Close Delay).
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