Operation; General Functions - Sullair SR 250 Manual De Uso

Code: 02250145- - 604 SR- - 250 --- SR- - 3000
4.2

Operation

a) Startup and shutdown
Turn the main switch to position I (yellow "power on" LED lit). The unit can
be started up pressing the on off key, with a delay of 6 seconds. During this
delay the green LED "dryer on" flashes.
b) Remote on off
When the unit has been operating for 5 minutes it can be switched off using the
remote control (the remote on/off and its connection are at the customer's
expense). Operation of the unit depends on the state of the remote contact (see
terminal 16 and 2 in wiring diagram).
contact open = unit off;
contact closed = unit on.
If the on/off button on the control panel is pressed when the unit is working, the
unit will SHUT DOWN (regardless of the remote signal).
c) Warning/alarm contact (voltage free)
Operation of the digital warning or alarm output (terminals 32, 33 on the wiring
diagram), which can be used with a maximum voltage of 250V and a maximum
current of 1A, depends on the setting of the "rL " parameter (alarm relay polarity)
as in the table below:
rL Parameter Contact State
Closed
on
Open
Closed
oF
Open
d) Adjustment of the high dew point temperature warning threshold
A high dew point temperature warning function is available. If, during operation,
the dew point temperature remains above the alarm threshold (Ht parameter)
for more than three minutes, the alarm relay is activated to indicate the anomaly.
The warning is automatically cancelled when the dew point temperature falls
3.6˚F (2˚C) below the set warning threshold.
e) "ENERGY SAVING" function (CM)
The CM function enables the exchanger temperature to be kept at a value bet-
ween tA (minimum) and tb (maximum) by switching on/switching off the fridge
compressor.
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Meaning
No alarm.
Alarm/Warning in progress or no vol-
tage to dryer.
Alarm/Warning in progress.
No Alarm/Warning in progress or no
voltage to dryer.
Activation of the CM function is only possible with the tC parameter set to "on"
during activation of the remote off (see table).
Remote off State of "tC"
contact parameter
tC = oF
Contact open Contact open
tC = on
tC = oF
Contact closed Contact closed
tC = on
S S S S tA: temperature at which fridge compressor is switched off;
S S S S tb: temperature at which fridge compressor is switched on;
S S S S tC: enabling/disabling of the cold mass mode as indicated in the table.
4.3

General functions

MANAGEMENT REPORT and HOUR METER
N.B.: The REPORT/HOUR METER option is only active with the dryer powered
up ("power on" lit).
Pressing the reset/report key for 6 seconds accesses the Reset/Report function (the
initials "rE" appear on the display). The last 8 alarms and/or warnings and the fridge
compressor's running hours will be shown.
a) Pressing the key it is possible to scroll through the last 8 events in chronologi-
cal order:
1 --- --- --- last event --- --- ---
2 --- --- --- penultimate event --- --- ---
3 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
8 --- --- --- eighth event --- --- ---
b) Pressing the reset/report key will show the fridge compressor's running hours.
99.999 working hours are recorded. The working hours are shown in three diffe-
rent screens at intervals of two seconds:
--- First screen:
the THOUSANDS are shown and the red alarm LED flashes simultaneously.
--- Second screen:
the HUNDREDS are shown and the yellow remote off LED flashes simulta-
neously.
6 6
English
Meaning
Fridge compressor always off.
CM = active.
Fridge compressor always operating. Fridge compressor always operating