Redi Controls Redi-Purge PRG-113-C3, Installation, Operation & Maintenance Manual, Page: 27 / 68

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Use the cursor movement keypad switches “<“ and “>“ to move the cursor beneath the
position you want to change. Use the numbered keypad switches to enter the desired val ue,
then press the ENTER key. To change another operational parameter SCROLL to the
appropriate display. To EXIT the SETTINGS mode press the STOP key.
Turn Dip switch
S1-position 4 to the “OFF” position . Now select one of the three operating modes.
NOTE: When an entered value either exceeds the maximum allowable parameter, or is
lower than the minimum allowable parameter for any setting an “Error Value”
message will be displayed. The purge unit’s microprocessor will then override
the errant value and automatically assign the appropriate default value.
To activate the Fault Bypass mode while in one of the three operating modes press the “Fault
BYPASS” keypad switch. The Fault “BYPASS” mode can be exited at any time by again
pressing the Fault “BYPASS” Switch.
Drain Cycle setting
(sets LS1 liquid level switch make/break hysterisis)
Switch Dip Switch S1-position 4 to the “ON” position.
Verify drain-back cycle for proper operation. With the purge unit operating, verify the purge
tank for proper condensing activity by observing the purge tank liquid level sight glass. Liquid
should accumulate until the liquid level reaches the top of the purge tank sight glass. At this
point, liquid level switch LS1 contacts should close and energize drain -back solenoid valve L3
allowing refrigerant to drain back to the chiller. The liquid level should drop until it reaches
the bottom of the sight glass, at which time the microprocessor should de -energize drain
solenoid valve L3.
To set the Drain Cycle time press the “SETTINGS” keypad switch and scroll the display using
the SCROLL key until the display reads:
Display changes to:
Enter DRAIN cyc.
Time Sec. : 010
(maximum setting 20 seconds)
(minimum setting 1 second)
(Default Setting 10 seconds)
Use the cursor movement keypad switches “<“ and “>“ to move the cursor beneath the
position you want to change. Use the numbered keypad switches to enter the desired value,
then press the ENTER key. To change another operational parameter SCROLL to the
appropriate display. To EXIT the SETTINGS mode press the STOP key.
Turn Dip switch S1-
position 4 to the “OFF” position . Now select one of the three operating modes.
NOTE: When an entered value either exceeds the maximum allowable parameter, or is
lower than the minimum allowable parameter for any setting an “Error Value”
message will be displayed. The purge unit’s microprocessor will then override
the errant value and automatically assign the appropriate default value.