Liebert Refrigerant Distribution Unit XDP - Manual (Page 29)

Microprocessor Control
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4.3.6 TIME
To change the time, press ENTER to select the function, then use the Up or Down arrow key to
change the first character, press ENTER to store, then press the Up or Down arrow key to change the
second character, press ENTER to store, etc.
4.3.7 DATE
To change the date, press ENTER, then use the Up or Down arrow key to change the first character,
press ENTER to store, press the Up or Down arrow key to change the second character, etc.
4.3.8 SETUP OPERATION
Selecting Setpoint/Setup from the Main Menu will display the following selections:
Use the Up and Down arrow keys to scroll through the submenu, then press the ENTER button to access
a function. To make changes or review the current setting, see 4.3.1 - Viewing or Changing Settings.
RESTART TIME DELAY
This function specifies the time for the unit to restart after main power is restored to the unit. If sev-
eral systems are operating, the time delays should be set to different values to cause a sequential
start. Delay can be set from 0.1 minutes (6 seconds) to 9.9 minutes. Setting the value to “NO!” will
prevent the unit from restarting when power is restored. In this case, the unit must be restarted man-
ually by pressing the “On/Off” key.
To make changes or review the current setting, see 4.3.1 - Viewing or Changing Settings.
C/F DEGREES
The control can be selected to show readings and setpoints in either degrees Fahrenheit (F) or
Celsius (C). To make changes or review the setting, see 4.3.1 - Viewing or Changing Settings.
PUMP START TD
The user may set a pump start time delay (in seconds) to ensure that refrigerant begins flowing when
the pump starts. If refrigerant does not begin flowing before this delay expires, the pump will stop for
a period that the user may also specify (see PUMP OFF TD). After this delay, the pump will again
begin its startup sequence.
To make changes or review the current setting, see 4.3.1 - Viewing or Changing Settings.
NOTE
The clock uses the 24-hour system (for example, 17:00 would be 5:00 PM). The date and time
are kept current even when the control board is not powered.
NOTE
None of these setpoints should be changed before consulting an Emerson Network Power
representative. Changing any of these setpoints could drastically affect the system.
Table 14 Setup operation functions default values and allowable ranges.
Menu Item Function Default Range
RESTART Restart time delay 0.1 min
0 to 9.9 min
(0 = manual restart)
C/F DEGREES Celsius or Fahrenheit F C or F
PUMP START TD Pump start time delay 10 sec 3 - 120 sec
PUMP WAIT TD Pump wait time delay 10 sec 3 - 120 sec
PUMP OFF TD Pump off time delay 5 sec 5 - 120 sec
LEAD PUMP Lead Pump Pump 1 Pump 1 / Pump 2
DIPSWCH DIP switch status NA NA
VALVE TIME Control valve travel time 60 sec 50 - 250 sec
NOTE
Setpoints and system setup parameters are kept in non-volatile memory.