Liebert CHALLENGER 3000 - Manual (Page 16)

Operation with Advanced Microprocessor Controls
8
Table 2 lists the setup functions, their factory default values and the allowable programming ranges.
Select Options
The following table lists options which should match the options installed with your unit and should
not need to be changed during normal operation.
Calibrate Sensors
The temperature and humidity sensors can be calibrated by selecting this menu item. “SENSOR”
shows the actual sensor reading or raw reading. “CALIBRATED” shows the sensor reading after the
calibration offset has been added. The temperature sensor can be calibrated ±5 degrees Fahrenheit
and the humidity sensor can be calibrated ±10%RH. When calibrating the humidity sensor, the value
shown will always be % RH, even though absolute humidity control may be selected. If absolute
humidity control is selected, the Normal Status Display will display the adjusted reading and may not
agree with the relative humidity reading displayed while in calibration.
Show DIP Switches
The DIP switch settings can be reviewed from the display panel. Changing the DIP switches requires
opening the upper panel for access to the DIP switches on the microprocessor control board.
The selections shown in Table 4 should match options installed on your unit and should not need to
change during normal operation. Switches 1 through 7 are self explanatory. DIP switch 8, not shown in the
table, enables the password feature when set to ON and disables the password feature when set to OFF.
Table 2 Setup functions, default values and ranges
Function Default Range
Cold Start Time Delay* 3 0 to 3 min (0 = no delay)
Restart Time Delay 0.1 0 to 9.9 min (0 = manual restart)
Infrared Fill Rate 150 110 to 500%
Chilled/Hot Water Coil Flush 24 0 to 99 hrs (also Econ-O-Coil)
C/F Degrees F C or F
*Factory set to 0 for water cooled, glycol, and GLYCOOL units.
Table 3 Unit options
Option Selection
Heating 1 Yes or No
Humidifier Yes or No
Dehumidifier Yes or No
Hot Gas Reheat 2 Yes or No
Heat Stages 3 2
1 Heating cannot be disabled on units with SCR reheats.
2 Hot gas reheat not available on units with SCR reheats.
3 Heat stages not selectable on units with SCR reheats.
NOTE
Power MUST be cycled OFF, then ON from the unit disconnect switch for the control
system to update the DIP switch settings (with the exception of switch 8).
Table 4 DIP switch settings
Switch # Off On
1 No Part Coil Part Coil/Chilled Water
2 Electric/Hot Gas Reheat Hot Water Reheat
3 All Not Used
4 No GLYCOOL GLYCOOL
5 No Dual Cooling Dual Cooling
6 Not Used Not Used
7 a Tight Control Standard Control
a SCR reheats only (with special software); otherwise, not used.