Emerson Liebert Deluxe System/3 DH - Manual (Page 17)

Advanced Microprocessor Controls Setup
9
Select Options
The following table lists choices on the Select Options menu. These should match the options installed
with your unit and should not need to change 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.
These selections should match options installed on your unit and should not need to change during
normal operation. Switches 1 through 6 are self-explanatory. Switch 7 is described in more detail
below. DIP switch 8, not shown above, enables the password feature when set to ON and disables the
password feature if set to OFF.
Table 3 Select options
Option Selection
Heating Yes or No
Humidifier Yes or No
Dehumidifier Yes or No
Humidifier Pan Small or Large
Hot Gas Reheat Yes or No
Heat Stages* 2 or 3
Dehumidification Stages 1 or 2
*If heat stage is set to 2 on a chilled water unit, the
reheat 3 output is energized on a call for dehumidification.
NOTE
Power must be cycled off, then on from the unit disconnect switch for the control system
to update the DIP switch settings (except for switch 8).
Table 4 DIP switch settings
DIP
Switch
Number OFF ON
1 DX Compressor Cool Chilled Water
2 Electric/Hot Gas Reheat Hot Water Reheat
3 2 Step DX 4 Step DX
4 No GLYCOOL GLYCOOL
5 No Dual Cooling Dual Cooling
6 Not Used Not Used
7 Delayed Reheat Dehumidification with Normal Reheat