Manual 2100-725C
Page
17 of 39
to be selected therefore defaulting to a disabled state,
along with all sensors/alarms associated with it.
Economizer Enable
The economizer will be enabled for cooling operation
if the model number reflects a wall-mount unit with an
economizer installed, an economizer type other than
None and the conditions for the economizer type are
met. The following list explains the economizer types
and the parameters required for operation. See also
Figures 25 and 26.
FIGURE 25
Economizer A4 Screen
FIGURE 26
Economizer A5 Screen
None
Economizer will not be enabled for free cooling
operation.
Drybulb Only
1. Outdoor air temperature is below the Outdoor Set
outdoor temperature setpoint listed within the
Sys
Config
menu. (Outdoor Set temperature setpoint is
70°F by default.)
2. LC6000 is not currently in any dehumidification
mode.
3. LC6000 is not currently in any emergency mode.
Temperature and Humidity (Default)
1. Outdoor air temperature is below the Outdoor Set
outdoor temperature setpoint listed within the
Sys
Config
menu. (Outdoor Set temperature setpoint is
70°F by default.)
2. Outdoor relative humidity is below the OA Humid
Set outdoor humidity setpoint listed within the
Sys.
Config
menu. (OA Humid Set humidity setpoint is
80% RH by default.)
3. LC6000 is not currently in any dehumidification
mode.
4. LC6000 is not currently in any emergency mode.
Enthalpy
1. Outdoor air temperature is below the Outdoor Set,
outdoor temperature setpoint, listed within the
Sys
Config
menu. (Outdoor Set temperature setpoint is
70°F by default.)
2. Outdoor relative humidity is below the OA Humid
Set outdoor humidity setpoint listed within the
Sys.
Config
menu. (OA Humid Set humidity setpoint is
80% RH by default.)
3. The outdoor air dewpoint is below the OA Dew
Pt Set outdoor dewpoint setpoint, listed within
the
Sys Config
menu. (OA Dew Pt Set dewpoint
setpoint is 55°F by default.).
4. LC6000 is not currently in any dehumidification
mode.
5. LC6000 is not currently in any emergency mode.
Economizer Modulation
The economizer damper output will modulate
between 0% and 100% to maintain a 55°F mixed
air temperature when the outdoor air conditions are
acceptable.
To adjust damper modulation values:
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter
USER password 2000.
3. Press UP or DOWN keys to scroll to
Sys Config
;
press ENTER key.
4. Press UP or DOWN keys to scroll to
Unit Config
(A6)
; press ENTER key.
5. Press ENTER key to scroll to
Mixed FC Set
,
Gain
,
Integral
,
Derivative
or
Min Position
(see Figure 27).
FIGURE 27
Adjusting Damper Modulation Values
