Compressor; Figure 2.15 Adjusting Damper Modulation Value - Bard MULTI-TEC W18AAPA Installation And Service Instructions Manual

3. The outdoor air dewpoint is less than 60°F (OA
Dew Pt Set on display). See Figure 2.14.
4. LC6000 is not currently in Dehum 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 or Derivative (see Figure 2.15).
6. Press UP or DOWN keys to adjust parameter value.
7. Press ENTER key to save.
FIGURE 2.15
Adjusting Damper Modulation Values
Manual 2100-665A
Page 32 of 51
Economizer Note
The economizer and mechanical cooling can operate
simultaneously because the economizer uses the mixed
air temperature sensor.

Compressor

Enable
The compressor will be enabled when stage 1 is
enabled and outdoor air conditions are not acceptable
for economizing. If the conditions are acceptable, the
compressor will run when stage 2 is enabled.
Delays and Run Time
The compressor will have a minimum run time of 180
seconds and a minimum off time of 120 seconds. If
the compressor is two stage, the second stage will have
a minimum delay of 120 seconds. The 2nd stage will
also have a minimum on time of 120 seconds. Each
wall unit will have a delay based on the address so
that the compressors on each unit will start at different
times if a call to all units is given. This will prevent
large in rush current from occurring. This delay is 5
seconds times the unit address. Example: 5 seconds x
unit 6 = 30 seconds.