Bard LC6000-200 User Manual

6. Press ENTER key to scroll to Time Based (see
Figure 23). The changeover time is 12 am.
7. Press UP or DOWN key to change ON to OFF.
8. Press ENTER key to scroll to Num. of Days.
9. Press UP or DOWN keys to adjust the number of
days.
10. Press ENTER key to scroll to Manual.
11. Press UP or DOWN key to change OFF to ON.
FIGURE 23
Rotation
Demand
The system will compare the zone temperature
(determined by zone averaging selection) to the
zone cooling and heating setpoint. A demand will be
calculated to determine how many units are required.
For cooling, the zone temperature will be compared
to the cooling setpoint. The controller will calculate a
demand based on how far above the setpoint and how
long it has been above the setpoint. The demand value
(0-100%) will then be split and applied to free cooling
and cooling separately shown as two demands both
ranged 0-100% applied to all of the available cooling
methods for that zone. For example, if the demand is
at 50% and there are 10 available stages of cooling in
that zone, there would be 5 stages active (50% x 10
= 5). The system will prioritize free cooling stages over
compressor stages. Adding to the example, if 5 of the
10 stages for cooling are economizer, 5 units would
be running economizer and no compressors running.
The demand is calculated for the cooling application.
However, for display purposes, the demand is split
so that the user can see demand separately for free
cooling and compressor.
For heating, the zone temperature will be compared
to the heating setpoint. The controller will calculate a
demand based on how far below the setpoint and how
long it has been below the setpoint. The demand value
0-100% will the be applied to all of the available stages
of heating in that zone. For example, if the demand is
at 50% and there are 5 available stages of heating in
that zone, there would be 2 stages active (50% x 5 =
2.5 and a half of a stage cannot be turned on).
Humidity Control
The LC can be configured to control up to three
humidifiers (field supplied) with relay outputs and
up to 14 units equipped with dehumidification. The
indoor humidity level for each zone is compared to the
dehumidification setpoint and humidification setpoint
for each zone.
Dehumidification
The LC6000 controller will monitor the indoor relative
humidity of each zone and compare the value to
three setpoints for each zone. The three setpoints
will be described as dehumidification off, passive
dehumidification and active dehumidification. The
default value for these setpoints will be 60% RH, 70%
RH and 80% RH, respectively.
When the humidity level inside the shelter falls to the
dehumidification off setpoint, the system will stop
attempting to dehumidify the space.
When the humidity level rises to the passive
dehumidification setpoint, all units with economizers
will disable the use of economizers for cooling calls.
This will act as passive dehumidification by forcing the
use of compressor for space cooling. Availability for
passive dehumidification will be determined by model
number. All units with economizers will be considered.
When the humidity level rises to the active
dehumidification setpoint, the controller will activate
staged dehumidification. The controller will then
calculate a dehumidification demand based on how
far above the setpoint and how long the RH level
has been above the setpoint. The demand will then
utilize all of the units with active dehumidification
capabilities to reduce the indoor humidity level. The
units will be staged on based on the existing cooling
rotation for the units in the zone up to an optional
maximum number of units running value. Availability
for active dehumidification will be determined by
model number. Units with concurrent electric reheat
or mechanical dehumidification will be considered.
NOTE: Only one type of dehumidification unit will
be considered depending upon configuration of the
LC6000 controller. Unit capability is determined by the
model number.
To change the dehumidification setpoints:
1. Press MENU key to go to the Main Menu screen.
2. Use 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 Zone 1, Zone 2
or Zone 3; press ENTER key.
5. Press UP or DOWN keys to scroll to Setpoints A2-2
(Zone 1), Setpoints A3-2 (Zone 2) or Setpoints
A4-2 (Zone 3).
Manual 2100-669F
Page 23 of 37

Bard LC6000-200 Specifications

General

Brand	Bard
Model	LC6000-200
Category	Controller
Language	English