Bard MULTI-TEC W24AAPA, Installation Instructions Manual

Page: 66 / 88

Manual 2100-676B
Page 66 of 88
PRELIMINARY START UP
Running in Stand Alone (Orphan) Mode
WR Series wall-mount units have the capability to
run without the LC6000 controller attached—this
feature is called stand alone or orphan mode. This
keeps the shelter between 50°F and 79°F (factory
default settings) by the use of the factory-installed
return air sensor in each wall-mount unit. In stand
alone mode, no auxiliary temperature measurement
devices are required for operation. The wall-mount
unit automatically uses a continuous blower setting
to circulate room air into the return air inlet and uses
the return air temperature sensor to control room
temperature.
To verify or change the wall-mount unit cooling and
heating setpoints in stand alone mode:
1. Connect the TEC-EYE diagnostic tool to the control
board located in the unit.
2. From the Status screen, press UP or DOWN key
until Quick Menu displays Setpoints (Set) icon.
Press ENTER key.
3. Press ENTER key to scroll to the selected choice
(see Figure 18).
4. Press UP or DOWN key on desired value until value
displays correctly.
5. Press ENTER key to save and scroll to next
parameter.
6. Press ESCAPE key until Main Menu screen is
displayed.
During installation, the ability to run in stand alone
mode allows deactivation of one of the existing, older
wall-mount units, while keeping the shelter cool with
the other unit still operating. Once the first of the Bard
WR Series wall-mount units is installed and powered
on, it will operate in orphan mode—keeping the climate
inside the shelter stable and the installers comfortable
while the remainder of the older equipment is removed
and the remaining Bard WR Series wall-mount units
and LC6000 controller are installed.
To ensure units will go into stand alone mode,
disconnect the plug marked R-T-/R+T+/GND on the
control board located in the wall-mount unit. Be sure
to reconnect the plug before operating the wall-mount
unit as part of the Bard Free Cooling Unit System.
Additionally, should any or all of the WR Series wall-
mount units lose communication with the LC6000
controller (such as during maintenance), they will
continue to serve the shelter’s needs until a repair can
be made.
NOTE: Screenshots shown in this manual reflect
default settings (when applicable).
FIGURE 18
Cool and Heat Setpoints