Preliminary Start-Up; Running In Stand Alone (Orphan) Mode - Bard MULTI-TEC W18AAPA Installation And Service Instructions Manual

RUNNING IN STAND ALONE (ORPHAN) MODE

With the AC breakers turned on, each MULTI-TEC wall-mount unit has the capability to run without the LC6000
controller attached—this feature is called stand alone or orphan mode. This keeps the shelter between 60°F and
77°F (factory default settings) by the use of the factory-installed return air sensor in each wall-mount unit. The
blower runs continuously in stand alone mode.
The wall-mount unit can be turned on and off with the TEC-EYE
the system will heat or cool. NOTE: The blower will continue to run when OFF is chosen. Refer to page 29 to change
ON/OFF Control.
To change default setpoints, refer to Setpoints: Local Cool and Heat/Current Cool and Heat on page 25.
To change temperature differentials, refer to Temperature Control section on pages 29 and 30.
During installation, this allows deactivation of one of the two existing, older wall-mount units, while keeping
the shelter cool with the other unit still operating. Once the first of the two Bard MULTI-TEC wall-mount units is
installed, orphan mode can be enabled early in the installation—keeping the climate inside the shelter stable and
the installers comfortable while the remainder of the older equipment is removed and the second Bard MULTI-TEC
wall-mount unit and LC6000 controller are installed.
To ensure units will go into orphan mode, disconnect the plug marked R-T-/R+T+/GND on the wall-mount unit control
board. Be sure to reconnect the plug before operating the wall-mount unit as part of the Bard Free Cooling Unit
System.
Additionally, should either or both MULTI-TEC 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.
See the LC6000 controller manual for information on connecting the communication wiring from the controller to
the wall-mount units and operating the Bard Free Cooling Unit System.

PRELIMINARY START-UP

hand-held diagnostic tool. When ON is chosen,
TM
Manual 2100-665A
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