Preliminary Start-Up - Bard W48A2PQ Installation And Service Instructions Manual

PRELIMINARY START-UP

RUNNING IN STAND ALONE (ORPHAN) MODE
With the AC breakers turned on, each W-Series wall-mount system has the capability to run without the PLC
controller attached—this feature is called Stand Alone or Orphan Mode, and it basically keeps the shelter between
60°F and 77°F by the use of the factory-installed return air sensor in each wall-mount unit.
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 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 wall-mount unit and PLC
controller is installed.
Additionally, should either or both wall-mount units lose communication with the PLC controller (such as during
maintenance), they will continue to serve the shelter's needs until a repair can be made.
Manual 2100-642
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