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NG-IOM-ATT Release 1.2
July 12, 2019
2.4 DAC/WAC Standalone Operation
If the control board in the DAC/WAC unit is unable to communicate with CoolLinks™ controller for a period of sixty
seconds, the DAC/WAC unit will select standalone mode. Here, the unit will run its blower at 100% and both the
DAC/WAC and exhaust dampers will be fully opened. When communications with the controller is restored, the DAC/WAC
will automatically drop out of standalone mode and return to CoolLinks™-controlled operation.
2.5 System Interlocks
Smoke Detector (optional):
If the smoke sensor input to the CoolLinks™ system is active, the blower motor on the DAC/WAC will be shut down and
the DAC/WAC and exhaust dampers will be fully closed. If any HVAC units are running, the compressor, evaporator
blower motor, and heater will be turned off on all units. This is to halt the flow of air within the shelter.
Hydrogen Detector (optional):
If the hydrogen sensor input to the CoolLinks™ system is active, the blower motor on the DAC/WAC will be commanded
to run at 100% and the DAC/WAC and exhaust dampers will be fully opened. Any running HVAC units will continue to do
so and, if not running, their evaporator blower(s) will be commanded to run. The intention here is to expel noxious gases
and to introduce the maximum volume of outside air into the shelter.
Generator Running (optional):
If the generator running input to the CoolLinks™ system is active, only the DAC/WAC unit will be permitted to run even if
the temperature conditions require the HVAC unit(s) to run.
