Description Of Operation - Field Controls ventCool Instructions Manual

FIG 1
The system consists of an outdoor air intake duct with Ventilation Cooling Damper (outdoor air intake not
included), a Return Air Damper, a Relief/Exhaust Damper (screened termination cap not included), a
damper control module (IVRC), and smart thermostat with outdoor air temperature sensing and free cooling mode
capabilities. All outdoor air coming into the building must be fi ltered by a media air cleaner such as the Field Controls
Trio™, which when installed as shown serves as the HVAC system fi lter for extended dust and particulate removal.
The system dampers are automatically controlled by the IVRC Damper Control Module, which is in turn controlled
by the smart thermostat. The smart thermostat determines when the Automatic Ventilation Cooling mode should
occur, based on indoor and outdoor temperature conditions.
Optional items not included are components for year-round fresh air mechanical ventilation, which may be directly
integrated into the ventCool™ system for the purpose of meeting mechanical ventilation code requirements of
ASHRAE 62.2: FAD Fresh Air Damper, HHSC+ Ventilation Control, and optional T-Sensor Damper Control.
NOTE NOTE: : When the HVAC system is in "Free Cooling Mode", the HVAC fan is enabled and the heating and mechanical
cooling functions of HVAC system is disabled.

DESCRIPTION OF OPERATION:

When the smart thermostat senses a need for indoor cooling, and outdoor conditions are suitable (refer to System
Setup section), the ventCool™ Ventilation Cooling Mode will be activated. At all other times, the smart thermostat
will command normal operation of the mechanical HVAC system, for both heating and mechanical cooling, and the
ventCool™ system will be de-activated.
page 2