Field Controls ventCool Instructions Manual page 3

When Ventilation Cooling Mode is
activated, the following actions occur:
1. Thermostat displays "Free Cooling" on the Home
Screen, and sends a 24 volt signal to the IVRC damper
control module to activate ventilation cooling.
2. The IVRC commands the Ventilation Cooling Damper
to open, the Relief Damper to open, and the Return
Damper to close.
3. When the dampers respond with appropriate signals,
the IVRC will then allow the HVAC system fan to run,
bringing outdoor air into the building, and allowing
return indoor air to exhaust into the attic area and exit
the building via attic ventilation openings. The Relief
Damper serves to increase the outdoor air exchange
rate and cool the attic area.
4. The IVRC display will appear as shown in FIG 2.
When Ventilation Cooling Mode is
de-activated, the following actions occur:
1. Thermostat cuts off the 24 volt Ventilation Cooling signal
to the IVRC damper control module. Thermostat will
display either "System Idle" or "Cooling", depending on
current conditions.
2. The IVRC commands the Ventilation Cooling Damper
to close, the Relief Damper to close, and the Return
Damper to open.
3. When the dampers respond with appropriate signals to
the IVRC, normal operation of the HVAC heating and
mechanical cooling will be allowed.
4. The IVRC display will appear as shown in FIG 3.
With optional Year-Round Fresh Air Mechanical Ventilation:
Mechanical fresh air ventilation may be required by code, for the purpose of providing adequate fresh air
ventilation throughout the year. The Field Controls ventCool™ is designed to be fully compatible with the Field
Controls Healthy Home System™ HHSC+ ventilation controller when installed as directed with a dedicated FAD fresh
air damper. NOTE: NOTE: It is not recommended to use the Ventilation Cooling damper for the purpose of routine fresh air
mechanical ventilation, due to the large volume of outdoor air that may potentially be brought in during periods of
adverse weather conditions.
Normal, independent operation of the HHSC+ and dedicated damper is allowed when the ventCool™ ventilation
cooling mode is de-activated; see the HHSC+ instructions for operation details. When the ventCool™ ventilation
cooling mode is activated, it will continue to allow the HHSC+ to control the dedicated damper according to HHSC+
programming; cycling of the dedicated damper may occur but will have no signifi cant impact on ventilation cooling.
If a mechanical ventilation system by another manufacturer is intended to be installed as part of the HVAC system,
refer to the manufacturers' instructions to ensure proper operation of the overall system. Field Controls cannot
guarantee proper operation if another manufacturer's ventilation system is installed.
page 3
FIG 2
FIG 3