Field Controls ventCool Instructions Manual page 6

Install 50VA 24VAC System Transformer: Following the instructions included with the transformer, install the Install 50VA 24VAC System Transformer:
transformer near the IVRC damper control module. Ensure the power is disconnected to the line voltage circuit that
will power the transformer, and connect the 120V side of the transformer to the line voltage. Connect the 24VAC
side of the transformer to the IVRC damper control module terminals CX and RX (IVRC terminals 1 & 2). NOTE:
120V power must be maintained to the transformer at all times for proper operation of the ventCool™ system.
IMPORTANT: The IVRC terminals CX and RX terminals (1 & 2) must ONLY be connected to the IMPORTANT: The IVRC terminals CX and RX terminals (1 & 2) must ONLY be connected to the ventCool™
system 24VAC transformer! system 24VAC transformer!
control power. The HVAC system, thermostat, and ventCool™ system must be installed as shown in this control power. The HVAC system, thermostat, and ventCool™ system must be installed as shown in this
manual or equipment damage may occur! Connect ventCool™ System Dampers to the IVRC Damper Control Module. manual or equipment damage may occur! Connect ventCool™ System Dampers to the IVRC Damper Control Module.
Use the included modular damper cables to connect dampers to the IVRC (see fi gures below). Use the included modular damper cables to connect dampers to the IVRC (see fi gures below).
Dampers and IVRC have modular connectors to prevent miswiring and for ease of installation. The cables Dampers and IVRC have modular connectors to prevent miswiring and for ease of installation. The cables
have diff erent connectors on either end, that mate to corresponding connectors on the IVRC and on the have diff erent connectors on either end, that mate to corresponding connectors on the IVRC and on the
damper motors. The damper cables are not specifi c to any of the dampers and may be freely interchanged. damper motors. The damper cables are not specifi c to any of the dampers and may be freely interchanged.
(HINT: Mark connector housing of each damper harness for identifi cation purposes, when installation is complete.) (HINT: Mark connector housing of each damper harness for identifi cation purposes, when installation is complete.)
Ensure that the system dampers are connected to the correct connectors on the IVRC, depending on their
function. Refer to the system diagram and connector identifi cation on the IVRC. Incorrect connections will not
damage the IVRC or dampers, but will cause incorrect operation of the ventCool™ system.
Damper cables may be extended up to 50 feet with 18 gauge wire. Make sure proper connections are made;
incorrect connections may damage the IVRC, 24V transformer, and/or system dampers.
FIG 5
Connect IVRC Damper Control Module, Outdoor Temperature Sensor, and Smart Thermostat to HVAC System: Connect IVRC Damper Control Module, Outdoor Temperature Sensor, and Smart Thermostat to HVAC System:
Select the appropriate wiring diagram for the HVAC system type from the wiring diagrams (A through D), and wire
the IVRC, Outdoor Temperature Sensor, and Smart Thermostat into the HVAC system as shown.
NOTE: The IVRC is connected to the thermostat in place of the "Free Cooling Damper" as shown in the Venstar® NOTE:
thermostat installation instructions diagram.
IMPORTANT: The thermostat terminal Y2 is the sole mechanical cooling output from the thermostat when IMPORTANT: The thermostat terminal Y2 is the sole mechanical cooling output from the thermostat when
confi gured for free cooling, as Y1 is used exclusively to control Automatic Ventilation Cooling. If the HVAC system has confi gured for free cooling, as Y1 is used exclusively to control Automatic Ventilation Cooling. If the HVAC system has
multi-stage mechanical cooling, to utilize full capacity of the mechanical cooling system, confi gure the HVAC multi-stage mechanical cooling, to utilize full capacity of the mechanical cooling system, confi gure the HVAC
mechanical cooling system to operate with a single-stage input, refer to the HVAC equipment manufacturer's mechanical cooling system to operate with a single-stage input, refer to the HVAC equipment manufacturer's
instructions regarding control by a single-stage thermostat. In some cases, this may require the use of an instructions regarding control by a single-stage thermostat. In some cases, this may require the use of an
installer-supplied delay-on-make timer to activate 2nd stage cooling. installer-supplied delay-on-make timer to activate 2nd stage cooling.
ventCool™ power must be separate and independent from the HVAC 24V ventCool™ power must be separate and independent from the HVAC 24V
page 6
FIG 6
NOTE:
ventCool™
The The