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Form No. S3401-812
Supersedes S3401-510
Page 3 of 8
Bard Wall-Mounts are designed to provide optional ventilation packages to meet all of your ventilation and indoor air quality requirements. All
units are equipped with a barometric fresh air damper as the standard ventilation package. All ventilation packages can be built-in at the
factory or field-installed at a later date.
BAROMETRIC FRESH AIR DAMPER - BFAD-1 STANDARD
The barometric fresh air damper is a standard feature on all models. It is installed on the inside of the service door and
allows outside ventilation air, up to 25% of the total airflow rating of the unit, to be introduced through the air inlet openings
and to be mixed with the conditioned air. The damper opens during blower operation and closes when the blower is off.
Adjustable blade stops allow different amounts of outside air to be introduced into the building and can be easily locked
closed if required.
BLANK OFF PLATE - BOP-1A OPTIONAL
A blank off plate is installed on the inside of the service door. It covers the air inlet openings, which restricts any outside air
from entering the unit. The blank off plate should be utilized in applications where outside air is not required to be mixed
with the conditioned air.
COMMERCIAL ROOM VENTILATOR - CRVS-1 OPTIONAL
The built-in commercial room ventilator is internally mounted behind the service door and allows outside ventilation air, up to
50% of the total airflow rating of the unit, to be introduced through the air inlet openings.
The commercial room ventilator (CRV) is a simple and innovative approach to improving the indoor air quality by providing
fresh air intake and exhaust capability through the CRV. The damper can be easily adjusted to control the amount of fresh air
supplied into the building. The CRV can be controlled by indoor blower operation or field controlled based on room occupancy.
Two versions available (except on 1.5 and 2-Ton models). The CRV and CRVS are power open - spring return on power loss,
and CRVP is power open and power close. Complies with ANSI/ASHRAE Standard 62.1 “Ventilation for Acceptable Indoor
Air Quality”.
ECONOMIZER - EIFM-1B OPTIONAL
The built-in economizer system is internally mounted behind the service door and allows outdoor air to be introduced through
the air inlet openings. The amount of outdoor air varies in response to the system controls and settings defined by the end
user. It includes a built-in exhaust air damper. The economizer is designed to provide “free cooling” when outside air conditions
are cool and dry enough to satisfy cooling requirements without running the compressor. This in turn provides lower operating
costs, while extending the life of the compressor.
Standard Features:
•
One Piece Construction - Easy to install with no mechanical linkage adjustment required.
• Exhaust Air Damper - Built in with positive closed position. Provides exhaust air capability to prevent pressurization of
tight buildings.
• Actuator Motor - 24 volt, power open, spring return with built in torque limiting switch.
• Proportioning Type Control - for maximum “free cooling” economy and comfort.
• Moisture Eliminator & Prefilter - permanent, washable aluminum construction.
• Enthalpy Control - adjustable to monitor outdoor temperature and humidity.
• Minimum Position Potentiometer - adjustable to control minimum damper blade position for ventilation purposes.
• Mixed Air Sensor - to monitor outside and return air to automatically modulate damper position.
Barometric Fresh Air Damper
Economizer
NOTE: The above vent systems are intake only without built-in exhaust capability. Building will likely require separate field
installed barometric relief or mechanical exhaust elsewhere within the conditioned space. Balancing dampers in the return air
grille may be required to achieve specified amount of outdoor air intake.
Ventilation System Packages
Commercial Room Ventilator