Bard W70A1 Manual de usuario Pagina 4

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Form No. S3409-1112
Supersedes S3409-712
Page 4 of 8
Ventilation System Packages
BAROMETRIC FRESH AIR DAMPER - BFAD 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 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.
MOTORIZED FRESH AIR DAMPER - MFAD OPTIONAL
The motorized fresh air damper is internally mounted behind 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 two position damper can be fully opened or closed. The damper blade
is powered open by a 24VAC motor with spring return on power loss. The damper can be controlled by
indoor blower operation or can be field connected to be managed based on building occupancy.
COMMERCIAL ROOM VENTILATOR - CRV 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. It includes a built-in exhaust air damper.
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 are available: the
CRVS is power open - spring return on power loss; the CRVP is power open and power return.
Complies with ANSI/ASHRAE Standard 62.1 “Ventilation for Acceptable Indoor Air Quality.”
ECONOMIZER - ECONWM-Series 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.
ECONWMT Equipment Building versions have extended air intake hood to deliver up to 100% of cooling rated airflow.
16" for ECONWMT-E2 or T2, and E3 or T3
18" for ECONWMT-E5 or T5
ECONWMS Classroom versions have 3" air intake hood to deliver up to 75% of cooling rated airflow.
Standard Features:
Fully modulating
Honeywell Direct Drive Hi-Torque Actuator
No linkage required
Simple single blade design
Positive shut-off with non-stick gaskets
Electronic DB and/or Enthalpy sensors depending upon version
Honeywell JADE electronic economizer module with precision settings and diagnostics
DB or Enthalpy economizer versions available
WALL-MOUNT ENERGY RECOVERY VENTILATOR - ERVF OPTIONAL
The wall-mount energy recovery ventilator is a highly innovative approach to meeting indoor air quality
ventilation requirements as established by ANSI/ASHRAE Standard 62.1. The ERVF allows from 200
to 450 CFM (depending upon model) of fresh air and exhaust through the unit while maintaining
superior indoor comfort and humidity levels. In most cases, this can be accomplished without
increasing equipment sizing or operating costs. Heat transfer efficiency is up to 67% during summer
and 75% during winter conditions.
The ERVF consists of a unique “rotary energy recovery cassette” that provides effective sensible and
latent heat transfer capabilities during summer and winter conditions. Various control schemes are
addressed - including limiting ventilation during building occupancy only.
The ERVF is designed to be internally mounted behind the service door in the W70A or W70L model
wall mount units. It can be built-in at the factory or field installed as an option. ERVF-*5C can be
independently adjusted for intake and exhaust rates.
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
Energy Recovery Ventilator
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.
Motorized Fresh Air Damper
Economizer
Commercial Room Ventilator
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