Bard W12A User Manual
THE WALL-MOUNT™ ONE TON AIR CONDITIONER
W12A 60Hz
10,800 Btuh 9.00 EER
Right Side Control Panel
The Bard Wall-Mount One Ton Air Conditioner is a self contained energy
efficient heating and cooling system, which is designed to offer maximum
indoor comfort at a minimal cost without using valuable indoor floor space or
outside ground space. The One Ton is the ideal product for versatile
applications such as: new construction, modular offices, school
modernization, telecommunication structures, portable structures or
correctional facilities. Factory or field installed accessories are available to
meet specific job requirements.
Engineered Features
Aluminum Finned Copper Coils
Grooved tubing (evaporator coil only)
and enhanced louvered fin for maximum
heat transfer and energy efficiency.
Quiet Twin Blowers:
Designed to accept full ducted system
or for non-ducted free blow installations.
High Efficiency Rotary
Compressor
R-410A Refrigerant:
Designed with R-410A (HFC) non-ozone
depleting refrigerant in compliance with
the Montreal protocol and 2010 EPA
requirements.
Liquid Line Filter Drier:
Standard on all units. Protects system
against moisture.
Galvanized 20 Gauge Zinc Coated
Steel Cabinet:
Cleaned, rinsed, sealed and dried before
the polyurethane primer is applied. The
cabinet is handsomely finished with a
baked on textured enamel, which allows
it to withstand 1000 hours of salt spray
tests per ASTM B117-03.
Electrical Components:
Are easily accessible for routine
inspection and maintenance through a
right side, service panel opening.
One Inch, Disposable Air Filter:
Easily removed for replacement from
the outside. Optional two-inch pleated
filter, factory or field installed.
Top Rain Flashing:
Standard feature on all models.
Slope Top:
Standard feature for water run-off.
Compressor Control Module:
Standard on all units. Built-in off-delay
timer adjustable from 30 seconds to 5minutes. 2-minute on-delay if power
interrupt. 120-second bypass for low
pressure control, and both soft and
manual lockouts for high and low
pressure controls. Alarm output for
alarm relay.
High & Low Pressure Switches are
Auto-Reset:
Standard on all units. Built-in lockout
circuit resets from the room
thermostat. Provides commercial
quality protection to the compressor.
Barometric Fresh Air Damper:
Allows up to 100 CFM of fresh air.
Automatic Condensate
Disposal System:
Eliminates the need to provide a
separate condensate drain. The drain
valve closes at temperatures above
40° and opens when the temperature
drops below 40°. Built-in slinger ring
fan blade.
Full Length Mounting Flanges:
Built into cabinet for improved
appearance and easy installation.
GREEN REFRIGERANT
R-410A
Optional Product Features
Alarm Relay:
Dry contacts for remote alarm on
high or low pressure lockouts.
Low Ambient Control:
Permits operation down to 0°F
outdoor ambient. Can be factory
or field installed.
• Complies with efficiency requirements of ANSI/ASHRAE/IESNA 90.1-2010.
• Certified to ANSI/ARI Standard 390-2003 for SPVU (Single Package Vertical Units).
• Intertek ETL Listed to Standard for Safety Heating and Cooling Equipment ANSI/UL
1995/CSA 22.2 No. 236-05, Fourth Edition.
• Commercial Product - Not intended for Residential application.
Fully Modulating Economizer:
Can be factory or field installed.
Commercial Room Ventilator:
Can be factory or field installed.
Form No. S3401-812
Supersedes S3401-510
Page 1 of 8
.P.S.E
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0.005/035524/564
1.064/584004/514
2.524/044053/563
3.573/093003/513
4.003/523582/003
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0
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0
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Capacity and Efficiency Ratings
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Z0A-2A21W802/0321ENON008,010.9
30A-2A21W802/0321WK6.3008,010.9
50A-2A21W802/0321WK0.5008,010.9
00K-1A21W5111 ENON008,010.9
taeH
20K-1A21W5111
WK2.2008,010.9
1 Capacity is certified in accordance with ANSI/ARI Standard 390-2003.
2 EER = Energy Efficiency Ratio and is certified in accordance with ANSI/ARI Standard 390-2003.
All ratings based on fresh air intake being 100% closed (no outside air introduction).
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Electrical Specifications
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Z0A-2A21W 4
30A 4
50A 4
00K-1A21W 4
20K 4
1 Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.
2 Based on 75°C copper wire. All wiring must conform to NEC and all local codes.
3 These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors.
Refer to the National Electrical Code (latest revision), article 310 for power conductor sizing.
4 Internal circuit breakers are standard on W12A2-A models.
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1-511621-401
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82
02
92
CAUTION! When more than one field power conductor
circuit is run through one conduit, the conductors must be
derated. Pay special attention to note 8 of table 310
regarding Ampacity Adjustment Factors when more than 3
conductors are in a raceway.
REE 2
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11
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02
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03
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Specifications
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A-2A21W1-802/0328.4/5.55.231-5701-01/107.2-0561-8/158.01./004.sbl061
K-1A21W1-5116.110.361-5701-01/104.12-0561-8/106.101./004.sbl061
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Electric Heat Table
sledoM A-2A21W
1-V042 1-V802
WK SPMA HUTB SPMA HUTB SPMA HUTB
0.30.51582,210.31032,9--
0.58.02560,711.81008,21--
0.2-- -- 3.81015,7
K-1A21W
1-V021
Cooling Application Data - Outdoor Temperature °F
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°57 °08 °58 °09 °59 °001 °501 °011 °511 °021
004,11
001,9
001,21
008,8
005,41
001,9
000,11
009,8
009,11
007,8
000,41
009,8
005,01
008,8
006,11
007,8
004,31
008,8
1 .lortnoctneibmawoldellatsnidleifroyrotcafaseriuqertinu,F°55woleB
2 .F°.pmetrianruteR
sledoM .B.W/.B.D 22
26
A21W
76
27
22
2
/57
/08
/58
Indoor Blower Performance - CFM at 230
1
000,01
006,8
003,11
006,8
008,21
006,8
004,9
004,8
008,01
004,8
000,21
003,8
000,9
001,8
004,01
002,8
004,11
000,8
003,8
008,7
008,9
000,8
006,01
007,7
wolfriAdetaRfo%01-detaR01+
HUTBlatoT579.00.120.1
HUTBelbisneS059.00.150.1
008,7
005,7
002,9
007,7
008,9
003,7
001,7
001,7
005,8
003,7
000,9
008,6
SROTCAFREILPITLUMYTICAPAC
04,6
04,6
07,7
09,6
00,8
03,6
Form No. S3401-812
Supersedes S3401-510
Page 2 of 8
Ventilation System Packages
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.
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
Barometric Fresh Air Damper
Commercial Room Ventilator
grille may be required to achieve specified amount of outdoor air intake.
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
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.
Form No. S3401-812
Supersedes S3401-510
Page 3 of 8
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