Bard W12A User Manual

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THE WALL-MOUNT™ ONE TON AIR CONDITIONER

W12A

60Hz

 

GREEN REFRIGERANT

 

10,800 Btuh

9.00 EER

 

R-410A

 

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 5- minutes. 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.

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.

Fully Modulating Economizer:

Can be factory or field installed.

Commercial Room Ventilator:

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.

Form No.

S3401-812

Supersedes

S3401-510

Page

1 of 8

Capacity and Efficiency Ratings

 

 

 

Heat

Cooling

 

Models

Volts

Phase

Strip

Cap. BTUH 1

EER 2

W12A2-A0Z

230/208

1

NONE

10,800

9.0

 

 

 

 

 

 

W12A2-A03

230/208

1

3.6 KW

10,800

9.0

 

 

 

 

 

 

W12A2-A05

230/208

1

5.0 KW

10,800

9.0

W12A1-K00

115

1

NONE

10,800

9.0

 

 

 

 

 

 

W12A1-K02

115

1

2.2 KW

10,800

9.0

 

 

 

 

 

 

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).

Electrical Specifications

Models

 

Rated Volts

Operating Voltage

No. Field

Minimum Circuit3

Maximum External Fuse1

Field Power 2

Ground 2

 

and Phase

Range

Power Ckts.

Ampacity

or Circuit Breaker

Wire Size

Wire Size

 

 

W12A2-A0Z 4

 

 

1

9

15

14

14

A03

4

230/208-1

197-253

1

20

20

12

12

A05

4

 

 

1

28

30

10

10

W12A1-K00

 

115-1

104-126

1

20

30

10

10

K02

 

1

29

30

10

10

 

 

 

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.

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.

Specifications

 

Electrical

Compressor

 

Outdoor Fan Motor

 

Indoor Blower Motor

CFM/ESP

Shipping

Models

Rating - 60 HZ

RLA

LRA

 

HP-RPM-SP

FLA

 

HP-RPM-SP

FLA

(Rated-WET Coil)

Weight

W12A2-A

230/208-1

5.5/4.8

32.5

1/10-1075-1

.70

1/8-1650-2

.85

400/.10

160 lbs.

 

 

 

 

 

 

 

 

 

 

W12A1-K

115-1

11.6

63.0

1/10-1075-1

1.40

1/8-1650-2

1.60

400/.10

160 lbs.

 

 

 

 

 

 

 

 

 

 

 

 

Electric Heat Table

Models

 

W12A2-A

 

 

 

W12A1-K

 

240V-1

208V-1

 

120V-1

KW

AMPS

BTUH

 

 

AMPS

BTUH

 

AMPS

BTUH

3.0

15.0

12,285

 

 

13.0

9,230

 

-

-

5.0

20.8

17,065

 

 

18.1

12,800

 

-

-

2.0

-

-

 

 

-

-

 

18.3

7,510

Indoor Blower Performance - CFM at 230

E.S.P.

High Speed

Low Speed

IN H20

Dry/Wet Coil

Dry/Wet Coil

.0

530/500

465/425

.1

485/460

415/400

.2

440/425

365/350

.3

390/375

315/300

.4

325/300

300/285

Cooling Application Data - Outdoor Temperature °F 1

Models

D.B./W.B.2

Cooling

75°

80°

85°

90°

95°

100°

105°

110°

115°

 

120°

Capacity

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

75/

Total Cooling

11,400

11,000

10,500

10,000

9,400

9,000

8,300

7,800

7,100

 

6,400

 

62

Sensible Cooling

9,100

8,900

8,800

8,600

8,400

8,100

7,800

7,500

7,100

 

6,400

W12A

80/

Total Cooling

12,100

11,900

11,600

11,300

10,800

10,400

9,800

9,200

8,500

 

7,700

67

Sensible Cooling

8,800

8,700

8,700

8,600

8,400

8,200

8,000

7,700

7,300

 

6,900

 

 

 

85/

Total Cooling

14,500

14,000

13,400

12,800

12,000

11,400

10,600

9,800

9,000

 

8,000

 

72

Sensible Cooling

9,100

8,900

8,800

8,600

8,300

8,000

7,700

7,300

6,800

 

6,300

1 Below 55°F, unit requires a factory or field installed low ambient control.

 

 

 

CAPACITY MULTIPLIER FACTORS

 

2 Return air temp. °F.

 

 

 

 

 

 

% of Rated Airflow

-10

Rated

 

+10

 

 

 

 

 

 

 

 

Total BTUH

0.975

1.0

 

1.02

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sensible BTUH

0.950

1.0

 

1.05

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

Barometric Fresh Air Damper

Commercial Room Ventilator

Economizer

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 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 - 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

CRVS-1 TOTAL AND VENTILATION AIRFLOW

 

600

 

 

 

 

500

 

 

 

 

400

 

 

 

(cfm)

 

 

 

 

Airflow

300

 

 

 

 

 

 

 

 

200

 

 

 

 

100

 

 

 

 

0

 

 

 

 

A

B

C

D

Vent Position

Total Air 0.0 ESP

Total Air 0.1 ESP

Total Air 0.2 ESP

Total Air 0.3 ESP

Vent Air 0.0 ESP

Vent Air 0.1 ESP

Vent Air 0.2 ESP

Vent Air 0.3 ESP

Brown/white wire must be switched from terminal X to terminal D on damper motor to attain “D” position. This will bypass potentiometer function and go to “full open” when energized.

Form No.

S3401-812

Supersedes

S3401-510

Page

4 of 8

This Page Intentionally Left Blank

Form No.

S3401-812

Supersedes

S3401-510

Page

5 of 8

This Page Intentionally Left Blank

Form No.

S3401-812

Supersedes

S3401-510

Page

6 of 8

Dimensions of Basic Unit for Architectural and Installation Requirements (Nominal)

 

17.00

3.37

 

 

Fixed Supply Air

 

Opening

Adjustable

 

Return

Return Air

Flanges

Opening in

 

Optional

Lower Position

 

Electrical

 

Entrance

 

 

17.00

 

1.50

20.43

 

Back View (Lower Return)

 

32.00

 

30.29

.25

7.50

TYP.

TYP.

5.41

C

L

19.72

47.28

C

L

19.72

C 1.93 L

C

L

31.15

Front View

17.00

5.00

5.00

Fixed Supply Air

Opening

 

 

5.03

1.95

 

 

 

 

 

Return Air

 

10.05

Opening in

 

Upper Position

10.05

 

 

 

 

 

17.00

Back View (Upper Return)

 

Rain Flashing

 

14.67

 

 

 

 

(Shown Installed)

 

 

 

 

 

2.18

 

Heater and

 

 

 

Filter Access

 

 

 

Panel

 

 

 

Control

 

45.80

 

Panel

 

 

 

26.69

 

 

Ventilation

 

2.79

 

Air

 

6.06

 

 

 

 

Low Voltage

 

Electrical

 

 

Entrance

 

Entrance

 

 

 

 

 

Condenser

 

 

 

Air Exhaust

 

 

 

(Blow through

 

19.88

 

cond. coil)

18.69

 

 

 

 

Condenser

 

 

 

Air Entrance

 

 

C

.38 SQ.

 

 

Mounting

 

 

L

Holes

 

Right Side View

 

 

 

 

 

MIS-2738

Form No.

S3401-812

Supersedes

S3401-510

Page

7 of 8

Air Conditioning Model Nomenclature

 

W 12 A 2

 

 

A

0Z

X

X

X

X

X

 

J

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

| CONTROL

NUMBER |

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODULES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOLTS & PHASE

KW

 

 

 

 

 

 

 

 

 

(See chart below)

 

 

 

 

 

COLOR OPTIONS

 

 

 

 

 

 

 

 

 

 

 

A - 230/208-60-1

0Z - No KW 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COIL OPTIONS

 

 

 

 

 

 

 

 

X -Beige (Standard)

 

CAPACITY |

 

 

 

 

 

 

 

 

 

03 - 3.6 KW 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X - Standard

 

 

 

 

 

 

 

 

 

 

 

1 - White

 

12 - 1 Ton

 

 

 

 

 

 

 

 

 

05 - 5.0 KW 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 - Phenolic Coated Evaporator

 

 

 

 

 

 

 

 

 

 

 

4 - Buckeye Gray

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

K - 115-60-1

 

 

 

00 - No KW

 

 

 

2 - Phenolic Coated Condenser

 

 

 

 

 

 

 

 

 

 

 

5 - Desert Brown

 

 

 

 

 

 

 

 

 

 

 

 

 

02 - 2.2 KW

 

 

 

3 - Phenolic Coated Evaporator

AIR CONDITIONER |

REVISION

 

 

 

 

 

8 - Dark Bronze

 

 

 

 

 

 

 

 

 

 

 

 

 

and Condenser

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

| OUTLET OPTIONS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X - Front (Standard)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FILTER OPTIONS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VENTILATION OPTIONS

 

 

 

 

 

 

 

 

 

 

 

X - 1-Inch Throwaway - 10 x 20 x 1

 

 

 

 

 

 

 

 

 

 

 

(See Vent Options Below.)

W - 1-Inch Washable - 10 x 20 x 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P - 2-Inch Pleated - 10 x 20 x 2 (MERV 8)

 

 

 

 

 

 

1 Internal circuit breakers are standard on -A models.

Clearances Required for Service Access and Adequate Condenser Inlet Airflow

MODEL

LEFT SIDE

RIGHT SIDE

W12A

15"

20"

 

 

 

NOTE: For side by side installation of two (2) W**A models there must be 20" between units.

Minimum Clearances Required to Combustible Materials

MODEL

SUPPLY AIR DUCT

CABINET

FIRST THREE FEET

 

 

W12A

0"

0"

 

 

 

Ventilation Options

Model

W12A

 

Description

Factory Installed

 

Field Installed

Code No.

 

Part No.

 

 

Barometric Fresh Air Damper - Standard

X

 

BFAD-1

 

 

 

 

Blank-Off Plate

B

 

BOP-1A

Commercial Ventilator - Spring Return w/Exhaust

V

 

CRVS-1

 

 

 

 

Economizer - Fully Modulating 1

E

 

EIFM-1B

 

 

 

 

1 Low ambient control is required with economizer for low temperature compressor operation.

Air Conditioning Control Modules

All Models Except As Noted

HPC 1

LPC 2

CCM 3

LAC 4

ALR 5

Factory Installed Code

Field Installed Part

STD

STD

STD

 

 

X

N/A

STD

STD

STD

 

 

E

CMA-28

STD

STD

STD

 

 

J

Factory Only

STD = Standard equipment for these specified models.

1 HPC High pressure control is auto reset. Always used with compressor control module (CCM) which is included. See note 3. 2 LPC Low pressure control is auto reset. Always used with compressor control module (CCM) which is included. See note 3.

3 CCM Compressor control module has adjustable 30-second to 5-minute delay-on-break timer. On initial power-up, or any time the power is interrupted, the delay- on-make will be 2 minutes plus 10% of the delay-on-break setting. There is no delay-on-make during routine operation of the unit. The module also provides the lockout feature (with 1 retry) for high and/or low-pressure controls, and a 2-minute timed bypass for low-pressure control.

4 LAC Low ambient control permits cooling operation down to 0°F.

5 ALR The alarm relay has a set of normally open and normally closed dry contacts to provide the ability to signal a condition of shutdown on either high or low pressure controls.

Bard Manufacturing Company, Inc. Bryan, Ohio 43506 www.bardhvac.com

Manufactured under U.S. Patent No. 5,301,744

Other Patents pending.

Due to our continuous product improvement policy, all specifications subject to change without notice.

Before purchasing this appliance, read important

energy cost and efficiency information available from your retailer.

Form No.

S3401

August, 2012

Supersedes S3401-510

Form No.

S3401-812

Supersedes

S3401-510

Page

8 of 8