Bard WA701-B, WA702-A, WA721 Troubleshooting, FAN Blade Setting Dimensions, Removal of FAN Shroud

Page 19

TROUBLESHOOTING

FAN BLADE SETTING DIMENSIONS

Shown in the drawing below are the correct fan blade setting dimensions for proper air delivery across the outdoor coil.

Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimensions below be checked and blade adjusted in or out on the motor shaft accordingly.

FIGURE 10

FAN BLADE SETTING

TABLE 7

FAN BLADE DIMENSIONS

Model

Dimension A

 

 

WA611

1.25

WA70

 

WA721

.75

 

 

REMOVAL OF FAN SHROUD

6.Service motor/fan as needed.

7.Reverse steps to reinstall.

REFRIGERANT CHARGE

The correct system R-22 charge is shown on the unit rating plate. Optimum unit performance will occur with a refrigerant charge resulting in a suction line temperature (6 inches from compressor) as shown in Table 8:

TABLE 8

SUCTION LINE TEMPERATURES

Models

Rated

95° F

82° F

Airflow

OD Temp.

OD Temp.

 

 

 

 

 

WA611

1,350

52 - 54

57 - 60

WA70

1,800

58 - 60

56 - 58

 

 

 

 

WA721

1,800

59 - 61

57 - 59

 

 

 

 

The suction line temperatures in Table 8 are based upon 80ºF dry bulb / 67ºF wet bulb (50 percent R.H.) temperature and rated airflow across the evaporator during cooling cycle.

1.Disconnect all power to unit.

2.Remove the screws holding both grills – one on each side of unit – and remove grills.

3.Remove screws holding fan shroud to condenser and bottom – (9) screws.

4.Unwire condenser fan motor.

5.Slide complete motor, fan blade, and shroud assembly out the left side of the unit.

TABLE 10

TABLE 9

CFM and ESP

 

1

1

Recommended

Rated

Rated

Rated

Air Flow

Model

CFM

ESP

Range

WA611

1,350

.20

1,475 -- 1,100

WA70

1,800

.20

2,000 -- 1,375

 

 

 

 

WA721

1,800

.20

2,000 -- 1,475

QRated CFM and ESP on high speed tap.

INDOOR BLOWER PERFORMANCE – CFM AT 230 VOLTS

 

 

WA611

 

 

WA70

 

 

 

 

 

WA721

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E.S.P.

High Speed

Medium Speed 1

High Speed

Low Speed

 

 

 

 

 

 

 

 

In H2O

Dry Coil

Wet Coil

Dry Coil

Wet Coil

Dry Coil

Wet Coil

Dry Coil

Wet Coil

.0

1,700

1,575

1,425

1,375

2,200

2,000

1,600

1,450

.1

1,550

1,475

1,375

1,250

2,100

1,900

1,525

1,375

 

 

 

 

 

 

 

 

 

.2

1,400

1,350

1,250

1,100

2,000

1,800

---

---

.3

1,250

1,150

1,100

---

1,875

1,700

---

---

 

 

 

 

 

 

 

 

 

.4

---

---

---

---

1,775

1,600

---

---

.5

---

---

---

---

1,650

1,475

---

---

 

 

 

 

 

 

 

 

 

jThis model has 3-speed motor, but low speed cannot be used.

Manual 2100-425 Page 17

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Page 18 Page 20
Contents INSTRUCTIONSWA701-BWA701-C WA702-A WA721 Wall Mounted Packaged AIR ConditionerContents For More INFORMATION, Contact These Publishers Getting Other Information and PublicationsAIR Conditioner Wall Mount Model Nomenclature Wall Mount General InformationElectric Heat Table Unit Dimensions Electrical Specifications General Shipping DamageDuct Work Condensate Drain Blower Damper AssemblyFilters Fresh AIR IntakeWall Mounting Information Installation InstructionsTypical Installations Wiring Main PowerMounting Instructions Wall Thermostat and Subbase Combinations Wiring LOW Voltage WiringThermostat Wire Size Operating Voltage RangeWALL-MOUNTING Instructions Common WALL-MOUNTING Installations Electric Heat Clearance LOW Voltage Wiring Start UP Important Installer NoteHigh Pressure Switch Three Phase Scroll Compressor Start UP InformationSequence of Operation Service HintsCompressor Control Module Adjustable Delay on Make and Delay on Break Timer AdjustmentsPhase Monitor Pressure Service PortsRefrigerant Charge TroubleshootingFAN Blade Setting Dimensions Removal of FAN ShroudMaximum ESP of Operation Electric Heat only Cooling Pressure All temperatures FOptional Accessories Page Page Page

WA701-C, WA701-B, WA611, WA721, WA702-A specifications

The Bard WA702-A, WA721, WA611, WA701-B, and WA701-C are part of Bard's renowned series of wall-mounted HVAC units designed for superior heating and cooling performance in various applications, particularly in the commercial and residential sectors. Each model boasts distinctive features and technologies that cater to specific comfort needs and energy efficiency requirements.

The Bard WA702-A model is noted for its energy-efficient engineering. It utilizes advanced scroll compressor technology, ensuring quiet operation and improved reliability. The unit’s high seasonal energy efficiency ratio (SEER) allows it to operate effectively in a variety of climate conditions, providing economic savings on energy bills.

The WA721 model takes efficiency a step further by incorporating Bard’s innovative electric heat option, which delivers rapid heating capabilities. This model is suitable for colder climates where quick temperature adjustments are essential. Its compact design allows for easy installation without compromising space, making it ideal for both residential and light commercial settings.

The WA611 is engineered with versatility in mind. This model supports multi-zone heating and cooling, allowing users to adjust temperatures in different areas independently. Its advanced controls facilitate optimal comfort while minimizing energy consumption. The WA611 also features an integrated air filtration system to enhance indoor air quality, which is a significant consideration in modern HVAC systems.

For those seeking dual functionality, the WA701-B and WA701-C models stand out with their remarkable heating and cooling capabilities. Both units are equipped with Bard’s patented thermal expansion valve (TXV) that optimizes refrigerant flow for improved efficiency across varying loads. The WA701 series includes robust insulation to reduce noise levels and enhance performance during operation.

In addition to their energy-efficient and space-saving designs, all models feature easy-to-use digital controls, enabling users to adjust settings conveniently. Moreover, the units are constructed with durable materials, providing long-lasting performance even in demanding environments.

Overall, the Bard WA series represents a blend of innovative technology, efficiency, and user-friendly designs that address the ever-changing needs of heating and cooling in contemporary spaces. Whether it’s for residential purposes or commercial applications, these models stand out for their promising performance and reliability, ensuring comfort and satisfaction for users.
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