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 9

FAN BLADE SETTING

 

AIRFLOW

 

TABLE 7

 

FAN BLADE DIMENSION

"A"

Model Dimension A

 

WA302

1.25

 

WA372

 

 

 

REMOVAL OF FAN SHROUD

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.

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

 

Rated

95° F

82° F

Models

Airflow

OD Temp.

OD Temp.

 

 

 

 

WA302

1,000

56 – 59

64 – 66

 

 

 

 

WA372

1,100

57 – 59

62 – 64

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.

TABLE 9

INDOOR BLOWER PERFORMANCE

CFM AT 230 VOLTS

 

 

WA302, WA372

 

 

 

 

 

 

E.S.P.

High Speed

Low Speed

 

 

 

 

In H2O

Dry Coil

Wet Coil

Dry Coil

Wet Coil

.0

1,395

1,315

950

935

 

 

 

 

 

.1

1,340

1,270

930

915

 

 

 

 

 

.2

1,285

1,190

910

885

 

 

 

 

 

.3

1,205

1,100

855

830

 

 

 

 

 

.4

1,110

1,000

800

755

 

 

 

 

 

.5

1,005

870

---

---

 

 

 

 

 

TABLE 10

RATED CFM AND ESP

 

1

1

 

Model

Rated

Rated

Recommended

CFM

ESP

Airflow Range

WA302

1,000

.40

930 – 1,300

 

 

 

 

WA371

1,100

.30

930 – 1,350

 

 

 

 

j￿Rated CFM and ESP on high speed tap

TABLE 11

MAXIMUM ESP OF OPERATION

ELECTRIC HEAT ONLY

Model

Front Outlet

Top Outlet

 

 

 

 

 

Speed

Low

High

Low

High

KW

Speed

Speed

Speed

Speed

 

 

 

 

 

A0Z

.50

.50

.50

.50

A05

.50

.50

.45

.50

A08

.50

.50

---

---

A10

.45

.50

.35

.50

A15

.35

.40

---

---

B0Z

.50

.50

.50

.50

B06

.40

.50

---

---

B09

.50

.50

.40

.45

B15

.30

.45

---

---

C0Z

.50

.50

.50

.50

C06

.50

.50

---

---

C09

.40

.50

.40

.45

C15

.35

.45

---

---

Manual 2100-404 Page 15

Page 17
Image 17
Bard MIS-656 Troubleshooting, FAN Blade Setting Dimensions, Removal of FAN Shroud, Refrigerant Charge

MIS-656 specifications

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