251934-YTG-G-0708

Drive Selection

1.Determine desired airflow.

2.Calculate or measure the amount of external static pressure.

3.Using the operating point determined from steps 1 & 2, locate this point on the appropriate supply air blower performance table. (Linear interpolation may be necessary.)

4.Noting the RPM and BHP from step 3, locate the appropriate model and drive on the RPM selection table.

5.Review the BHP compared to the motor options available. Select the appropriate motor.

6.Review the RPM range for the motor options available. Select the appropriate drive if multiple drives are available for the chosen motor.

7.Determine turns open to obtain the desired operation point.

Example

1.19000 CFM

2.5.4 iwg

3.Using the supply air blower performance table below, the following data point was located: 1150 RPM & 36 BHP.

4.Using the RPM selection table below, Size X and Model Y is found.

5.36 BHP exceeds the maximum continuous BHP rating of the 30 HP motor. The 40 HP motor is required.

6.1150 RPM is within the range of the 30 & 40 HP drives, but step 5 requires the 40 HP motor.

7.Using the 40 HP motor and drive, 5.5 turns open will achieve 1150 RPM.

Example Supply Air Blower Performance

Air Flow

 

 

 

 

 

 

Available External Static Pressure - IWG

 

 

 

 

 

 

 

3.0

3.4

3.8

4.2

4.6

5.0

5.4

5.8

6.2

6.6

(CFM)

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM BHP

RPM BHP

RPM BHP

RPM BHP

RPM BHP

 

 

 

 

30 HP & Field

Supplied Drive

 

 

 

Standard 30 HP & Drive

 

 

Alternate 40 HP & Drive

 

18000

800

10.00

850

14.00

900

18.00

950

22.00

1000

26.00

1050

30.00

1100

34.00

1150

38.00

1200

42.00

1250

46.00

19000

850

12.00

900

16.00

950

20.00

1000

24.00

1050

28.00

1100

32.00

1150

36.00

1200

40.00

1250

44.00

1300

48.00

20000

900

14.00

950

18.00

1000

22.00

1050

26.00

1100

30.00

1150

34.00

1200

38.00

1250

42.00

1300

46.00

1350

50.00

21000

950

16.00

1000

20.00

1050

24.00

1100

28.00

1150

32.00

1200

36.00

1250

40.00

1300

44.00

1350

48.00

1400

52.00

Table X: RPM Selection

Size

Model

HP

Max

Motor

Blower

6 Turns

5 Turns

4 Turns

3 Turns

2 Turns

1 Turn

Fully

(Tons)

BHP

Sheave

Sheave

Open

Open

Open

Open

Open

Open

Closed

 

 

X

Y

30

34.50

1VL51

BK99

1000

1025

1045

1060

1110

1150

N/A

40

46.00

1VL63

BK67

1125

1175

1250

1325

1400

1475

N/A

 

 

66

Johnson Controls Unitary Products

Page 66
Image 66
York R-410A manual Drive Selection

R-410A specifications

York R-410A is a widely recognized and highly efficient refrigerant used in modern air conditioning systems. Developed as an environmentally friendly alternative to R-22, R-410A has gained popularity in the HVAC industry due to its numerous advantageous features and characteristics.

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Furthermore, York R-410A systems are engineered with enhanced safety features. The refrigerant is non-toxic and non-flammable, which makes it safer for use in both residential and commercial applications. Additionally, its high thermal stability reduces the risk of breakdown or leakage, contributing to longer system lifespans and lower maintenance costs.

In conclusion, York R-410A stands out as a cutting-edge refrigerant that combines efficiency, safety, and environmental responsibility. With its advanced technologies and remarkable characteristics, it meets the demands of modern air conditioning requirements while paving the way for a sustainable future in HVAC systems. Adopting York R-410A not only benefits individual users through improved comfort and lower energy bills but also plays a vital role in protecting our planet's ozone layer and mitigating climate change.