Johnson Controls R-410A Manuale Utente

505430-BTG-A-0309

Johnson Controls Unitary Products

69

1.

Determine Upflow or Horizontal supply duct Application.

2.

Determine desired airflow.

3.

Calculate or measure the amount of external static pressure.

4.

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

5.

Noting the RPM and BHP from step 4, locate the appropriate motor and/or drive on the RPM selection table.

6.

Review the BHP compared to the motor options available. Select the appropriate motor and, or drive.

7.

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

8.

Determine turns open to obtain the desired operation point.

1.

3250 CFM

2.

1.4 iwg

3.

Using the supply air blower performance table below, the following data point was located: 1100 RPM & 1.8 BHP.

4.

Using the RPM selection table below, Model X is found.

5.

1.8 BHP exceeds the maximum continuous BHP rating of the 1.5 HP motor. The 2 HP motor is required.

6.

1100 RPM is within the range of the 2 HP drives.

7.

Using the 2 HP motor and drive, 1 turn open will achieve 1128 RPM.

Standard 1.5 HP & Drive

High Static 2 HP & Drive

3000

696

0.9

757

1.1

822

1.2

891

1.3

961

1.3

1019

1.5

1077

1.6

1135

1.8

3250

729

1.1

790

1.3

855

1.4

924

1.5

984

1.6

1042

1.7

1100

1.8

1159

2.0

3500

766

1.3

826

1.5

892

1.6

953

1.6

1010

1.8

1069

1.9

1127

2.0

X

Std.

1.5

1.73

1VL40

AK69

N/A

690

743

796

849

902

955

HS

2

2.30

1VL40

AK56

N/A

863

929

995

1062

1128

1194