York W)036 THRU 060 Specifications download pdf (Page 37)

542300-YIM-A-1009

Johnson Controls Unitary Products 37

Drive Selection

1. Determine side or bottom supply air 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.

Example

1. 2200 CFM

2. 1.6 iwg

3. Using the supply air blower performance table below, the following data point was located: 1478 RPM & 1.82 BHP.

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

5. 1.82 BHP exceeds the maximum continuous BHP rating of the 1.5 HP motor. The 2 HP motor is required.

6. 1478 RPM is within the range of the 2 HP drive.

7. Using the 2 HP motor and drive, 2.5 turns open will achieve 1478 RPM.

Example Supply Air Blower Performance

Air Flow

(CFM)

Available External Static Pressure - IWG

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP

Field Supplied

Drive

Standard Drive Option HIgh Static Drive Option

2000 907 1.00 990 1.07 1070 1.15 1146 1.23 1220 1.31 1291 1.40 1359 1.49 1425 1.58 1488 1.68 1550 1.77

2200 960 1.24 1043 1.31 1123 1.39 1199 1.47 1273 1.55 1344 1.64 1412 1.73 1478 1.82 1541 1.92 1602 2.01

2400 1015 1.51 1099 1.59 1178 1.66 1255 1.74 1329 1.83 1400 1.92 1468 2.01 1534 2.10 1597 2.19 1658 2.29

2600 1074 1.83 1157 1.90 1237 1.98 1314 2.06 1387 2.14 1458 2.23 - - - - - - - -

Table X: RPM Selection

Size

(Tons)

Model HP

Max

BHP

Motor

Sheave

Blower

Sheave

5 Turns

Open

4 Turns

Open

3 Turns

Open

2 Turns

Open

1 Turn

Open

Fully

Closed

1.5 1.73 1VL44 AK56 930 995 1060 1130 1195 1260

2 2.3 1VP56 AK56 1325 1395 1460 1525 1590 1660

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 57 58

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York W)036 THRU 060 Specifications Page 37

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