Johnson Controls ZS-07 User Manual

5566019-BIM-B-1118
Johnson Controls Ducted Systems 47
Drive selection
1. Determine side or bottom supply duct application.
2. Determine the required airflow.
3. Calculate or measure the amount of external static pressure.
4. With the operating point determined from steps 1, 2, and 3, locate this point on the appropriate supply air blower performance
table. Linear interpolation may be necessary.
5. Note the RPM and BHP from step 4 and locate the appropriate motor and/or drive.
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 the turns open to obtain the required operation point.
Example
1. 2600 CFM
2. 1.6 iwg
3. Using the supply air blower performance table below, the following data point was located: 1268 RPM & 1.95 BHP.
4. Using the RPM selection table below, Size X and Model Y is found.
5. 1.95 BHP exceeds the maximum continuous BHP rating of the 1.5 HP motor. The 2 HP motor is required.
6. 1268 RPM is within the range of the 2 HP drives.
7. Using the 2 HP motor and drive, .5 turns open achieves 1268 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
1.5 HP and field supplied drive Standard 1.5 HP and drive Alternate 2 HP and drive
2200 804 0.50 866 0.71 925 0.90 982 1.06 1038 1.21 1092 1.35 1147 1.48 1203 1.61 1259 1.73 1317 1.87
2400 835 0.66 897 0.87 956 1.06 1013 1.22 1069 1.37 1124 1.51 1178 1.64 1234 1.77 1290 1.90 1348 2.03
2600 869 0.84 931 1.05 990 1.24 1047 1.40 1103 1.55 1158 1.69 1212 1.82 1268 1.95 1324 2.07 1382 2.21
2800 906 1.03 968 1.25 1027 1.43 1084 1.60 1139 1.75 1194 1.89 1249 2.02 1304 2.14 1361 2.27 - -
Table X: RPM selection
Size
(tons)
Model HP Max BHP
Motor
sheave
Blower
sheave
6 turns
open
5 turns
open
4 turns
open
3 turns
open
2 turns
open
1 turn
open
Fully
closed
XY
1.5 1.73 1VM50 AK74 N/A 897 945 991 1035 1079 1126
2 2.30 1VM50 AK64 N/A 1039 1094 1150 1207 1256 1308

Johnson Controls ZS-07 Specifications

General

Brand	Johnson Controls
Model	ZS-07
Category	Air Conditioner
Language	English