York International ZQ Series, Installation Manual

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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. 1600 CFM, bottom supply
2. 1.2 iwg
3. Using the airflow performance table below,
the following data point was located:
1359 RPM & 1.11 BHP.
4. Using the RPM selection table below, Model
ZQ and Size 05 (4 tons) is found.
5. 1359 RPM is within the range of the 2.4 HP,
High Static drives.
6. Using the 2.4 HP motor and High Static drive,
2-1/2 turns open will achieve 1359 RPM.
Airflow Performance
Example Supply Air Blower Performance
Table 22: ZQ05 (4.0 Ton) Bottom Duct
1
AVAILABLE EXTERNAL STATIC PRESSURE - IWG
1
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
CFM
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1200 908 0.34 994 0.45 1072 0.55 1145 0.64 1214 0.74 1283 0.83 1352 0.92 1424 1.01 1502 1.11 1586 1.20
1300 921 0.40 1007 0.51 1085 0.61 1158 0.70 1227 0.80 1296 0.89 1365 0.98 1437 1.07 1514 1.17 1599 1.26
1400 938 0.47 1023 0.58 1101 0.68 1174 0.77 1244 0.86 1312 0.96 1382 1.05 1454 1.14 1531 1.23 1616 1.33
1500 959 0.55 1044 0.65 1122 0.75 1195 0.85 1265 0.94 1333 1.03 1403 1.12 1475 1.21 1552 1.31 1637 1.41
1600 985 0.63 1070 0.73 1148 0.83 1221 0.93 1290 1.02 1359 1.11 1428 1.20 1500 1.29 1578 1.39 -- --
1700 1015 0.71 1100 0.82 1179 0.92 1251 1.01 1321 1.11 1389 1.20 1459 1.29 1531 1.38 1608 1.48 -- --
1800 1050 0.81 1136 0.91 1214 1.01 1287 1.11 1356 1.20 1425 1.29 1494 1.39 1566 1.48 1644 1.57 -- --
1900 1091 0.91 1176 1.02 1254 1.12 1327 1.21 1397 1.31 1465 1.40 1534 1.49 1607 1.58 -- -- -- --
2000 1136 1.02 1222 1.13 1300 1.23 1372 1.32 1442 1.42 1510 1.51 1580 1.60 -- -- -- -- -- --
Medium Static Option with Motor rated at 2.4-hp
High Static Option with Motor rated at 2.4-hp
Field supplied AK41 x 3/4" fixed blower pulley with Motor rated at 2.4-hp
-- Exceeds recommended blower speed
1 Blower performance includes gas heat exchangers and 2” filters. See STATIC RESISTANCE table for additional applications. Note:
See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. kW = 0.929
x BHP
Table 23: Example RPM Selection
Model Size (Tons)
Airflow
Option
Phase Max BHP
Blower
Sheave Motor
Sheave
6 Turns
Open
5 Turns
Open
4 Turns
Open
3 Turns
Open
2 Turns
Open
1 Turns
Open
Fully
Closed
Std. Direct Drive
Med. 1 1.5 AK46 1VL34 N/A 792 875 958 1042 1125 1208
Med. 3 2.4 AK46 1VL34 N/A 792 875 958 1042 1125 1208
ZQ 05 (4)
H. Static 3 2.4 AK46 1VL44 N/A 1167 1250 1333 1417 1500 1593
Table 24: Example Additional Static Resistance
Electric Heat kW
2
Model Size Tons CFM Cooling Only
1
Economizer
2,3
4” Filter
2
6/6.5 9.2/10.5/11 13.8/14/16 23
1200 0.07 0.06 --- 0.01 0.01 0.02 0.03
1300 0.10 0.07 --- 0.01 0.01 0.03 0.03
1400 0.12 0.08 --- 0.02 0.02 0.03 0.04
1500 0.14 0.08 --- 0.02 0.02 0.04 0.04
1600 0.16 0.09 --- 0.02 0.02 0.04 0.05
1700 0.18 0.10 --- 0.03 0.03 0.05 0.05
1800 0.22 0.11 --- 0.03 0.03 0.05 0.06
1900 0.25 0.12 --- 0.04 0.04 0.06 0.07
ZQ 05 (4.0)
2000 0.28 0.13 --- 0.04 0.04 0.07 0.08
INSTALLATION MANUAL ZQ SERIES 3 - 5 ton 60 Hertz R-410A 46
Johnson Controls Ducted Systems