Airflow Performance - York International ZQ Series Installation Manual

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

Airflow Performance

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