York International ZX Series, Руководство по установке

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RPM selection
Table 34: 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. 3 2.4 AK51 1VL34 N/A 707 782 856 931 1005 1080
Med. 3 2.9 AK51 1VL44 N/A 1043 1117 1191 1266 1340 1415 ZX A7 (6)
H. Static 3 3.7 AK51 1VP50 N/A 1266 1340 1415 1489 1564 1638
Std. 3 2.4 AK74 1VL34 N/A 475 525 575 625 675 725
Med. 3 2.9 AK74 1VL44 N/A 700 750 800 850 900 950 ZX 08 (7.5)
H. Static 3 3.7 AK74 1VP50 N/A 850 900 950 1000 1050 1100
Std. 3 2.4 AK74 1VL34 N/A 475 525 575 625 675 725
Med. 3 2.4 AK74 1VL44 N/A 700 750 800 850 900 950 ZX 9 (8.5)
H. Static 3 3.7 AK74 1VP50 N/A 850 900 950 1000 1050 1100
Std. 3 2.4 AK79 1VL44 N/A 653 700 747 793 840 887
Med. 3 3.7 AK79 1VP50 N/A 793 840 887 933 980 1027 ZX 12 (10)
H. Static 3 5.25 BK85 1VP56 953 997 1041 1085 1130 1174 N/A
Std. 3 2.9 AK79 1VL44 N/A 653 700 747 793 840 887
Med. 3 3.7 AK79 1VP50 N/A 793 840 887 933 980 1027 ZX 14 (12)
H. Static 3 5.25 BK85 1VP56 953 997 1041 1085 1130 1174 N/A
Table 35: Indoor Blower Specifications
Motor Motor Sheave Blower Sheave
Model Size (Tons)
Airflow
Option Phase
MAX
BHP
RPM Eff. SF Frame Datum Dia. (in.) Bore (in.) Model Datum Dia. (in.) Bore (in.) Model
Belt
Std. 3 2.4 1725 0.80 1.15 56Y 1.9 - 2.9 5/8 1VL34 4.7 3/4 AK51 A39
Med. 3 2.9 1725 0.81 1.15 56Y 2.8 - 3.8 7/8 1VL44 4.7 3/4 AK51 A40 ZX A7 (6)
H. Static 3 3.7 1725 0.84 1.15 56HZ 3.4 - 4.4 7/8 1VP50 4.7 3/4 AK51 A41
Std. 3 2.4 1725 0.80 1.15 56Y 1.9 - 2.9 5/8 1VL34 7.0 1 AK74 A47
Med. 3 2.9 1725 0.81 1.15 56Y 2.8 - 3.8 7/8 1VL44 7.0 1 AK74 A48 ZX 08 (7.5)
H. Static 3 3.7 1725 0.84 1.15 56HZ 3.4 - 4.4 7/8 1VP50 7.0 1 AK74 A50
Std. 3 2.4 1725 0.80 1.15 56Y 1.9 - 2.9 5/8 1VL34 7.0 1 AK74 A47
Med. 3 2.4 1725 0.80 1.15 56Y 2.8 - 3.8 5/8 1VL44 7.0 1 AK74 A48 ZX 09 (8.5)
H. Static 3 3.7 1725 0.84 1.15 56HZ 3.4 - 4.4 7/8 1VP50 7.0 1 AK74 A50
Std. 3 2.4 1725 0.80 1.15 56Y 2.8 - 3.8 5/8 1VL44 7.5 1 AK79 A50
Med. 3 3.7 1725 0.84 1.15 56HZ 3.4 - 4.4 7/8 1VP50 7.5 1 AK79 A50 ZX 12 (10)
H. Static 3 5.25 1725 0.84 1.15 145TY 4.3 - 5.3 7/8 1VP56 7.9 1 BK85 BX52
Std. 3 2.9 1750 0.87 1.15 56Z 2.8 - 3.8 7/8 1VL44 7.5 1 AK79 A50
Med. 3 3.7 1750 0.90 1.15 184TZ 3.4 - 4.4 7/8 1VP50 7.5 1 AK79 A52 ZX 14 (12.5)
H. Static 3 5.25 1750 0.90 1.15 184TZ 4.3 - 5.3 7/8 1VP56 7.9 1 BK85 BX54
Supply Air Drive Adjustment
CAUTION
Before making any blower speed changes review
the installation for any installation errors, leaks or
undesirable systems effects that can result in loss
of airflow.Even small changes in blower speed can
result in substantial changes in static pressure and
BHP. BHP and AMP draw of the blower motor will
increase by the cube of the blower speed. Static
pressure will increase by the square of the blower
speed. Only qualified personnel should make blower
speed changes, strictly adhering to the fan laws.
At unit start-up, the measured CFM may be higher
or lower than the required CFM. To achieve the
required CFM, the speed of the drive may have
adjusted by changing the datum diameter (DD) of
the variable pitch motor sheave as described below:
Use the following tables and the DD calculated per
the above equation to adjust the motor variable
pitch sheave.
EXAMPLE NEW DATUM DIAMETER
A 12.5 ton unit was selected to deliver 4,000 CFM
with a 3 HP motor, but the unit is delivering 3,800
CFM. The variable pitch motor sheave is set at 2
turns open.
Use the equation to determine the required DD for
the new motor sheave,
INSTALLATION MANUAL ZX SERIES 6 - 12.5 Ton 60 Hertz R-410A 68
Johnson Controls Ducted Systems