Daikin Destiny VFD Series Installation And Maintenance Manual page 51

Table 37: Screw Torque Values
Socket head cap screws
Nominal screw
size, (dia-thds/in)
Seating torque
(in-lbs)
1/4-20NC 150
5/16-11NC 305
3/8-16NC 545
1/2-13NC 1300
5/8-11NC N/A
Table 38: Belt Deflection Force
Sheave diameter (inches)
Cross section
Smallest sheave
diameter range
3.0 to 3.6
A, AX 3.8 to 4.8
5.0 to 7.0
3.4 to 4.2
B, BX 4.4 to 5.6
5.8 to 8.6
4.4 to 6.7
5V, 5VX
7.1 to 10.9
11.8 to 16.0
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Flat head socket
screws
Seating torque
(ft-lbs) (in-lbs)
12.5 100
25.4 200
45.4 350
108.3 N/A
N/A N/A
Cross section A, B, 5V
RPM range
Min
1000 to 2500 2.8
2501 to 4000 2.1
1000 to 2500 3.4
2501 to 4000 2.4
1000 to 2500 4.0
2501 to 4000 3.5
850 to 2500 —
2501 to 4000 —
860 to 2500 4.0
2501 to 4000 3.3
860 to 2500 4.7
2501 to 4000 4.5
500 to 1749 —
1750 to 3000 —
3001 to 4000 —
500 to 1740 9.5
1741 to 3000 8.3
500 to 1740 11.7
1741 to 3000 10.5
51
Service and Maintenance
Hollow head setscrews only
Lengths equal or greater than
diameter
Seating torque
(in-lbs) (ft-lbs)
87 7.3
165 13.8
290 24.2
620 51.7
1225 102.1
Deflection force (lbs)/belt deflection force
Max
5.5
4.2
6.8
5.7
8.0
7.0
—
—
7.9
6.7
9.4
8.9
—
—
—
18.9
16.7
23.4
21.8
IM 782-12 • DESTINY AIR HANDLERS
For lengths (L) less than diameter
Length (L) Seating torque
(in) (in-lbs)
3/16 50
1/4 90
1/4, 5/16 150, 250
N/A N/A
N/A N/A
Cross section AX, BX, 5VX
Min Max
3.0 6.1
2.5 5.0
3.7 7.4
3.2 6.4
4.7 9.4
3.8 7.6
3.6 7.2
3.1 6.2
5.2 10.5
4.5 9.1
6.3 12.6
5.4 10.9
7.6 15.2
6.6 13.2
4.2 8.5
11.0 22.1
10.0 20.1
12.7 25.5
12.5 25.0