Lennox LCH060H4E

Page 40
G-Check Belt Tension
Overtensioning belts shortens belt and bearing life. Check
belt tension as follows:
1- Measure span length X. See figure 12.
2- Apply perpendicular force to center of span (X) with
enough pressure to deflect belt 1/64” for every inch of
span length or 1.5mm per 100mm of span length.
MEASURE BELT TENSION
FIGURE 12
DEFLECTION 1/64” PER INCH OF SPAN
OR 1.5mm PER 100mm OF SPAN
FORCE
Example: Deflection distance of a 40” span would be
40/64” or 5/8”.
Example: Deflection distance of a 400mm span would
be 6mm.
3- Measure belt deflection force. For a used belt, the
deflection force should be 5 lbs. (35kPa). A new belt
deflection force should be 7 lbs. (48kPa).
A force below these values indicates an underten
sioned belt. A force above these values indicates an
overtensioned belt.
H-Field-Furnished Blower Drives
For field-furnished blower drives, use Page 11 through
Page 18 to determine BHP and RPM required. Reference
table 4 to determine the drive kit number.
TABLE 4
MANUFACTURER'S DRIVE COMPONENT NUMBERS
Drive No.
DRIVE COMPONENTS
Motor Pulley Blower Pulley Belt
Supplier No. OEM Part No. Supplier No. OEM Part No. Supplier No. OEM Part No.
A01 1VP34x7/8 31K6901 AK54 x 1 100244-19 A40 100245-17
A02 1VP34x7/8 31K6901 AK49 x 1 100244-18 A39 100245-16
A03 1VP34x7/8 31K6901 AK44 x 1 100244-16 A39 100245-16
A05 1VP34x7/8 31K6901 AK41 x 1 100244-15 A39 100245-16
A06 1VP44x7/8 P-8-1488 AK51 x 1 18L2201 A41 100245-18
A07 1VP50x7/8 P-8-2187 AK54 x 1 100244-19 AX43 73K8201
AA01 1VP34x7/8 31K6901 AK69 x 1 37L4701 AX51 13H0101
AA02 1VP40x7/8 79J0301 BK80H
1
100788-03 A53 P-8-4951
AA03 1VP40x7/8 79J0301 AK59 x 1 31K6801 A50 100245-29
AA04 1VP44x7/8 P-8-1488 AK59 x 1 31K6801 AX51 13H0101
A01T
2
1VP34x7/8 31K6901 AK54 x 1 100244-19 A41 100245-18
A02T
2
1VP34x7/8 31K6901 AK49 x 1 100244-18 A40 100245-17
A03T
2
1VP34x7/8 31K6901 AK44 x 1 100244-16 A40 100245-17
A05T
2
1VP34x7/8 31K6901 AK41 x 1 100244-15 A41 100245-18
A06T
2
1VP44x7/8 P-8-1488 AK51 x 1 18L2201 A41 100245-18
A07T
2
1VP50x7/8 P-8-2187 AK54 x 1 100244-19 AX43 73K8201
AA01T
2
1VP34x7/8 31K6901 AK69 x 1 37L4701 A50 100245-29
AA02T
2
1VP40x7/8 79J0301 BK80H* 100788-03 A52 100245-30
AA03T
2
1VP40x7/8 79J0301 AK59 x 1 31K6801 A49 100245-32
AA04T
2
1VP44x7/8 P-8-1488 AK59 x 1 31K6801 A50 100245-29
NOTES:
1
Requires split taper bushing, Browning no. H1; OEM no. 100073-04
2
Includes tension assembly, Fenner no. FS0590; OEM no. 101994-02