Lennox LCH092H Unit Information page 47

Check Belt Tension
Overtensioning belts shortens belt and bearing life. Check
belt tension as follows:
1 Measure span length X. See figure 19.
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.
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 new 2 and 3hp belt,
the deflection force should be 5.0-7.0 lbs. (35-48kPa).
For a new 5hp belt, the deflection force should be
7-10lbs. (48-69kPa).
A force below these values indicates an underten­
sioned belt. A force above these values indicates an
overtensioned belt.
Motor Pulley
Drive No.
Supplier No.
A01 1VP34x7/8
A02 1VP34x7/8
A03 1VP34x7/8
A05 1VP34x7/8
A06 1VP44x7/8
A07 1VP50x7/8
AA01 1VP34x7/8
AA02 1VP40x7/8
AA03 1VP40x7/8
AA04 1VP44x7/8
2
A01T 1VP34x7/8
2
A02T 1VP34x7/8
2
A03T 1VP34x7/8
2
A05T 1VP34x7/8
2
A06T 1VP44x7/8
2
A07T 1VP50x7/8
2
AA01T 1VP34x7/8
2
AA02T 1VP40x7/8
2
AA03T 1VP40x7/8
2
AA04T 1VP44x7/8
1
NOTES: Requires split taper bushing, Browning no. H1; OEM no. 100073-04
MANUFACTURER'S NUMBERS
OEM Part No. Supplier No.
31K6901 AK54 x 1
31K6901 AK49 x 1
31K6901 AK44 x 1
31K6901 AK41 x 1
P-8-1488 AK51 x 1
P-8-2187 AK54 x 1
31K6901 AK69 x 1
1
79J0301 BK80H
79J0301 AK59 x 1
P-8-1488 AK59 x 1
31K6901 AK54 x 1
31K6901 AK49 x 1
31K6901 AK44 x 1
31K6901 AK41 x 1
P-8-1488 AK51 x 1
P-8-2187 AK54 x 1
31K6901 AK69 x 1
79J0301 BK80H*
79J0301 AK59 x 1
P-8-1488 AK59 x 1
MEASURE BELT TENSION
DEFLECTION 1/64" PER INCH OF SPAN
OR 1.5mm PER 100mm OF SPAN
F-Field-Furnished Blower Drives
For field-furnished blower drives, use the the blower tables
in the BLOWER TABLES section of this manual to deter­
mine BHP, RPM and drive kit required. Reference table 2
for drive component manufacturer's numbers.
TABLE 2
DRIVE COMPONENTS
Blower Pulley
OEM Part No.
100244-19
100244-18
100244-16
100244-15
18L2201
100244-19
37L4701
100788-03
31K6801
31K6801
100244-19
100244-18
100244-16
100244-15
18L2201
100244-19
37L4701
100788-03
31K6801
31K6801
2
Includes tension assembly, Fenner no. FS0590; OEM no. 101994-02
Page 47
FORCE
FIGURE 19
Belt
Supplier No. OEM Part No.
A40 100245-17
A39 100245-16
A39 100245-16
A39 100245-16
A41 100245-18
AX43 73K8201
AX51 13H0101
A53 P-8-4951
A50 100245-29
AX51 13H0101
A41 100245-18
A40 100245-17
A40 100245-17
A41 100245-18
A41 100245-18
AX43 73K8201
A50 100245-29
A52 100245-30
A49 100245-32
A50 100245-29