Before locking the motor is position, check the alignment of pulleys with a straight edge to conserve belt
life as well as to eliminate the possibility of unnecessary noise.
If the belt is not tight enough, and if not corrected, could result in slippage causing loss of fan speed and
belt failure through wear.
If the belt is too tight, and if not slackened somewhat could cause noise from excessive vibration,
premature bearing failure and shorter belt life.
Efficiency is another reason to properly adjust belt tension. Excessive belt tension can create such a power
demand as to actually overload a motor that otherwise would be quite adequate.
A belt should be just tight enough to avoid slippage.
30
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Air Handling Unit Installation, Operation And Maintenance Instructions
Belt section
SPZ
SPA
SPB
SPC
Small pulley diameter,
mm
56
to
95
1,3
to
2,0
100
to
130
2,0
to
2,5
80
to
132
140
to
200
112
to
224
236
to
315
224
to
355
375
to
560
2,5
to
3,6
3,6
to
4,6
4,6
to
6,6
6,6
to
8,7
8,7
to
11,7
11,7
to
15,3
13
to
20
20
to
25
25
to
35
35
to
45
45
to
65
65
to
85
85
to
115
115
to
150
Tensioning
force,
F
kg
N
DEFLECTION
CENTER DISTANCE
F
SMALL
PULLEY
Содержание FourSeason KKS 062 - 046
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