An incorrectly aligned and tensioned belt can substantially shorten belt life or overload blower and motor bearings, shortening their life expectancy. A belt tensioned too tightly can overload the motor electrical, causing nuisance tripping of the motor overloads and/or motor failure and/or shaft failure.
Belt Replacement
Always replace belts as a set. Follow the steps below to replace belts:
1.Release the tension on the belts by loosening the adjusting nuts on the fan motor.
2.Remove old belts and recheck the sheave alignment with a straight edge.
3.Install the new belts on the sheaves.
Never place the belts on the sheaves by using a screwdriver to pry the belt over the rim of the sheave. This will permanently damage the belts.
FORM
| LD06354 |
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| FIG. |
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Belt Tensioning: |
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Belt tension information is included on the fan skid data |
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plate as shown in Figure. |
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4.3 lbs pressure at .30 inches deflection. |
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A Browning Belt tension gauge is used in Figure. |
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4 | ||||
to properly tension belts. | ||||
00494vip
FIG. 4-2 – FAN DATA PLATE - BELT TENSION
JOHNSON CONTROLS | 57 |
