4.9 M otor I nstallation
Couplings, drive belts, chains or other mounted devices must be in proper alignment, balanced and secure for safe motor operation. 4.9.1 M ounting This motor must be securely mounted. Sufficient ventilation must be provided to insure proper operation. 4.9.2 I nstall S heaves A nd F an B elts
1. The fan sheave (A) and motor sheave (B) must be in axial alignment. Shafts must be parallel in both vertical and horizontal planes. 2. The sheaves must be in radial alignment. When sheaves are of equal width, align with a straightedge (C). When sheaves are of unequal width, align center of sheaves. 3. Check fan belts for proper tension and for signs of wear. Belt should have a slight sag at bottom of sheaves. Belt (D) is properly adjusted. Belt (E) is too loose. Belt (F) is too tight.
A
C
B
F
D E
4.9.3 E lectrical
^ WARNING
Prevent serious injury or death. Electrical installations must be performed by qualified electricians. Installation must conform to all national, local, and provincial codes and standards.
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