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A belt tensioning system for a motor and a belt-driven blower each secured inside an air handling unit. The blower rotatably carries a first shaft, a first sheave and a bladed arrangement being secured to the first shaft. A second sheave secured to a second shaft is rotatably carried by the motor. A

A belt tensioning system for a motor and a belt-driven blower each secured inside an air handling unit. The blower rotatably carries a first shaft, a first sheave and a bladed arrangement being secured to the first shaft. A second sheave secured to a second shaft is rotatably carried by the motor. A belt engaging the periphery of the first sheave and the second sheave urges the first sheave to rotate about the first shaft in response to the motor urging the second sheave to rotate about the second shaft. An adjuster having adjustment means is secured to the structure. Actuating the adjustment means in a direction urges the motor either toward the adjuster or away from the adjuster to vary the distance between the first sheave and the second sheave to vary the tension in the belt.

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What is claimed is: 1. A belt tensioning system for an air handling unit comprising: a blower having a housing adjustably securable to a structure inside the air handling unit, the housing rotatably carrying a first shaft about a first axis, at least one of the housing and the motor comprises a pla

What is claimed is: 1. A belt tensioning system for an air handling unit comprising: a blower having a housing adjustably securable to a structure inside the air handling unit, the housing rotatably carrying a first shaft about a first axis, at least one of the housing and the motor comprises a platform interposed between the at least one of the housing and the motor and the structure, the platform being adjustably securable to the structure, the platform having a pair of threaded apertures, each of the pair of threaded members is received by one of the pair of threaded apertures, the platform comprises opposed standoff members, the standoff members extending to opposed flange members, the flange members configured to be adjustably securable to the structure, wherein the platform comprises a pair of blocks secured adjacent opposite ends of the flap member facing the adjuster; a first sheave and a bladed arrangement secured to the first shaft; a second sheave secured to a second shaft rotatably carried by a motor about a second axis, the motor adjustably securable to the structure; a belt engaging the periphery of the first sheave and the second sheave; wherein the belt urging the first sheave and the bladed arrangement to rotate about the first shaft in response to the motor urging the second sheave to rotate about the second shaft; an adjuster secured to the structure adjacent to at least the blower and the motor, and the adjuster having adjustment means secured to one of the motor when the adjuster is adjacent the motor, the adjustment means secured to the housing when the adjuster is adjacent the blower; and wherein actuating the adjustment means to urge at least a portion of one of the housing and the motor in a direction to vary the distance between the first sheave and the second sheave to adjust the tension in the belt. 2. The belt tensioning system of claim 1 wherein the adjustment means is a pair of threaded members. 3. The belt tensioning system of claim 1 wherein the platform defines a hat section profile. 4. The belt tensioning system of claim 3 wherein the platform comprises a pair of blocks secured to the platform, each block having one threaded aperture of the pair of threaded apertures. 5. The belt tensioning system of claim 4 wherein the pair of blocks is secured adjacent to opposite ends of a side of the platform facing the adjuster. 6. The belt tensioning system of claim 1 wherein each of the flange members comprising at least one slot. 7. A belt tensioning system for an air handling unit comprising: a blower having a housing adjustably securable to a structure inside the air handling unit, the housing rotatably carrying a first shaft about a first axis, at least one of the housing and the motor comprises a platform interposed between the at least one of the housing and the motor and the structure, the platform being adjustably securable to the structure, the platform having a pair of threaded apertures, each of the pair of threaded members is received by one of the pair of threaded apertures, the platform comprises opposed standoff members, the standoff members extending to opposed flange members, the flange members configured to be adjustably securable to the structure, the platform comprising a pair of blocks secured adjacent opposite ends of the flap member facing the adjuster, wherein each block of the pair of blocks is secured adjacent to one end of one of the standoff members; a first sheave and a bladed arrangement secured to the first shaft; a second sheave secured to a second shaft rotatably carried by a motor about a second axis, the motor adjustably securable to the structure; a belt engaging the periphery of the first sheave and the second sheave; wherein the belt urging the first sheave and the bladed arrangement to rotate about the first shaft in response to the motor urging the second sheave to rotate about the second shaft; an adjuster secured to the structure adjacent to at least the blower and the motor, and the adjuster having adjustment means secured to one of the motor when the adjuster is adjacent the motor, the adjustment means secured to the housing when the adjuster is adjacent the blower; and wherein actuating the adjustment means to urge at least a portion of one of the housing and the motor in a direction to vary the distance between the first sheave and the second sheave to adjust the tension in the belt. 8. The belt tensioning system of claim 1 wherein the adjuster comprises containing means to decrease the belt tension. 9. The belt tensioning system of claim 8 wherein the containing means is a retaining ring.