Adjustable motor base for an HVAC&R blower motor

1. An HVAC&R system, comprising:

a chiller;

a heating system;

an air conditioning unit;

and air inlet duct for providing outside air to the conditioning unit;

an air discharge duct for distributing air conditioned by the conditioning unit; and

a blower unit;

wherein the blower unit comprises

a fan unit disposed within a fan unit support frame, the fan unit support frame having a top surface;

a motor attached to an adjustable motor base,

the adjustable motor base comprising:

a motor mounting section comprising a top surface including slots for adjusting the horizontal position of the motor; and

a frame mounting section comprising a bottom panel;

wherein the motor is secured to the top surface of the motor mounting section of the adjustable motor base and the bottom panel of the frame mounting section is secured to the top surface of the fan support frame, and

wherein the vertical distance between the top surface of the motor mounting section and the bottom panel of the frame mounting section is adjustable.

2. The system of claim 1 , wherein the vertical distance is adjusted by adjusting vertical adjustment bolts configured between the top surface and the bottom panel.

3. The system of claim 1 , wherein the frame mounting section further includes a front panel, side panels and a rear panel, the front panel and the rear panel comprising slots configured to receive bolts engaged in the motor mounting section for securely positioning the motor mounting section at a predetermined adjustable height from the bottom panel of the frame mounting section.

4. The system of claim 1 , wherein the fan unit comprises a plenum fan.

5. The system of claim 1 , wherein the motor comprises a motor shaft attached to a motor shaft pulley that engages a drive belt that urges a fan shaft pulley attached to a fan shaft to rotate a fan when the motor is activated.

6. The system of claim 5 , wherein the fan is plenum fan.

7. A blower unit for an HVAC&R system, comprising:

a fan unit disposed within a fan unit support frame, the fan unit support frame having a top surface;

a motor attached to an adjustable motor base,

the adjustable motor base comprising:

a motor mounting section comprising a top surface including slots for adjusting the horizontal position of the motor; and

a frame mounting section comprising a bottom panel;

wherein the motor is secured to the top surface of the motor mounting section of the adjustable motor base and the bottom panel of the frame mounting section is secured to the top surface of the fan support frame, and

wherein the vertical distance between the top surface of the motor mounting section and the bottom panel of the frame mounting section is adjustable.

8. The unit of claim 7 , wherein the vertical distance is adjusted by adjusting vertical adjustment bolts configured between the top surface and the bottom panel.

9. The unit of claim 7 , wherein the frame mounting section further includes a front panel, side panels and a rear panel, the front panel and the rear panel comprising slots configured to receive bolts attached to the motor mounting section for securely positioning the motor mounting section at a predetermined adjustable height from the bottom panel of the frame mounting section.

10. The unit of claim 7 , wherein the fan unit comprises a plenum fan.

11. The unit of claim 7 , wherein the motor comprises a motor shaft attached to a motor shaft pulley that engages a drive belt that urges a fan shaft pulley attached to a fan shaft to rotate a fan when the motor is activated.

12. The unit of claim 11 , wherein the fan is plenum fan.

13. A method of adjusting the tension of a belt of a blower assembly of an HVAC&R system, comprising:

providing a fan unit disposed within a fan unit support frame, the fan unit support frame having a top surface;

providing a motor attached to an adjustable motor base,

the adjustable motor base comprising:

a motor mounting section comprising a front side, a rear side, and a top surface including slots for adjusting the horizontal position of the motor; and

a frame mounting section comprising a front panel, a rear panel, and a bottom panel;

wherein the motor is secured to the top surface of the motor mounting

section of the adjustable motor base and the bottom panel of the frame mounting section is secured to the top surface of the fan support frame, and

wherein the vertical distance between the top surface of the motor mounting section and the bottom panel of the frame mounting section is adjustable by adjusting vertical height adjustment bolts configured between the top surface and the bottom surface; and

adjusting the vertical height adjustment bolts to obtain a desired amount of tension in the belt.

14. The method of claim 13 , wherein a plurality of vertical height adjustment bolts are disposed around a perimeter of the top surface.

15. The method of claim 13 , wherein two vertical height adjustment bolts are disposed proximate to the front side of the motor mounting section, and one vertical height adjustment bolts are disposed proximate to the rear side of the motor mounting section.

16. The method of claim 13 , further comprising:

adjusting bolts received in slots disposed in the front panel and further received in holes in the front side; and

adjusting bolts received in slots disposed in the rear panel and further received in holes in the rear side to the rear side to secure the top surface at a fixed vertical height from the bottom panel.

17. The method of claim 13 , wherein the fan is plenum fan.