Title: Lab Assignment
Course: HET 230 - Spring 2015 > Section: HET 230 - Spring 2015

Lab Assignment

page 1
Lab Assignment

HET 230 Week 8 Lab; drive & driven sheave Calculations

Name _______________________ Date _________________

Upon completion, using basic hand tools, amp probe, volt meter, tachometer, and calculator, you will be able to remove drive and driven sheaves, align sheaves and measure the consequences of your actions. Practice good safety habits.  An air conditioning and refrigeration technician is exposed to many hazards.  It is essential that he/she constantly be aware of these hazards and to develop good safety habits to minimize unsafe situations.

Finding an Air Handling Unit or Drive a Driven Trainer, preform the following tasks:

1. Remove driven sheave. What type of locking device is used?

1. Remove drive sheave. What type of locking device is used?

1. Reassemble both sheaves onto fan / drive & align sheaves. What did you use to align the sheaves?

3-a. What would the consequences be of a misaligned sheave?

3-b. What would the consequences be of an over tensioned belt?

3-c. What would the consequences be of an over tensioned belt?

1. Measure:

Motor RPM:

Fan RPM:

Motor Current:

1. Adjust drive sheave inward

5-a. Consequences to:

Motor RPM

Fan RPM

Motor Current

Air Flow

Drive Belt

1. Adjust drive sheave outward

6-a. Consequences to:

Motor RPM

Fan RPM

Motor Current

Air Flow

Drive Belt

1. Block leaving or entering air to the fan.

7-a.  Consequences to:

Air Flow

Motor RPM

Fan RPM

Motor Current

1. Describe your conclusions to this exercise.

Please download the following lab assignment and complete.
- HET 230 Week 8 Lab_Drive and Driven Calcualtions.doc (31.23 KB)