BOC 203

Credits: 2
Lecture: 12 hrs
Project: 6 hrs
Group Exercises: 2 hrs
Total: 20 hrs

Prerequisites: Students will have completed BOC Level I series. Students should also have an at least a basic understanding of their own facility heating and cooling system and be prepared to access it to fulfill course objectives.

Learning Outcomes/Competencies:
At the completion of the HVAC Systems Troubleshooting & Maintenance, a participant will:

  • understand of a variety of facility heating & cooling systems.
  • recommend energy saving practices as they apply to HVAC systems and controls.
  • know the dynamic relationship between various loads and machinery
  • identify tools used in calibrating and calculating airflow.
  • troubleshoot and maintain HVAC systems.
  • apply more specific knowledge in repair situations.
  • successfully complete the facility project assignment.

Texts:  STUDENT HANDBOOK: BOC 203 – HVAC Systems Troubleshooting & Maintenance, plus course handouts

Special Equipment for Instructors: None.


a. Test 50%
b. Facility project assignment 50%

BOC 203 – HVAC Systems Troubleshooting & Maintenance: Course Outline


1. Introduction and overview

2. Boiler Operations

a. Review
b. Range of operations

3. Boiler Control and Optimization of Operation

a. Excess air
b. Scale and deposits
c. Blowdown losses
d. Waste heat recovery
e. Matching load conditions

4. Boiler Maintenance

a. Strategies
b. Instrumentation and test equipment

5. Steam Systems

a. Distribution
b. Supply piping
c. Steam traps
d. Condensate return
e. System troubleshooting

6. Hot Water Systems

a. Piping and pumping
b. Troubleshooting

7. Water Treatment

a. Impurities
b. Types of treatment

8. Air conditioning

a. Refrigeration review
b. Refrigeration cycle and controls
c. Air-cooled equipment
d. Water-cooled equipment
e. Troubleshooting equipment

9. Chilled water systems

a. Coil control
b. Increasing chiller efficiency

10. Cooling Towers

a. Optimizing operation
b. Maintenance


11. Heat Pumps

a. Layout
b. Balance point

12. Fan Systems

a. Fan laws
b. Variable volume fan controls
c. VV fan efficiency
d. Air filtration
e. Fan system maintenance

13. Air/ Water Economizers

a. Economizer cooling
b. Evaporative cooling

14. Heat Recovery Systems

15. Control Optimization

16. Air System Distribution

17. Duct Sealing and Insulation

18. HVAC Sizing and Design

a. Sample calculation

19. TAB: Testing, Adjusting, and Balancing

a. Purpose
b. Airflow measuring instruments
c. Troubleshooting instruments

20. Commissioning HVAC Systems

Facility Project Assignment

HVAC Troubleshooting and Maintenance – System Comparison

Learning Objective: Understand and evaluate system conditions and capacity to determine whether or not O&M can satisfy occupant requirements.

1. The assignment is an exercise to compare original design and operating conditions to actual conditions that exist in the facility.

2. Compare the original settings to the current operating conditions. What items can be controlled or adjusted, and what items need system alterations? How has the facility demands changed, and what alteration, improvements or changes have been made to the HVAC.