|Group Exercises:||2 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.
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
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
b. Instrumentation and test equipment
5. Steam Systems
b. Supply piping
c. Steam traps
d. Condensate return
e. System troubleshooting
6. Hot Water Systems
a. Piping and pumping
7. Water Treatment
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
11. Heat Pumps
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
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.