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Center for Curriculum and Transfer Articulation
Facilities Air Conditioning Systems Lab
Course: HVA210LL

First Term: 2012 Spring
 Laboratory   1 Credit(s)   3 Period(s)   2.4 Load  
Subject Type: Occupational
Load Formula: S


Description: Routine procedures on operational central forced-air conditioning systems and hydronic pumping systems. Components and function of large chillers, cooling towers, hot water boilers, associated piping, pumps and constant volume and variable air volume (VAV) air handlers. Perform pump sizing calculations and measurements. Perform measurements and calculations of pressure and air velocity in ducts. Apply the principles of psychometrics to central air handling systems. Evaluation of the energy balance of components and systems. Personal and equipment safety.



MCCCD Official Course Competencies
1. Define the periodic and preventative maintenance procedures for central air handling systems. (I)
2. Locate and explain the function of components of specific unitary and central air-conditioning systems. (I, II)
3. Perform pump sizing measurements and calculations. (I, II, III)
4. Locate and explain the function of components of specific air and water air-conditioning systems. (III)
5. Explain the general start-up procedures for a chilled water air conditioning system. (III)
6. Describe specific start-up procedures for chillers using scroll, reciprocating, rotary screw and centrifugal compressors. (III)
7. Define the periodic and preventative maintenance procedures for each type of chiller. (III)
8. Locate and explain the function of components of a hot water boiler system. (IV)
9. Perform Rounds and Readings on operating air and water systems including chilled water, condenser water, boiler, chiller and air handlers. (V)
10. Measure static pressure, velocity pressure, and total pressure in specific ducts. (VI)
11. Calculate air velocity and cubic feet per minute (CFM) in specific ducts. (VI)
12. Evaluate air conditioning systems for energy balance using the principles of psychrometrics. (VII)
13. Trace and calculate the thermodynamics of an air and water system from the heat source through a building`s air and water systems. (VII)
MCCCD Official Course Competencies must be coordinated with the content outline so that each major point in the outline serves one or more competencies. MCCCD faculty retains authority in determining the pedagogical approach, methodology, content sequencing, and assessment metrics for student work. Please see individual course syllabi for additional information, including specific course requirements.
 
MCCCD Official Course Outline
I. Components and Function of Central Forced-Air Systems
   A. Supply and return fans
   B. Mixing damper section
   C. Filter section
   D. Coil section
   E. Supply duct
   F. Return duct
   G. Balancing dampers
   H. Supply diffuser
   I. Return grills
   J. Terminal units
      1. variable air volume (VAV)
      2. VAV with reheat
      3. Induction VAV
II. Fan Coil Units
   A. Unitary air-conditioning systems
   B. Central air-conditioning systems
III. Components and Function of Air and Water Systems
   A. Chillers ( reciprocation and centrifugal)
      1. compressor
      2. methods of unloading
      3. exchanger / condenser
      4. exchanger / evaporator
      5. metering device
      6. cw (chilled water) supply connection
      7. cw return connection
      8. condenser water supply connection
      9. condenser water return connections
      10. expansion tank
      11. controls
   B. Pumps / condenser
   C. Pump / chilled water
   D. Balancing valves
   E. Cooling tower
      1. fan
      2. water distributor
      3. fill (media)
      4. water make up
   F. Chilled water supply and return
IV. Boiler
   A. Fuel
   B. Heat exchanger
   C. Burner and controls
   D. Pump
   E. Supply and return system
   F. Expansion tank
V. Rounds and Readings for Air and Water Systems
   A. Chiller refrigerant pressures
   B. CW supply and return temperatures
   C. Hot water supply and return temperatures
   D. Air Handler supply and return temperatures
   E. Air Handler mixed air percentage (using the Psychrometric Chart)
   F. Humidification (using the Psychrometric Chart)
   G. Filter static pressure drop
VI. Measuring and Calculating Air Flow
   A. Types of air measuring meters
      1. velometer
      2. incline manometer
      3. magnehlic
      4. other
   B. Pressure
      1. velocity
      2. static
      33. total
   C. Calculate
      1. velocity
      2. cubic feet per minute (cfm)
VII. Energy Balance for Air and Water Equipment
   A. Evaporator (chiller)
      1. gpm (gallon per minute flow)
      2. difference in temperature (TD)
      3. calculate BTU
   B. Air handlers (air to coil)
      1. enthalpy difference (using the psychrometric chart)
      2. calculate BTU
   C. Air Handlers (coil to water)
      1. gpm (gallon per minute flow)
      2. difference in cw temperature (DT)
      3. calculate BTU
   D. CW (chilled Water)supply and return
      1. gpm (gallon per minute flow)
      2. difference in temperature (DT)
      3. calculate BTU
   E. Transfer through the vapor compression cycle (chiller)
      1. cw gpm (gallon per minute)flow
      2. difference in temperature (DT)
      3. calculate BTU
   F. Water condenser
      1. gpm (gallon per minute flow)
      2. difference in temperature (DT)
      3. calculate BTU
   G. Cooling tower (water side)
      1. gpm (gallon per minute flow)
      2. difference in temperature (DT)
      3. calculate BTU
   H. Cooling tower (air side)
      1. cfm (cubic ft. per minute)
      2. difference in enthalpy (using the psychrometric chart)
      3. calculate BTU
 
MCCCD Governing Board Approval Date:  6/28/2011

All information published is subject to change without notice. Every effort has been made to ensure the accuracy of information presented, but based on the dynamic nature of the curricular process, course and program information is subject to change in order to reflect the most current information available.