MCCCD Official Course Competencies:

HVA210LL  2003 Fall – 2011 Fall

Facilities Air Conditioning Systems Lab

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 Outline:

HVA210LL  2003 Fall – 2011 Fall

Facilities Air Conditioning Systems Lab

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 tota.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