DIET 1040 Syllabus

Heating, Ventilation, and Air Conditioning (HVAC) Safety
Order       Description
   1            Comply with personal and environmental safety practices associated with clothing, eye protection,
                 hand protection, proper lifting practices, hand tools, power equipment, proper ventilation, and
                 the handling, storage, and disposal of fuels/chemicals/materials in accordance with federal, state,
                 and local regulations

 

HVAC System Theory and Operation
Order       Description
   1            Verify the need for service or repair of HVAC systems based on unusual operating noises;
                 determine needed action P-1
   2            Verify the need for service or repair of HVAC systems based on unusual visual, smell, and touch
                 conditions; determine needed action P-1
   3            Identify system type and components (cycling clutch orifice tube - CCOT, expansion valve, etc.)
                 and conduct performance tests to determine needed action P-1
   4            Retrieve diagnostic codes; determine needed action P-3

 

A/C System Component Diagnosis and Repair
Order       Description
   1            Identify causes of temperature control problems in the A/C system; determine needed action P-1
   2            Identify refrigerant and lubricant types and check for contamination; determine needed action P-1
   3            Identify A/C system problems indicated by pressure gauge and temperature readings; determine
                 needed action P-1
   4            Identify A/C system problems indicated by visual, audible, smell, and touch procedures;
                 determine needed action P-1
   5            Perform A/C system leak test: determine needed repairs P-1
   6            Perform evacuation, recovery, and recharge of A/C system using appropriate equipment P-1
   7            Identify contaminated A/C system components and hoses; determine needed action P-3
   8            Identify A/C system problems that cause protection devices (pressure, thermal, and electronic) to
                 interrupt system operation; determine needed action P-1
   9            Inspect, test, and replace A/C system pressure, thermal, and electronic protection devices P-2
  10           Inspect and replace A/C compressor drive belts, pulleys, and tensioners P-1
  11           Perform adjustment of A/C belt tension and check alignment P-1
  12           Inspect, test, service, or replace A/C compressor clutch components or assembly P-2
  13           Inspect and correct A/C compressor lubricant level
  14           Inspect, test, or replace A/C compressor P-2
  15           Inspect, repair, or replace A/C compressor mountings and hardware P-2
  16           Correct system lubricant level when replacing the evaporator, condenser, receiver/drier, or
                 accumulator drier, and hoses P-1
  17           Inspect A/C system hoses, lines, filters, fittings, and seals; determine needed action P-1
  18           Inspect A/C condenser for proper air flow P-1
  19           Inspect and test A/C system condenser and mountings; determine needed action P-2
  20           Inspect and replace receiver/drier or accumulator/drier P-1
  21           Inspect and test cab/sleeper refrigerant solenoid and expansion valve(s) P-3
  22           Check placement of thermal bulb (capillary tube) and determine needed action P-3
  23           Perform removal and replacement of orifice tube P-1
  24           Inspect and test cab/sleeper evaporator core; determine needed action P-3
  25           Inspect, clean, or repair evaporator housing and water drain P-1
  26           Inspect, service/replace evaporator air filter P-1
  27           Identify and inspect A/C system service ports (gauge connections); determine needed action P-1
  28           Identify the cause of system failures resulting in refrigerant loss from the A/C system high
                 pressure relief device; determine needed action P-2

 

HVAC System Diagnosis
Order       Description
   1            Identify causes of outlet air temperature control problems in the HVAC system; determine needed
                 action P-1
   2            Identify window fogging problems; determine needed action P-2
   3            Perform engine cooling system tests for leaks, protection level, contamination, coolant level,
                 coolant type, temperature, and conditioner concentration; determine needed action P-1
   4            Inspect engine cooling and heating system hoses, lines, and clamps; determine needed action P-1
   5            Inspect and test radiator, pressure cap, and coolant recovery system (surge tank); determine
                 needed action P-1
   6            Inspect water pump for leaks and bearing play; determine needed action P-2
   7            Inspect and test thermostats, by-passes, housings, and seals; determine needed repairs P-2
   8            Perform recovery, flushing, and refilling of cooling system with recommended coolant/additive
                 package and then bleed cooling system P-1
   9            Inspect thermostatic cooling fan system (hydraulic, pneumatic, and electronic) and fan shroud;
                 replace as needed P-2
  10           Inspect and test heating system coolant control valve(s) and manual shut-off valves; determine
                 needed action P-2
  11           Perform inspection and flushing of heater core; determine needed action P-3

 

HVAC Operating Systems and Related Controls
Order        Description
   1             Identify causes of HVAC electrical control system problems, determine needed action P-1
   2             Inspect and test HVAC blower motors, resistors, switches, relays, modules, wiring, and
                  protection devices; determine needed action P-2
   3             Inspect and test A/C compressor clutch relays, modules, wiring, sensors, switches, diodes, and
                  protection devices; determine needed action P-2
   4             Inspect and test A/C related electronic engine control systems; determine needed action P-2
   5             Inspect and test engine cooling/condenser fan motors, relays, modules, switches, sensors,
                  wiring, and protection devices; determine needed action P-3
   6             Inspect and test electric actuator motors, relays, modules, switches, sensors, wiring, and
                  protection devices, determine needed action P-3
   7             Inspect and test electrical/electronic control panel assemblies; determine needed action P-3
   8             Identify causes of HVAC air and mechanical control problems; determine needed action P-3
   9             Inspect and test HVAC system air and mechanical control panel assemblies; determine needed
                  action P-3
  10            Inspect, test, and adjust HVAC system air and mechanical control cables and linkages; determine
                  needed action P-3
  11            Inspect and test HVAC system actuators and hoses; determine needed action P-3
  12            Inspect, test, and adjust HVAC system ducts, doors, and outlets; determine needed action P-3