HVACR Maintenance

1
HVAC/R Maintenance

• An Explanation on Its Importance

2
Reasons for Having Maintenance Done on Your
HVAC/R System.

• Operating history of a system.
• Catching repairs when they are minor.
• Reducing the amount of major breakdowns.
• Keeping system efficiencies to the highest level
  possible.
• Overall, having the information needed to know
  when a system should be replaced.

3
Operating History of a System.

• Having an operating history of any HVAC/R system
  is necessary because as a system gets older, more
  parts will fail. If a part fails more than once,
  this information could help the service
  technician get a thorough understanding of a
  possible on-going problem and will assist them in
  making the correct repair. Normally this type of
  problem would arise on an older system or, a
  system that has not been installed properly.

4
Catching Repairs When They Are Minor.

• By having a regularly scheduled maintenance
  program in place, a system is inspected at least
  twice a year. This allows the technician to
  inspect the operation of the system under
  different conditions and check its performance.
  If the system has electrical problems, for
  example, pitted contacts on a compressor
  contactor, or a relay that is chattering or
  humming excessively. These replacement parts are
  very inexpensive as opposed to the cost of a
  compressor or fan motor.

5
Reducing the Amount of Major Breakdowns.

• By maintaining an HVAC system, it will reduce the
  amount of major breakdowns, however It will not
  eliminate them. Making repairs to a system when
  they are minor, will save large expenses in two
  ways.
• 1.The out of pocket expenses or capital
  outlay.
• 2. System down time.
• This is especially important in factories and
  office buildings where heating, ventilation and
  air conditioning is crucial to the businesss
  operation.

6
Keeping System Efficiencies to Their Highest
Possible Level.

• Although changing air filters regularly will keep
  the system air flow correct and clean, it alone
  isnt enough. A thorough inspection needs to be
  performed at least twice a year. An inspection
  should include
• Refrigerant pressure test.
• Amp draws on all motors and controls.
• Superheat test on the refrigerant circuits.

7
System Efficiencies Continued

• Evaporator washing (if needed).
• Condenser pressure washing at least once a
  year. (Generally in the spring).
• Electrical inspection of control wiring and motor
  wiring.
• Temperature control test to assure accuracy.
• Overall physical inspection of the system to
  assure there are no loose panels etc.

8
Having the Necessary Information

• When a good preventative maintenance plan is in
  place, you will have the information you need
  when the time comes to replace the system. This,
  more often than not, will avoid any unexpected
  cost, giving you time to budget for, and properly
  select the replacement system.
• Please note that ALL of the procedures in this
  presentation should be performed by a trained
  professional HVAC/R technician.