AC Maintenance

Preventive Maintenance

Preventive maintenance really does protect your wallet! I would encourage you to learn why preventive maintenance for heating and air conditioning systems is so critical. By knowing about preventive maintenance you will make better, more informed decisions and protect your wallet.

Preventive maintenance has a total effect of keeping your system running efficiently and extend it’s useful lifespan. In our preventive maintenance section learn what must be done and why. Proper maintenance reduces repair costs, reduces energy consumption, maximizes equipment lifespan and maintains your comfort. For a very good and completely accurate information on preventive maintenance.

When dealing with Air Conditioning in Florida, the old adage ‘If it ain’t broke, don’t fix it does not apply!’ Maintenance is the key to delivering consistent and reliable cooling and heating systems. At Daily A/C, we urge our customers to enroll in our Energy Savings Club, which is designed to ensure consistent performance. For a mere twelve dollars each month, club members receive:

  • Priority Service – Yes, we have HVAC technicians on call for everyone 24 hours a day, 365 days a year. During our busy seasons (for example, the hot Florida summer) Energy Savings club members receive the quickest response.
  • Discount Savings – Purchase a new Air Conditioning unit, and receive 5% off. Repairs and indoor air quality purchases are 10% off.
  • Semi-annual A/C Tune-ups – We go down a 16 point checklist that includes checking and fine-tuning the following:
  1. Refrigerant pressures – We will add up to 2 lbs at no additional charge
  2. Condenser
  3. Oil outdoor fan motor
  4. Thermostat and system operation
  5. Compressor amp draw
  6. Outdoor fan motor amp draw
  7. Indoor motor amp draw
  8. Oil indoor fan motor
  9. Blower wheel
  10. Drain pan and clean drain line
  11. 11. Drain pan safety switch
  12. Air handler
  13. Ductwork for contamination and leaks
  14. Surface clean indoor coil in place if possible (if impacted – quote separately
  15. Electrical wiring indoor & outdoor units
  16. Safety controls

Contact Daily A/C, Inc. for expert maintenance of your Air Conditioning unit.

Preventive maintenance for heating and air conditioning.

Why is service / Preventive maintenance so necessary for heating and air conditioning equipment?

Quality GuaranteePreventive maintenance or service is essential to the proper functioning of air conditioning and heating equipment. If preventive maintenance is not performed regularly or if it is done haphazardly, the equipment will require extensive and costly repairs at a later date that is sooner than it should be. This is not just a case of “pay me now or pay me later.” It is a case of “pay me now or pay me considerably more, later,” and lose reliability while paying higher repair and energy costs in the process.

Preventive maintenance programs for air conditioning and heating equipment include regular inspections each year. During these inspections, proper operation of the equipment is checked and verified. All mechanical equipment is designed to operate within certain limits.

Air conditioning and heating equipment is no exception, and if not properly maintained, the equipment will exceed its design limitations with the result being equipment failure. Your best insurance against HVAC failure and cost containment is equipment preventive maintenance. Preventive maintenance checklist & hvac preventive maintenance.

Why must we service & replace air conditioning filters?

Quality GuaranteeAir conditioning equipment is designed to operate with a specific quantity of air passing over its indoor coil surface. When air filters are not replaced, they clog and become coated with dirt. Similarly, the indoor coils get coated with dirt. This dirt reduces the amount of air through the unit below the design limit, leading to catastrophic failure.

In the cooling mode, if there is not enough air over the indoor coil, the coil temperature drops. When it drops below the freezing point, ice forms on the coil, which further reduces the airflow, which further reduces the coil temperature. The compressor within the unit is a pump, which is designed to pump a vapor. As the airflow through the indoor coil drops, there isn’t enough heat being removed from the air passing over the coil to vaporize the liquid refrigerant inside the coil. Thus, instead of receiving a vapor, the compressor receives liquid refrigerant. This is called “liquid slugging”. The effect of “liquid slugging” is similar to the effect of pouring liquid into the cylinders of a gas engine. As liquids are not compressible, cylinder pressure exceeds the design limits, of the cylinder, and the valves, connecting rods, pistons, or other internal components are destroyed. The air conditioning unit starts out requiring that its filters be replaced. Now it needs a new compressor. Preventive maintenance or a new compressor?

Ultimately, it’s your choice. In the heating mode, low airflow causes the heat exchanger to overheat. Heat exchangers are designed to operate at temperature between 120°F and 200°F. At higher temperatures, the heat exchanger oxidizes, its life-span is reduced, or it cracks and breaks. In either case, It makes far more sense to replace air filters regularly than to replace a heat exchanger costing far more.

Why must we replace drive belts? ( usually commercial )

Loose or broken drive belts cause the same problems that dirty filters cause. cause the airflow through the equipment to be reduced below design limits. In addition, loose drive belts slip on the pulleys. This wears the groove in the pulley so that when the belt is replaced, the new belt is ruined in a shorter period of time by the worn pulleys. Once again during preventive maintenance we must replace the $25.00 belt on a regular basis or spend much more replacing pulleys.

Why must we clean condenser coils?

Air conditioning equipment is designed to operate between certain outdoor temperature limits. Cooling and condensing of the refrigerant vapour is designed to occur with a particular volume of air flowing through the condenser at a maximum outdoor ambient temperature. (Usually 115°F)

If the finned surfaces of the outdoor coils are fouled with dirt, the ability of these coils to transfer heat is reduced and the airflow through the condenser coil is reduced (blocked by dirt and dust). When the ability to transfer heat is reduced, the operating temperatures and pressures of the air conditioning unit increase. A unit, designed to operate at ambient temperatures of 115°F or more, may stop operating at an outdoor temperature of 90°F. Due to the reduced heat transfer capability, the operating temperatures and pressures within the unit exceed the manufacturer’s safe limit and the unit shuts down.

If the unit does not exceed the manufacturer’s limits by enough to shut down, it will continue to run at reduced capacity and efficiency, and at an increased rate of wear and energy consumption due to the increased work load. A strong reason for preventive maintenance, reducing wear, costs and catastrophic failure.

Why inspect air conditioner relays and contactors?

Electrical relays are designed to open and close a certain number of times with a particular current load, before the contact points are damaged and relay requires replacement. If more than the design current is passed through this relay due to a motor working too hard, or low voltage conditions, the contact points overheat and become damaged. If the electrical contacts in a contactor (large relay) begin to get pitted, and the contactor is not replaced, eventually the air conditioners compressor motor or the fan motor controlled by the contactor will burn up and require replacement. Once again, if we exceed the design limitations of the device, or its anticipated life span, additional damage is caused. Cheap to replace a relay or contactor during a preventive maintenance when compared with a motor or compressor replacement.

Why lubricate bearings and rotating components?

Bearings and other rotating parts are designed to have a useful life span of hundreds of thousands of hours, provided they are lubricated at appropriate intervals and are not overloaded due to vibration from defective drive belts or dirty blower wheels. If bearings are not lubricated regularly, they will overheat and eventually seize. When this occurs, the bearings fall apart, and the blower wheel, shaft, and housing are destroyed. This is a prime example of a situation where inexpensive preventive maintenance was neglected with catastrophic results.

Why check the AC refrigerant charge on a regular basis?

A unit operating with an insufficient refrigerant charge can ruin its compressor via two scenarios. The unit icing up due to a low-pressure condition causes the compressor to fail due to liquid slugging, as described before. The second type of failure is due to the fact that the compressor requires a certain quantity of cool refrigerant vapour to cool its motor windings. If the refrigerant charge is not sufficient, the motor within the compressor will overheat and burn up. A preventive maintenance program would spot this condition and save you money.

Conclusions

The scenarios described all cause damage to occur slowly over time, usually without being noticed until catastrophic failure has occurred. Regularly scheduled service / preventive maintenance on any HVAC or heating and air conditioning system lowers overall air conditioning and heating service costs. It reduces emergency calls due to catastrophic failures, it results in lower energy costs and lower replacement costs. It reduces repair costs.

HVAC RULE: properly maintained air conditioning and heating equipment operates more efficiently, consumes less energy and lasts longer.

Daily A/C offers customized preventive maintenance programs designed to suit your specific needs.Over the years we have noticed that customers who are well informed and have a basic understanding about Heating and air conditioning make better decisions and quite frankly are far less likely to be talked into a mistake or be mislead by bad HVAC contractors. Over the years they spend thousands of dollars less on energy, repair and capital costs.