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General Maintenance Guide
Your trained Central City Air technician should inspect your heating/cooling equipment at least yearly. Central City Air's Preferred Customer Programs provides reminders twice a year for service that will keep your equipment operating at peak efficiency year after year.
Outdoor Equipment
Outdoor Cooling Unit
- Check that grass, leaves, dirt etc. do not obstruct the out door coil. The coil fins may be cleaned by flushing with a water hose. Be sure to shut off power to unit before flushing to avoid electrical shock hazard. Do not flatten or bend coil fins, as this will harm unit efficiency.
- The fan motor in the outdoor unit may be oiled with a few drops of SAE no. 10 non-detergent oil every 1-2 years. This should result in longer bearing life. If the motor has no provisions for oiling, the bearings are permanently lubricated and sealed.
- You may choose to have your Central City Air technician perform this function as required, as some unit disassembly is required to reach fan motor oiling ports.
- The outdoor unit should be set with proper slope and graded so there is no buildup of water around unit. If there is a water drainage problem, call your dealer. Do not attempt to move the unit yourself as this may damage the unit's piping connections, resulting in refrigerant leaks and an inoperative system.
- Your condensing unit cabinet has been designed for minimum care. An occasional coat of wax will help to prevent deterioration of the finish and enhance its durability.
Indoor Equipment
Indoor Cooling Coil
Condensation takes place on the indoor cooling coil and is piped to a suitable drain. Check the condensate drain for free and running condition. If water does not run freely, the drainpipe must be cleaned. Some coils are equipped with an auxiliary drain (secondary drain). This drain is usually piped to an outside location where it can be observed. The auxiliary drain is a safety device to prevent overflow of condensate into the house. If water runs from the auxiliary drain, it indicates that the main condensate drain is clogged. Immediate steps should then be taken to service the main drain. Your Central City Air serviceman is properly trained to remedy this problem, and should be consulted in the event of this poor drainage condition.
Filters
Air filters should be checked monthly. A dirty filter should be replaced or cleaned immediately as it will cause your equipment to work a great deal harder than necessary, resulting in much energy waste and possible internal damage.
CAUTION: Shut power off to unit before removing access panel to change filter. Wait for blower to stop.
Pleated Filters HIGH-EFFICIENCY MEDIA FILTER Media filters trap contaminants without excessive restriction of airflow. Their radial pleating and multi-directional fiber design remove contaminating airborne particles as small as one micron (1/25,000 of an inch) in diameter.
Dust mites live in upholstered furniture, carpets, and mattresses. They feed on shed human and animal skin scale. In order to stay hydrated, dust mites must absorb their moisture needs from the air. If the relative humidity is below 50 percent, dust mites desiccate (dry out). Their appetites increase as the relative humidity climbs. This is significant because their fecal material is the source of the dominant dust mite allergen. Ninety percent of the population that experience any allergy-based sensitivities react to the dust mite allergen.
Once produced, the allergens settle into fabrics and carpet. The dust mite allergen remains potent for approximately 9 months. Individuals come into contact with the allergen after some activity like vacuuming, dusting, or making beds has "stirred-up" the area and caused the allergen to become airborne. Due to its size and shape, the allergen remains airborne for only a short period of time. For this reason, air duct cleaning and air filtration devices are ineffective methods of combating the dust mite allergen.
Blower Assembly
Blower motors used in Lennox and Amana equipment may be oiled with a few drops of SAE No. 10 non-detergent oil every 1-2 years. This will result in longer bearing life. Other considerations to follow apply to belt drive blower assemblies.
CAUTION: Shut power off to unit before removing blower access panel. Wait for blower to stop.
Direct drive blowers - It may be necessary to remove the complete blower assembly for access to oiling ports. This procedure is not recommended for most equipment owners, as special tools and some mechanical ability are necessary. It may be better to have your Central City Air technician perform this function as required.