The team here at M&A HVAC Services, LLC want to take this opportunity to explain the importance of matching coils, but will first help educate you on the functions of an evaporator coil and your system condenser coil. Not sure about current practice, but in the past, manufacturers would specify a 1/2 ton larger evap coil than the condenser & gain some SEER rating. With that said, about 30-40 years ago Carrier made their air handlers with all aluminum evaporator coils. Get to Know the Evaporator Coil. In the AC system, the heat extraction done by the evaporator coil: As the warm air gets blown into the evaporator coil by the blower fan, the heat starts moving through the cool coils and gets absorbed by the refrigerant. However, realistically, often you can use say a Trane indoor and a Rheem outdoor without problems as long as it is not a heat pump and they are the same ton (Ex. 1.2 FACTORY TESTING REQUIREMENTS . The weaker the coils, the more prone they are to developing refrigerant leaks. Try cleaning coils and a light weight filter, then recheck pressures. You need to assess the air flow, are the filter or coil dirty, or is the ducting blocked, fan speed set up correctly. Follow edited Aug 4 '20 at 9:55. answered Nov 29 '15 at 20:29. When your evaporator and condenser coils are mismatched in size, the smaller sized coils won’t be able to keep up with the capacity of the larger sized coils, which forces the entire system to run longer. When the thermostat indicates the ambient temperature is hotter than desired, the evaporator coil works like a car's radiator to cool air that then circulates through the ducts. Changing coil size is a trade off in that if you remove more latent heat, you remove less sensible heat (measurable temperature). Certain evaporator coil cleaners can also corrode and weaken the outer lining of the coils. Most condenser and evaporator coils are made of copper tubing, which works through a series of thin, aluminum strips known as fins. Please note that in order for this coil to function, a furnace or blower and a condenser is required, all sold separately. With its ability to be installed with either an AC-only condenser or a heat pump condenser, this unit is ideal for many applications. Unit not providing ventilation. 10.2k 2 2 gold badges 20 20 silver badges 48 48 bronze badges $\endgroup$ add a comment | 8 $\begingroup$ Soxhlet condenser. Higher than normal pressures indicate the refrigerant is not transferring its heat into the air passing through evaporator coil. Depending on how much bigger your condenser and what type of metering device choose you may get flooding on startup as well during run cycle. Unit not providing ventilation. As air passes over the evaporator coil (pictured above), the copper refrigerant-filled coils absorb heat and moisture. dx coil matching If the condenser coil is match larger then the evaporator coil you would have more latent capacity and less sensible capacity.That is if the airflow across the evaporator coil is the same. Karl Karl. My gas heat / air-handler is a Trane 17.5" wide unit and will remain. What was the sweat line on the coil I have a hard time believing that a 3 ton condensing unit can hold enough liquid in its condenser to prevent a 5 ton coil from being starved. AC Condenser. When evaporator and condenser coils do not match in size, the coils that are actually smaller in size are unable to keep up with the functionality of the larger sized coils. The evaporator coils also work in conjunction with the condenser unit to condense the water in the air, thereby reducing the humidity. Share. When the constant conductance model is used a conductance is determined for each zone of both the evaporator and the condenser. Your condenser coils sit directly behind the condenser “fins”—the thin metal wiring that covers your outdoor AC unit (see the picture above). Using an evaporator coil that is smaller than the condenser coil might work better in terms of dehumidification. 2.5 ton).Back in the 1970s it was popular to install a 1/2 ton larger indoor coil than the outdoor (say a 2.5 ton outdoor and a 3 ton indoor) The first distilling plants that boiled a separate water supply from that of the main boiler, appeared around 1867. Call us at 919-480-2727 or contact us online to schedule your appointment now! The air conditioner as illustrated utilizes a condenser fan 27 that draws air through screen 28 past the condenser coil 13, although condenser fans which blow air through the condenser coil are common also. Coils shall be designed to withstand 250 psi maximum operating pressures and a maximum temperature of 300°F for standard duty copper tube coils with standard headers. The water yield due to air dehumidification on finned evaporator coils was calculated using a developed model that relates the surface efficiency to the enthalpy change of cooled moist air. 5. The detrimental part is that it will be ineffective in terms of removing moisture from the air. Little agreement suggests people don't know what they're talking about. This is intentional, to maintain the overall efficiency of the entire system. Evaporator coils commonly fail sooner than almost any other component of a home HVAC system. The Goodman CAUF3642C6 uncased evaporator coil is designed to have a 3 to 3.5 ton output when installed with a condenser and a blower or furnace. I want to replace my A/C condenser and evaporator with a set of new Goodman matched units. Remain retracted until they will be the care for larger than coming to prevent scratching the online or bringing nature of the ocean. While many will argue the reasoning for failure, most agree that if you don’t properly clean and maintain your system every year, it will eventually result in a buildup of dust, soot and other airborne particles that will block air flow and lead to failure. Oil logged in the evaporator will coat the inner wall of the coil and reduce the heat transfer through the walls, which will cause a loss of capacity and poor performance. The ADP M36E321 evaporator coil is rated to be compatible with condensers with up to 3 tons of heating and cooling. R eplacement is a better economic value if the air conditioning system is more than 10 years old, if other problems are discovered, or if the unit operates on R-22 (Freon). An AC condenser unit connects to the evaporator coil. 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