Direct Expansion Fan Coil Unit

The popularity of this system is because the installation work has been made easier hence reducing the cost of the overall system.

Direct expansion fan coil unit. The unit cools air by passing the condensed refrigerant through a heat exchanger inside the building to be cooled. Direct expansion coils include matched factory installed thermostatic expansion valves txvs with matching distributor nozzles. A division of mestek inc since 2000 airtherm offers a full line of fan coils as well as hydronic heating products all proudly made in the usa. Why airtherm all airtherm products are engineered with quality in mind.

It is the type of air conditioning unit most commonly used in homes in the united states. The direct expansion system in hvac has been growing rapidly due to its ability to get rid of most duct work and piping. In the direct expansion or dx types of air central conditioning plants the air used for cooling space is directly chilled by the refrigerant in the cooling coil of the air handling unit. On off control of the cold liquid to each room is effected by a solenoid valve within each indoor unit controlled by a room thermostat.

A direct expansion air conditioning unit also called a dx unit cools indoor air using a condensed refrigerant liquid. Direct expansion dx coils are designed for use with puron r 410a refrigerant and have copper tubes mechanically bonded to aluminum sine wave fins. The carrier 40lau horizontal type direct expansion fan coil units come in 6 sizes covering air flowrate range between 1 600 to 5 000 cfm. With everything from belt drive to ducted units and unique stackable configurations all in multiple models and capacities airstream units offer exceptional flexibility and availability.

No other selection of fan coils is more complete than carrier s airstream product line. The units are pre wired pre charged with puron r 410a refrigerant and 42tpm direct expansion fan coil units are available in 7 sizes with nominal cooling capacity range from 1 5 to 5 0 tons. Liquid from the condenser passes directly through an expansion device and the resulting mixture of cold liquid and flash gas is distributed to each of the fan coil units on the circuit. The dx system works in such a way that the evaporator is located in the space to be refrigerated.

Each unit is designed to occupy a minimum space. However it is not always feasible to carry the refrigerant piping to the large distances hence direct expansion or the dx type of central air conditioning system is usually used for cooling the small. Direct drive fan coil units from design build to large project retrofit usa coil air has almost every type and size covered when it comes to direct drive fan coil units. Piping drain and wiring connections are readily accessible integral mounting brackets are included to save installation time.

Since the air is cooled directly by the refrigerant the cooling efficiency of the dx plants is higher.