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Standard DX / Direct Expansion Evaporator Coils Quote Request Form
Intertwined DX / Direct Expansion Evaporator Coils Quote Request Form
Standard DX / Direct Expansion Evaporator Coil Circuiting and Construction Options
Our evaporator coils are designed and engineered for efficient operation with either Refrigerant 22, R407C, R410A or 134a. The performance capabilities are excellent for comfort cooling, process refrigeration, and moisture control dehumidifying. Direct expansion type evaporator coils are engineered and designed to deliver the maximum possible heat transfer efficiency under all operating conditions. The wide variety of circuiting available offers the opportunity to provide the best circuit for peak coil performance. All evaporator coils are counterflow circuited and equipped with pressure type distributors and all refrigerant distributor tubes are of equal length to provide equal distribution of refrigerant to each circuit. Capacity Reduction Applications To achieve energy economy, compressors with capacity reduction capability have become an industry standard. Balancing the evaporator coil capacity to the compressor capacity requires the use of face, row or interlaced control coils. To achieve face control, two coils are mounted one above the other and piped to separate refrigerant circuits. A single coil can also be provided with two distributors and two sets of suction connections in a face split configuration. Row control is achieved by placing one coil in front of the other or by installing a single coil with two separate refrigerant circuits. The first few rows of coil are circuited together and provided with distributor and suction connections. The balance of the coil rows are provided with a second set of distributor and suction connections. Interlaced control offers the optimum in capacity reduction. Interlaced coils provide higher part load capability than face or row control coils. The unique interlaced circuiting allows the entire face and depth of the coil to be active under part load conditions. Interlaced coils offer higher part load capacity because when only one circuit is active heat transfer is enhanced by additional fin surface that would normally be associated with the other refrigerant circuit. Many standard evaporator coils with normal circuiting are furnished with two distributors and two sets of suction connections for capacity reduction face control. Coils used for row control cannot always be circuited for the reduction capacities desired because of physical limitations. For this reason, row control capacity reduction is offered as standard for 6-row coils only. Six-row coils are split 2 rows and 4 rows which offers approximately 50% reduction per split. Interlaced control coils are offered in two configurations, coils are either provided with two distributors and two sets of suction connections or offer a combination interlaced/face split capacity reduction capability. Four separate refrigerant circuits are provided, each with an individual set of distributor and suction connections
Our DX Cooling Coils are made to ARI 410 Standards. Certification Acceptable coils are to have ARI Standard 410 certification and bear the ARI symbol. Non-certified coils or coils outside ARI's rating range will be considered if the manufacturer is a current member of the ARI air-cooling and air-heating coils certification program and the coils have been rated in accordance with ARI Standard 410.