Transcription of PERFORMANCE SELECTION DATA | Hot Water Heating …
1 Non Fan Powered UnitsPERFORMANCE SELECTION data | Hot Water Heating AVW andABWS elect a one or two row coil for the desired GPM andMBH requirements from the graphs for the unit sizeand the CFM data is based on 125 (51 C) temperature dif-ference between entering air and entering represents the typical input conditions of 55 (13 C) entering air (EAT) and 180 (82 C) enteringwater (EWT).Below are listed temperature difference factors for installations that have a different entering air temperature (EAT) and/or different entering watertemperature (EWT) from the cataloged the MBH obtained from the tables on the following pages by the temperature difference factorto obtain the MBH for actual formula for the temperature difference factor is.
2 Temperature DifferenceEWT - EATF actor (TDF)=125 The formula to calculate actual MBH from tables actual= TDF x MBHfrom tablesTemperature(TDF)Temperature(TDF)Di fferenceFactorDifferenceFactor80 F (27 C) F (54 C) F (32 C) F (60 C) F (38 C) F (66 C) F (43 C) F (71 C) F (49 C) F (77 C) the following formulas to convert temperature rise to MBH or vise verse:MBH x 1,000 Air Temperature Rise =CFM x MBH Water Temperature Drop = .5 x GPMCFM x x Air Temp. RiseMBH =1,000 MBH = GPM x .5 x Water Temp. Drop GPM = Gallons Per MinuteMBH = 1000 Btu/h (British Thermal Units/Hour)EWT = Entering Water Temperature FEAT =Entering Air Temperature FOptimum Water flow for hot Water coils is 3 to 6 feet per second (fps)For the Carnes 1/2 (13mm) O.
3 D. Tubes:Circuits x Flow (fps)GPM optimum= :1. data is based on 180 F (82 C) EWT and 55 F (13 C) GPM above or below catalog values not Standard coils are not recommended for steam Coil is shipped attached to the terminal unit and is Coil connections may be ordered as right hand or left hand, determined by facing the averaging flow sensor (inlet of unit ) with the supply air hitting the back of your head. Hand of coil may be field reversed. PERFORMANCE SELECTION data | Hot Water Heating CoilsNon Fan Powered data - AVW 05 8 x 12 CoilCOIL data - AVW 06 8 x 12 CoilGPM above or below catalog values not recommendedData Based on 180 F EWT and 55 F EATCFM1-Row (1 Circuit)2-Row (1 Circuit) (1 Circuit)2-Row (1 Circuit) Fan Powered UnitsPERFORMANCE SELECTION data | Hot Water Heating data - AVW, ABW 06, 07 10 x 12 CoilCOIL data - AVW, ABW 08 10 x 12 CoilCOIL data - AVW, ABW 10 12-1/2 x 14 CoilCOIL data - AVW, ABW 12 15 x 16 CoilGPM above or below catalog values not recommendedData Based on 180 F EWT and 55 F EATCFM1-Row (1 Circuit)
4 2-Row (2 Circuit) (1 Circuit)2-Row (2 Circuit) (1 Circuit)2-Row (2 Circuit) (2 Circuit)2-Row (3 Circuit) SELECTION data | Hot Water Heating CoilsNon Fan Powered data - AVW, ABW 14 17-1/2 x 20 CoilCOIL data - AVW, ABW 16 18 x 24 CoilCOIL data - AVW 18, ABW 18 17-1/2 x 32 CoilCOIL data - AVW 24, ABW 24 17-1/2 x 32 CoilGPM above or below catalog values not recommendedData Based on 180 F EWT and 55 F EATCFM1-Row (2 Circuit)2-Row (3 Circuit) (2 Circuit)2-Row (3 Circuit) (2 Circuit)2-Row (3 Circuit) (2 Circuit)2-Row (3 Circuit)
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