Model YLAA Air-Cooled Scroll Chillers Style A - Johnson Controls

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Selection Criteria and ProceduresGUIDE TO SELECTIONCapacity ratings for YORK YLAA Packaged Air-CooledLiquid Chillers, shown on pages 18 through 23 cover themajority of design applications for these units. For unusualapplications or uses beyond the scope of this catalog,please consult your nearest Johnson Controls Office orrepresentative.SELECTION RULES1. Ratings – Ratings may be interpolated, but must notbe extrapolated. The Ratings given on pages 18 through23 and the DESIGN PARAMETERS given on page 10indicate the limits of application for these chillers.2. Evaporator Water – Ratings are based upon 2.4 GPMper ton which is equal to a 10°F chilled water range anda 0.0001 fouling factor for the evaporator at sea level.Tables on pages 18 through 23 give capacity, compressorkW required, evaporator GPM and unit EER.3. Condenser – Ratings are given in terms of air on condenserin degrees Fahrenheit.4. Performance Data Correction Factors – Ratings arebased on 0.0001 evaporator fouling factor, 10°F chilledwater range and at sea level. For operation at differentconditions, apply the appropriate correction factor fromthe following table.FOULING FACTORALTITUDESEA LEVEL2000 FT.4000 FT.6000 FT.TEMPSPLITTONS0.0001 0.00025COMPRkWTONSCOMPRkW8 0.994 0.999 0.991 0.99810 1.000 1.000 0.993 0.99912 1.005 1.001 0.999 0.99914 1.008 1.002 1.005 1.0008 0.990 1.010 0.984 1.00910 0.995 1.010 0.990 1.00912 0.999 1.011 0.995 1.01014 1.004 1.015 0.998 1.0118 0.983 1.021 0.977 1.02010 0.989 1.024 0.983 1.02112 0.994 1.025 0.988 1.02414 0.997 1.026 0.993 1.0258 0.978 1.035 0.973 1.03410 0.982 1.037 0.978 1.03512 0.987 1.037 0.980 1.03614 0.992 1.038 0.986 1.0376. Ethylene Glycol Correction Factors – The followingfactors are to be applied to the standard ratings for unitscooling ethylene glycol.ETHYLENE GLYCOL%WEIGHTTONSGPM°F/ PRESSCOMPRkW TON DROP10 0.985 0.997 24.1 1.034 2620 0.981 0.996 24.9 1.062 1630 0.974 0.995 26.1 1.096 540 0.966 0.991 27.5 1.134 -10FREEZEPT50 0.957 0.989 29.1 1.172 -327. Propylene Glycol Correction Factors – The followingfactors are to be applied to the standard ratings for unitscooling propylene glycol.PROPYLENE GLYCOL%WEIGHTTONSkWCOMPRGPM°F/TONPRESSDROPFREEZEPT10 0.983 0.996 24.2 1.048 2720 0.974 0.995 24.4 1.086 1930 0.961 0.990 25.1 1.134 840 0.946 0.98 26.0 1.186 -550 0.928 0.984 27.2 1.247 -25METHOD OF SELECTIONTo select a Johnson Controls - YLAA Packaged Air-CooledLiquid Chiller, the following data must be known:1. Design Capacity in tons refrigeration (TR).2. Entering and Leaving Liquid Temperatures.3. Outside ambient air temperature in degrees F.4. GPM of chilled liquid.Determine capacity requirements from the followingformula:EXAMPLE – WATER CHILLING1. GIVEN: Provide a capacity of 90 Tons at 42°Fleaving water 10°F range, 0.0001FF, 80°F air onthe condenser, at sea level and 60 Hz.2. FIND: Unit Size Compressor kW Input3. From the Ratings on pages 18 - 23:SELECT: YLAA0090SE (English Units)91.4 Tons82 Compressor KW12.4 Unit EER4. Calculate Compressor kW at 50 Tons:kW = (90-91.4) x 80.7 = 80.7 kW12 jOHNSON CONTROLS
FORM 150.62-eg3 (1108)5. Calculate GPM:90 Tons x 24GPM = 216 GPM10°F Range6. From Page 10, read 10 ft of water evaporatorpressure drop for GPM:7. A YLAA0090 is suitable.EXAMPLE – Brine Chilling1. GIVEN: Provide a capacity of 80 tons cooling30% by weight Ethylene Glycol from 50°F to 40°F,0.00025FF, 95°F air on the condenser, 60 Hz and4000 altitude.2. DETERMINE:Unit Size kW InputEthylene Glycol GPM Evaporator PressureDrop3. See Ethylene Glycol correction factors, for 30%by weight Ethylene Glycol.READ: .974 Tons factor.995 Compr. kW factor 26.1 Gal./°F/Tons factor4. See Performance Data Correction Factors for0.00025 fouling factor and 4000 ft. altitude.READ: .983 Tons factor 1.021 kW factor5. From RATINGS on pages 18 - 23:SELECT: YLAA0090 (English Units)91.4 Tons 82.0 Compressor kW6. Determine YLAA0090 brine cooling capacityand Compressor kW requirement:A. Tons = 91.4 x .974 x .983 = 87.51B. Compr. kW = 82.0 x .995 x 1.021 = 83.3Determine average full load Compressor kW at80 tons: (80/87.51) x 83.3 = 76.15kW8. Determine Ethylene Glycol GPM:Tons x Gal. °F/min/Ton factorGPM = Range 80.0 x 26.1GPM = 10 GPM = 208.89. Determine Evaporator Pressure Drop:A. See Ethylene Glycol correction factors for30% by weight Ethylene Glycol.READ: 1.096 Pressure Drop FactorB. See pages 18-19 at 88.7 GPM for theYLAA0090. READ: 6.8 Ft. H2O PressureDropC. Evaporator Pressure Drop = 6.8 x 1.096 or7.5 Ft. H2O10. YLAA0090 is suitable.jOHNSON CONTROLS13
Page 1 and 2: Form 150.62-EG3 (1108)Model YLAA Ai
Page 3: IntroductionFORM 150.62-eg3 (1108)T
Page 7 and 8: Accessories and OptionsFORM 150.62-
Page 9: FORM 150.62-eg3 (1108)FAN DECKPOWER
Page 14 and 15: Pump Selection CriteriaPump Selecti
Page 16 and 17: Pump Pressure Drop CurvesYLAA007050
Page 18 and 19: Single Pump CurvesKit A & FKit EKit
Page 20 and 21: Ratings - 60 HzMODEL: YLAA0070SE IP
Page 22 and 23: Ratings - 60 Hz - continuedMODEL: Y
Page 28 and 29: Part Load Ratings - Standard Effici
Page 30 and 31: Physical Data - EnglishModel Number
Page 32 and 33: Dimensions - Four Fan UnitsLFHPDWC1
Page 34 and 35: Dimensions - Six Fan UnitsLFHPDWC1C
Page 36 and 37: Dimensions - Ten Fan Units5/8" DIA.
Page 38 and 39: Isolator Locations - continuedBI, I
Page 40 and 41: Isolator DetailsONE INCH DEFLECTION
Page 42 and 43: Isolator Details - continuedELASTOM
Page 44 and 45: Electrical NotesNOTES:1. Minimum Ci
Page 46 and 47: Electrical Data w/o PumpsCHILLERMOD
Page 48 and 49: Electrical Data w/o Pumps - continu
Page 50 and 51: Wiring LugsCHILLER MODEL VOLT HZYLA
Page 52 and 53: Electrical Data w/ PumpsCHILLERMODE
Page 54 and 55: Electrical Data w/ Pumps - continue
Page 60 and 61: CHILLERMODELVOLTHZPumpModelPumpMINI
Page 62 and 63:
Wiring Diagram62 jOHNSON CONTROLS
Page 64 and 65:
1.6/1.3/1.21L1NB1 NB11L1 /3.1 /4.2
Page 66 and 67:
66 jOHNSON CONTROLS=1-MF1=1-MF2=1-M
Page 68 and 69:
NB22L1 2L2 2L32L32L1 2L2 2L1 2L2 2L
Page 70 and 71:
=0+PUMP=0+INT-QMMSP11 1-QMMSP2=0+IN
Page 72 and 73:
72 jOHNSON CONTROLSNB6NB6-XTBC2-XTB
Page 74 and 75:
Notes - continuedGENERALa. THIS DRA
Page 76 and 77:
Guide SpecificationsPART 1 - GENERA
Page 78 and 79:
Guide Specifications - continuedlim
Page 80:
Guide Specifications - continuedwit
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Model YLAA Air-Cooled Scroll Chillers Style A - Johnson Controls

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