Selection Data; Design Parameters - York YCAL0065 User Manual

Selection Data

GUIDE TO SELECTION
Capacity ratings for YORK YCAL Packaged Air-Cooled
Liquid Chillers, shown on pages 16 through 39 cover
the majority of design applications for these units. For
unusual applications or uses beyond the scope of this
catalog, please consult your nearest YORK Office or
representative.
SELECTION RULES
1. Ratings – Ratings may be interpolated, but must
not be extrapolated. The Ratings given on pages 16
through 39 and the DESIGN PARAMETERS given
on page 11 indicate the limits of application for these
chillers.
2. Cooler Water – Ratings are based upon 2.4 GPM
per ton which is equal to a 10°F chilled water range
and a 0.0001 fouling factor for the cooler at sea level.
Tables on pages 16 through 39 give capacity, com-
pressor kW required, cooler GPM and unit EER.
3. Condenser – Ratings are given in terms of air on
condenser in degrees Fahrenheit.
4. Copper Fin Condenser Ratings – Since the ther-
mal conductivity of copper is slightly higher than
aluminum, apply the following corrections to the
standard ratings. Tons x 0.97 and compressor kW
x 0.99.
5. Performance Data Correction Factors – Ratings
are based on 0.0001 cooler fouling factor, 10°F
chilled water range and at sea level. For operation at
different conditions, apply the appropriate correction
factor from the following table.
FOULING FACTOR
TEMP
ALTITUDE
SPLIT TONS
8 0.990
10 1.000
SEA LEVEL
12 1.012
14 1.021
8 0.987
10 0.997
2000 FT.
12 1.009
14 1.018
8 0.983
10 0.994
4000 FT.
12 1.005
14 1.014
8 0.980
10 0.990
6000 FT.
12 1.002
14 1.011
YORK INTERNATIONAL
0.0001 0.00025
COMPR COMPR
TONS
kW kW
0.998 0.979 0.996
1.000 0.991 0.998
1.003 1.002 1.001
1.005 1.012 1.003
1.005 0.978 1.003
1.008 0.988 1.006
1.010 1.000 1.008
1.012 1.009 1.010
1.014 0.975 1.012
1.016 0.985 1.014
1.019 1.111 1.017
1.021 1.006 1.019
1.023 0.971 1.021
1.025 0.982 1.023
1.028 0.993 1.026
1.030 1.002 1.028
6. Ethylene Glycol Correction Factors – The fol-
lowing factors are to be applied to the standard
ratings for units cooling ethylene glycol.
ETHYLENE GLYCOL
% COMPR
TONS
WEIGHT KW
10 0.996 0.999
20 0.991 0.998
30 0.984 0.997
40 0.976 0.995
50 0.968 0.994
7. Propylene Glycol Correction Factors – The fol-
lowing factors are to be applied to the standard
ratings for units cooling propylene glycol.
PROPYLENE GLYCOL
% COMPR
TONS
WEIGHT KW
10 0.995 0.999
20 0.984 0.997
30 0.973 0.994
40 0.960 0.992
50 0.943 0.989
METHOD OF SELECTION
To select of YORK Packaged Air-Cooled Liquid 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 following
formula:
TR x 24
GPM =
RANGE (°F)
EXAMPLE – WATER CHILLING
1. Given: Provide a capacity of 50 tons at 42 F leav-
ing water at 10 F range. 0.0001FF, 85 F air on the
condenser, at sea level and 60 Hz.
2. Find: Unit Size, Compressor KW Output
3. From the ratings on page 18.
Select: YCAL0061 (English Units)
FORM 150.64-EG1
GPM PRESS FREEZE
°F/TON DROP PT
24.3 1.049 26.2
25.1 1.124 17.9
25.9 1.258 6.7
26.9 1.430 -8.1
28.0 1.650 -28.9
GPM PRESS FREEZE
°F/TON DROP PT
24.0 1.014 26
24.3 1.104 19
24.9 1.234 9
25.6 1.399 -6
26.6 1.599 -28
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