Selection data – York YCAL0041 User Manual
Page 11
YORK INTERNATIONAL
11
FORM 150.64-EG1
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.
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:
GPM = TR x 24
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)
6.
Ethylene Glycol Correction Factors – The fol-
lowing factors are to be applied to the standard
ratings for units cooling ethylene glycol.
7.
Propylene Glycol Correction Factors – The fol-
lowing factors are to be applied to the standard
ratings for units cooling propylene glycol.
Selection Data
FOULING FACTOR
ALTITUDE
TEMP
SPLIT
0.0001
0.00025
TONS
COMPR
kW
TONS
COMPR
kW
SEA LEVEL
8
0.990
0.998
0.979
0.996
10
1.000
1.000
0.991
0.998
12
1.012
1.003
1.002
1.001
14
1.021
1.005
1.012
1.003
2000 FT.
8
0.987
1.005
0.978
1.003
10
0.997
1.008
0.988
1.006
12
1.009
1.010
1.000
1.008
14
1.018
1.012
1.009
1.010
4000 FT.
8
0.983
1.014
0.975
1.012
10
0.994
1.016
0.985
1.014
12
1.005
1.019
1.111
1.017
14
1.014
1.021
1.006
1.019
6000 FT.
8
0.980
1.023
0.971
1.021
10
0.990
1.025
0.982
1.023
12
1.002
1.028
0.993
1.026
14
1.011
1.030
1.002
1.028
PROPYLENE GLYCOL
%
WEIGHT
TONS
COMPR
KW
GPM
°F/TON
PRESS
DROP
FREEZE
PT
10
0.995
0.999
24.0
1.014
26
20
0.984
0.997
24.3
1.104
19
30
0.973
0.994
24.9
1.234
9
40
0.960
0.992
25.6
1.399
-6
50
0.943
0.989
26.6
1.599
-28
ETHYLENE GLYCOL
%
WEIGHT
TONS
COMPR
KW
GPM
°F/TON
PRESS
DROP
FREEZE
PT
10
0.996
0.999
24.3
1.049
26.2
20
0.991
0.998
25.1
1.124
17.9
30
0.984
0.997
25.9
1.258
6.7
40
0.976
0.995
26.9
1.430
-8.1
50
0.968
0.994
28.0
1.650
-28.9