York YCAL Series, Руководство пользователя, Страница: 13 / 104

FORM 150.67-EG1 (219)
JOHNSON CONTROLS 13
Selection Data
GUIDE TO SELECTION
Capacity ratings for the YCAL Packaged Air-Cooled Liquid Chillers, shown on pages 20
through 37 cover the majority of design applications for these units. For unusual appli-
cations or uses beyond the scope of this catalog, please consult your nearest Johnson
Controls Office or sales representative.
SELECTION RULES
1. Ratings – Ratings may be interpolated, but must not be extrapolated. The Ratings
on page 20 and the Design Parameters on page 17 indicate the limits of ap-
plication 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 20 through 37 give capacity, compressor 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 thermal conductivity of copper is
slightly higher than aluminum, apply the following corrections to the standard rat-
ings. Tons x 0.97 and compressor kW x 0.99.
5. Performance Data Correction Factors – Ratings are based on 0.0001 cooler foul-
ing factor, 10°F chilled water range and at sea level. For operation at different condi-
tions, apply the appropriate correction factor from the following table.
FOULING FACTOR
ALTITUDE TEMP SPLIT
0.0001 0.0003
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