York YCAL0014, Руководство пользователя

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JOHNSON CONTROLS
11
FORM 150.62-EG1 (507)
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 Chill-
er,
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 10°F range, 0.0001FF, 80°F air on the
condenser, at sea level and 60 Hz.
2. FIND: Unit Size
Compressor kW Input
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
ETHYLENE GLYCOL
% WEIGHT TONS COMPR GPM
°
F/TON PRESS FREEZE PT
kW DROP
10 0.985 0.997 24.1 1.034 26
20 0.981 0.996 24.9 1.062 16
30 0.974 0.995 26.1 1.096 5
40 0.966 0.991 27.5 1.134 ‑10
50 0.957 0.989 29.1 1.172 ‑32
PROPYLENE GLYCOL
% WEIGHT TONS COMPR GPM
°
F/TON PRESS FREEZE PT
kW DROP
10 0.983 0.996 24.2 1.048 27
20 0.974 0.995 24.4 1.086 19
30 0.961 0.990 25.1 1.134 8
40 0.946 0.98 26.0 1.186 ‑5
50 0.928 0.984 27.2 1.247 ‑25
FOULING FACTOR
ALTITUDE
TEMP
SPLIT
0.0001 0.00025
TONS
COMPR
kW
TONS
COMPR
kW
SEA LEVEL
8 0.994 0.999 0.991 0.998
10 1.000 1.000 0.993 0.999
12 1.005 1.001 0.999 0.999
14 1.008 1.002 1.005 1.000
2000 FT.
8 0.990 1.010 0.984 1.009
10 0.995 1.010 0.990 1.009
12 0.999 1.011 0.995 1.010
14 1.004 1.015 0.998 1.011
4000 FT.
8 0.983 1.021 0.977 1.020
10 0.989 1.024 0.983 1.021
12 0.994 1.025 0.988 1.024
14 0.997 1.026 0.993 1.025
6000 FT.
8 0.978 1.035 0.973 1.034
10 0.982 1.037 0.978 1.035
12 0.987 1.037 0.980 1.036
14 0.992 1.038 0.986 1.037