York YCAL0065, YCAL0041 Selection Data, Guide to Selection, Selection Rules, Method of Selection

Selection Data

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.

FOULING FACTOR

	TEMP	0.0001		0.00025
ALTITUDE		TONS	COMPR	TONS	COMPR
	SPLIT
			kW		kW
	8	0.990	0.998	0.979	0.996
SEA LEVEL	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
	8	0.987	1.005	0.978	1.003
2000 FT.	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
	8	0.983	1.014	0.975	1.012
4000 FT.	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
	8	0.980	1.023	0.971	1.021
6000 FT.	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

6.Ethylene Glycol Correction Factors – The fol- lowing factors are to be applied to the standard ratings for units cooling ethylene glycol.

ETHYLENE GLYCOL

%	TONS	COMPR	GPM	PRESS	FREEZE
WEIGHT		KW	°F/TON	DROP	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

7.Propylene Glycol Correction Factors – The fol- lowing factors are to be applied to the standard ratings for units cooling propylene glycol.

PROPYLENE GLYCOL

%	TONS	COMPR	GPM	PRESS	FREEZE
WEIGHT		KW	°F/TON	DROP	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

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)

YORK INTERNATIONAL 11