York YCAS User Manual

46
YORK INTERNATIONAL
FORM 201.19-NM6 (804)
Technical Data
SECTION 7 - TECHNICAL DATA
The evaporator is designed in accordance with ARI-590-
92 which allows for an increase in pres sure drop of up
to 15% above the design value given above. Debris in
the water may also cause additional pressure drop.
When using glycol solutions, pressure drops are high er
than with water (see correction factors to be applied
when using glycol solutions).
A = Correction Factor
B = Mean Temperature through Evaporator (°C)
C = Concentration W/W (%)
FIG. 15 – FLOW RATE AND PRESSURE DROP CHARTS
FIG. 16 – GLYCOL CORRECTION FACTORS
FLOW RATE AND PRESSURE DROP CHARTS
Excessive fl ow, above the max GPM,
will damage the evaporator.
GLYCOL CORRECTION FACTORS
ETHYLENE GLYCOL
PROPYLENE GLYCOL
A
A
B
B
C
C
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
-10 -8 -6 -4 -2 0 2 4 6 8
-10 -8 -6 -4 -2 0 2 4 6 8
50%
40%
30%
20%
10%
50%
40%
30%
20%
10%
LD03504
°C
°C
GLYCOL CORRECTION EXAMPLE: (With YCAS0140)
• RWT = 36°F LWT = 28°F
• Average Water Temperature = 32°F (= 0°C)
• For 30% Propylene Glycol: From Graph, Find Correction Factor =
1.3 @ 0°C and 30%
• Actual Measured ∆P = 12' H20
• Corrected ∆P = 12'/1.3 = 9.2' H20
• From Flow Rate and Pressure Drop Chart, locate ß ow @ 9.2' ≈
300 GPM
EVAPORATOR WATER PRESSURE DROP
(SI UNITS)
LD04482A
MODEL NUMBER YCAS EVAPORATOR
0693, 0773, 0783, 0873, 0953 E
1063, 1093, 1163, 1263 F
Pressure Conversion : Ft H20 = 2.3 x PSI
YCAS0250 - 0440
1.00
10.00
100.00
1000.00
10.00 100.00
Press Drop, kPA
E
F
Water Flow (l/s)

York YCAS Specifications

General

Brand	York
Model	YCAS
Category	Chiller
Language	English