46
YORK INTERNATIONAL
FORM 201.19-NM8 (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
Pressure Conversion : Ft H20 = 2.3 x PSI
LD05883
100
10
1
100
1000
10
Pressure Drop (kPa)
Water Flow (l/s)
C3
C5C4
MODEL NUMBER YCAS EVAPORATOR
0685 C3
0775, 0835, 0905, 0965 C4
1065, 1135, 1215 C5
3 AND 4 CIRCUIT CHILLERS
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