York YCAS0130, Installation, Operation & Maintenance Manual, Page: 48 / 204

48
YORK INTERNATIONAL
FORM 201.19-NM1 (204)
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 (%)
EVAPORATOR WATER PRESSURE DROP
(ENGLISH UNITS) EVAPORATOR WATER PRESSURE DROP
(SI UNITS)
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.
LD09230A
LD04482A
GLYCOL CORRECTION FACTORS
Technical Data
MODEL NUMBER YCAS EVAPORATOR
0130, 0140 A
0150, 0160, 0170, 0180, B
0200, 0210, C
0230 D
MODEL NUMBER YCAS EVAPORATOR
0130, 0140 A
0150, 0160, 0170, 0180, B
0200, 0210, C
0230 D
Pressure Conversion : Ft H20 = 2.3 x PSI
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' H
2
0
•
Corrected ∆ P = 12'/1.3 = 9.2' H
2
0
•
From Flow Rate and Pressure Drop Chart, locate fl ow @ 9.2' ≈
300 GPM
YCAS0130 - 0230
1.00
10.00
100.00
1000.00
10.00 100.00 50.00
Flow, L/S
P
re
ss D
ro
p,
kP
A
A
B
C
D
YCAS0130 - 0230
1.00
10.00
100.00
100
500 1000
Flow, GPM
P
re
ss
D
ro
p,
Ft H
2O
A
B
C
D