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FLOW RATE AND PRESSURE DROP CHARTS
COOLER WATER PRESSURE DROP
(ENGLISH UNITS)
Water Cooler Pressure Drop
100
C1
10
1
100
Water Flow (gpm)
MODEL NUMBER YCAS
0098, 0118, 0138
0128, 0148, 0158, 0178, 0198, 0208
FIG. 14 – FLOW RATE AND PRESSURE DROP CHARTS
The cooler is designed in accordance with ARI-590-92
which allows for an increase in pressure 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 higher
than with water (see correction factors to be applied
when using glycol solutions). Special care must be taken
not to exceed the maximum allowed.
A = Correction Factor
B = Mean Temperature through Cooler
C = Concentration W/W
Excessive flow, above the max GPM,
will damage the evaporator.
FIG. 15 – GLYCOL CORRECTION FACTORS
46
TECHNICAL DATA
C2
1000
LD05825A
COOLER
C1
C2
GLYCOL CORRECTION FACTORS
COOLER WATER PRESSURE DROP
(SI UNITS)
COOLER WATER PRESSURE DROP (SI UNITS)
1000
100
10
1
1
MODEL NUMBER YCAS
0098, 0118, 0138
0128, 0148, 0158, 0178, 0198, 0208
ETHYLENE GLYCOL
1.45
1.40
1.35
1.30
A
1.25
1.20
1.15
1.10
1.05
-10
-8
-6
-4
-2
PROPYLENE GLYCOL
1.8
1.7
1.6
1.5
A
1.4
1.3
1.2
1.1
1.0
-10
-8
-6
-4
-2
C1
C2
10
WATER FLOW (l/s)
LD05884A
COOLER
C1
C2
50%
40%
30%
20%
10%
0
2
4
6
8
B
50%
40%
30%
20%
10%
0
2
4
6
8
B
LD03504A
JOHNSON CONTROLS
100
C
7
C
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