York YVAA Style A - Evaporator Water Pressure Drop Charts; Two-Pass and Three-Pass Evaporator Pressure Drop

SECTION 4 - INSTALLATION
JOHNSON CONTROLS
39
Form 201.28-NM1.1
Issue date: 08/06/2021
4
50.0
40.0
30.0
20.0
10.0
0.0
200 400 600 800 1000 1200 1400 1600 1800 2000
Flow Rate (GPM)
Water Pressure Drop (ft. H O)
²
Evaporator Type
A
D
B
C
E
H, K
F, G
I, J
LD20286
Water temperature = 50°F
Figure 6 - Two pass water pressure drop, English units
Figure 7 - Three pass water pressure drop, English units
200 400
600 800 1000
1200
0.0
10.0
20.0
30.0
40.0
50.0
Water Te mperature = 50°F
Wa
ter Pressure Drop (ft. H O)
B
Flow Rate (GPM)
LD20287
Evaporator Type
A
D
C
E
H, K
F, G
I, J
See Table 7 on page 70 for optional
single pass, Table 8 on page 74 for
standard 2-pass and Table 9 on page 78
for optional 3-pass to determine evapora-
tor/frame size and to find the evaporator
line to use.