A LOOK AT SERVICE SAFETY
Installation and Replacement Information
95
Figure 5-4.
Refrigerant line pressure drops for “Freon” 502 refrigerant (reprinted by permission of DuPont
0.2
0.3
0.4
0.6
0.8
1
2
3
4
6
8
10
20
30
40
60
80
100
2000
3000
4000
6000
8000
10,000
BTU's Per HR
0.2
0.2
0.3
0.4
0.6
0.8
1
2
3
4
6
8
10
20
30
40
50
2
3
4
5
6 810
20
30 40 50
0.3 0.4
0.6 0.8 1
At 80
°
F Condenser
At 100
°
F Condenser
At 120
°
F Condenser
7
1 /8
"
6
1 /8
"
5
1 /8
"
4
1 /8
"
3
5 /8
"
3
1 /8
"
2
5 /8
"
2
1 /8
"
1
5 /8
"
1
3 /8
"
1
1 /8
"
7 /8
"
3 /4
"
1 /2
"
3 /8
"
5 /8
"
O
.D
. T
yp
e
L
C
op
pe
r T
ub
in
g
-60
°
F Evapor
ator
Temper
ature
-40
°
F
Tons of Refrigeration
Pressure Drop In Lbs. Per Sq. In. Per 100 Ft.
EXAMPLE:
5.5 Tons at -40
°
F Evap. 85
°
F Cond.
Choose 2
5/8
" Suction Line Pressure Drop = 0.3
Choose
3/4
" Liquid Line Pressure Drop = 1.7
-20
°
F
2
0
°
F
40
°
F
Discharge Line
Liquid Line
0
°
F
NOTE: Pressure drops do not allow for
pulsating flow. If flow is pulsating,
use next larger pipe size.