A LOOK AT SERVICE SAFETY
Installation and Replacement Information
99
Figure 5-8.
Refrigerant line velocities for “Freon” 22 refrigerant (reprinted by permission of DuPont Fluorochemicals).
0.1
0.2
0.4
0.6
1
2
4
6
10
20
40
60
100
2000
3000
4000
6000
8000
10,000
BTU's Per HR
15
15
20
30
40
60
80
100
150
200
300
400
600
800
1000
1500
2000
3000
4000
6000
8000
10,000
20
30
40
60
80
100
150
200
300
400
600
800
1000
1500
2000
3000
4000
6000
8000
10,000
At 80°F Condenser
At 100°F Condenser
At 120°F Condenser
5
1
/8
"
4
1
/8
"
-60
°F
E
vap
o
ra
tor T
e
m
p
e
ratu
re
D
isch
a
rg
e
lin
es 8
0°F
C
o
n
den
se
r
-40
°F
-2
0
°F
2
0
°F
4
0°F
L
iqu
id
L
in
e
10
0
°F
C
o
n
de
n
se
r
1
20
°F
C
o
n
d
e
nser
0
°F
3
5
/8
"
3
1
/8
"
2
5
/8
"
2
1
/8
"
1
5
/8
"
1
3
/8
"
1
1
/8
"
7
/8
"
O
.D
. T
yp
e L
C
opp
e
r T
u
b
in
g
5
/8
"
1
/2
"
3
/8
"
3
/4
"
Tons of Refrigeration
Velocity, Feet/Minute
EXAMPLE:
5.5 Tons at -40°F Evap. 85°F Cond.
2
5
/8
" Suction Line Velocity = 1718 ft./min.
5
/8
" Liquid Line Velocity = 114 ft./min.
NOTE: Liquid line determined
at 0°F evap. and 80°F
cond. Discharge lines
at 0°F evap. Net
refrigeration for "Freon"
22 includes suction gas
at 65°F.
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