Page 14
Issue 0912 506253-01
_____ °
Liquid Line Temperature °F
_____ °
Outdoor Ambient Temperature °F
_____ °
Approach Temperature °F
–
=
6. Compare the approach value with those shown in
Table 7. If the values to do not agree with those
provided in Table 7, add refrigerant to lower the
approach temperature or recover refrigerant from the
system to increase the approach temperature.
Check Charge Using Normal Operating Pressures
Use Table 8 to perform maintenance checks. Table 8 is
not a procedure for charging the system. Minor variations
in these pressures may be due to differences in installa-
tions. Significant deviations could mean that the system is
not properly charged or that a problem exists with some
component in the system.
R410A Temperature/Pressure Chart
Table 5
.
p
m
e
T
F
°
e
r
u
s
s
e
r
P
g
i
s
P
2
3
8
.
0
0
1
3
3
9
.
2
0
1
4
3
0
.
5
0
1
5
3
1
.
7
0
1
6
3
2
.
9
0
1
7
3
4
.
1
1
1
8
3
6
.
3
1
1
9
3
8
.
5
1
1
0
4
0
.
8
1
1
1
4
3
.
0
2
1
2
4
6
.
2
2
1
3
4
0
.
5
2
1
4
4
3
.
7
2
1
5
4
7
.
9
2
1
6
4
2
.
2
3
1
7
4
6
.
4
3
1
8
4
1
.
7
3
1
9
4
6
.
9
3
1
0
5
2
.
2
4
1
1
5
8
.
4
4
1
2
5
4
.
7
4
1
3
5
1
.
0
5
1
4
5
8
.
2
5
1
5
5
5
.
5
5
1
6
5
2
.
8
5
1
7
5
0
.
1
6
1
8
5
9
.
3
6
1
9
5
7
.
6
6
1
0
6
6
.
9
6
1
1
6
6
.
2
7
1
2
6
5
.
5
7
1
3
6
5
.
8
7
1
4
6
6
.
1
8
1
5
6
3
.
4
8
1
6
6
7
.
7
8
1
7
6
9
.
0
9
1
8
6
1
.
4
9
1
9
6
3
.
7
9
1
0
7
6
.
0
0
2
1
7
9
.
3
0
2
2
7
2
.
7
0
2
3
7
6
.
0
1
2
.
p
m
e
T
F
°
e
r
u
s
s
e
r
P
g
i
s
P
4
7
0
.
4
1
2
5
7
4
.
7
1
2
6
7
9
.
0
2
2
7
7
4
.
4
2
2
8
7
0
.
8
2
2
9
7
6
.
1
3
2
0
8
3
.
5
3
2
1
8
0
.
9
3
2
2
8
7
.
2
4
2
3
8
5
.
6
4
2
4
8
3
.
0
5
2
5
8
1
.
4
5
2
6
8
0
.
8
5
2
7
8
0
.
2
6
2
8
8
0
.
6
6
2
9
8
0
.
0
7
2
0
9
1
.
4
7
2
1
9
2
.
8
7
2
2
9
3
.
2
8
2
3
9
5
.
6
8
2
4
9
8
.
0
9
2
5
9
1
.
5
9
2
6
9
4
.
9
9
2
7
9
8
.
3
0
3
8
9
2
.
8
0
3
9
9
7
.
2
1
3
0
0
1
2
.
7
1
3
1
0
1
8
.
1
2
3
2
0
1
4
.
6
2
3
3
0
1
0
.
1
3
3
4
0
1
7
.
5
3
3
5
0
1
5
.
0
4
3
6
0
1
3
.
5
4
3
7
0
1
1
.
0
5
3
8
0
1
0
.
5
5
3
9
0
1
0
.
0
6
3
0
1
1
0
.
5
6
3
1
1
1
0
.
0
7
3
2
1
1
1
.
5
7
3
3
1
1
2
.
0
8
3
4
1
1
4
.
5
8
3
5
1
1
7
.
0
9
3
.
p
m
e
T
F
°
e
r
u
s
s
e
r
P
g
i
s
P
6
1
1
0
.
6
9
3
7
1
1
3
.
1
0
4
8
1
1
7
.
6
0
4
9
1
1
2
.
2
1
4
0
2
1
7
.
7
1
4
1
2
1
2
.
3
2
4
2
2
1
8
.
8
2
4
3
2
1
5
.
4
3
4
4
2
1
2
.
0
4
4
5
2
1
9
.
5
4
4
6
2
1
8
.
1
5
4
7
2
1
6
.
7
5
4
8
2
1
5
.
3
6
4
9
2
1
5
.
9
6
4
0
3
1
6
.
5
7
4
1
3
1
6
.
1
8
4
2
3
1
8
.
7
8
4
3
3
1
0
.
4
9
4
4
3
1
2
.
0
0
5
5
3
1
5
.
6
0
5
6
3
1
9
.
2
1
5
7
3
1
3
.
9
1
5
8
3
1
8
.
5
2
5
9
3
1
4
.
2
3
5
0
4
1
0
.
9
3
5
1
4
1
6
.
5
4
5
2
4
1
3
.
2
5
5
3
4
1
1
.
9
5
5
4
4
1
9
.
5
6
5
5
4
1
8
.
2
7
5
6
4
1
8
.
9
7
5
7
4
1
8
.
6
8
5
8
4
1
8
.
3
9
5
9
4
1
0
.
1
0
6
0
5
1
1
.
8
0
6
1
5
1
4
.
5
1
6
2
5
1
7
.
2
2
6
3
5
1
1
.
0
3
6
4
5
1
5
.
7
3
6
5
5
1
0
.
5
4
6
Subcooling Values
Table 6
l
e
d
o
M
4
2
-
6
3
-
8
4
-
0
6
-
F
°
.
p
m
e
T
5
6
6
9
Approach Values for TXV Systems
Approach value is the liquid line temperature
minus the outdoor ambient temperature (±1°F).
NOTE: For best results, use the same digital
thermometer to check both outdoor ambient and
liquid temperatures.
Table 7
l
e
d
o
M
4
2
-
6
3
-
8
4
-
0
6
-
F
°
.
p
m
e
T
8
0
1
8
4
