Page 14
# 48478A006
4. Subtract the liquid line temperature from the satura-
tion temperature (according to the chart) to determine
subcooling.
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
_____ °
Saturation Temperature °F
_____ °
Liquid Line Temperature °F
_____ °
Subcooling Value °F
–
=
Figure 13
Outdoor coil should be
blocked one side at a time
with cardboard or plastic
sheet until proper testing
pressures are reached.
Blocking Outdoor Coil
Cardboard or Plastic Sheet
5. Compare the subcooling value with those shown in
Table 6. If subcooling is greater than shown, recover
some refrigerant. If subcooling is less than shown,
add some refrigerant.
Charge Using Approach Method –
Outdoor Temperatures 65°F or Above
The following procedure is intended as a general guide
and is for use on expansion valve systems only. For best
results, indoor temperature should 70°F to 80°F. Monitor
system pressures while charging.
1. Record outdoor ambient temperature using a digital
thermometer.
2. Attach high pressure gauge set and operate unit for
several minutes to allow system pressures to stabilize.
3. Compare stabilized pressures with those provided in
Table 7. Minor variations in these pressures may be
Subcooling Values
Table 6
l
e
d
o
M
4
2
-
6
3
-
8
4
-
0
6
-
F
°
.
p
m
e
T
8
7
9
8
